mirror of
https://github.com/RPCS3/llvm-mirror.git
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f743f61832
Summary:
This adds support for defining patterns for global isel using pointer
types, for example:
def : Pat<(load GPR32:$src),
(p1 (LOAD GPR32:$src))>;
DAGISelEmitter will ignore the pointer information and treat these
types as integers with the same bit-width as the pointer type.
Reviewers: dsanders, rtereshin, arsenm
Reviewed By: arsenm
Subscribers: Petar.Avramovic, wdng, rovka, kristof.beyls, jfb, volkan, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57065
llvm-svn: 354510
4871 lines
178 KiB
C++
4871 lines
178 KiB
C++
//===- GlobalISelEmitter.cpp - Generate an instruction selector -----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// This tablegen backend emits code for use by the GlobalISel instruction
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/// selector. See include/llvm/CodeGen/TargetGlobalISel.td.
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///
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/// This file analyzes the patterns recognized by the SelectionDAGISel tablegen
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/// backend, filters out the ones that are unsupported, maps
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/// SelectionDAG-specific constructs to their GlobalISel counterpart
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/// (when applicable: MVT to LLT; SDNode to generic Instruction).
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///
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/// Not all patterns are supported: pass the tablegen invocation
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/// "-warn-on-skipped-patterns" to emit a warning when a pattern is skipped,
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/// as well as why.
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///
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/// The generated file defines a single method:
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/// bool <Target>InstructionSelector::selectImpl(MachineInstr &I) const;
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/// intended to be used in InstructionSelector::select as the first-step
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/// selector for the patterns that don't require complex C++.
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///
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/// FIXME: We'll probably want to eventually define a base
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/// "TargetGenInstructionSelector" class.
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///
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//===----------------------------------------------------------------------===//
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#include "CodeGenDAGPatterns.h"
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#include "SubtargetFeatureInfo.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/CodeGenCoverage.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/LowLevelTypeImpl.h"
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#include "llvm/Support/MachineValueType.h"
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#include "llvm/Support/ScopedPrinter.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/TableGen/TableGenBackend.h"
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#include <numeric>
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#include <string>
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using namespace llvm;
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#define DEBUG_TYPE "gisel-emitter"
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STATISTIC(NumPatternTotal, "Total number of patterns");
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STATISTIC(NumPatternImported, "Number of patterns imported from SelectionDAG");
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STATISTIC(NumPatternImportsSkipped, "Number of SelectionDAG imports skipped");
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STATISTIC(NumPatternsTested, "Number of patterns executed according to coverage information");
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STATISTIC(NumPatternEmitted, "Number of patterns emitted");
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cl::OptionCategory GlobalISelEmitterCat("Options for -gen-global-isel");
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static cl::opt<bool> WarnOnSkippedPatterns(
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"warn-on-skipped-patterns",
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cl::desc("Explain why a pattern was skipped for inclusion "
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"in the GlobalISel selector"),
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cl::init(false), cl::cat(GlobalISelEmitterCat));
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static cl::opt<bool> GenerateCoverage(
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"instrument-gisel-coverage",
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cl::desc("Generate coverage instrumentation for GlobalISel"),
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cl::init(false), cl::cat(GlobalISelEmitterCat));
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static cl::opt<std::string> UseCoverageFile(
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"gisel-coverage-file", cl::init(""),
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cl::desc("Specify file to retrieve coverage information from"),
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cl::cat(GlobalISelEmitterCat));
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static cl::opt<bool> OptimizeMatchTable(
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"optimize-match-table",
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cl::desc("Generate an optimized version of the match table"),
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cl::init(true), cl::cat(GlobalISelEmitterCat));
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namespace {
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//===- Helper functions ---------------------------------------------------===//
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/// Get the name of the enum value used to number the predicate function.
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std::string getEnumNameForPredicate(const TreePredicateFn &Predicate) {
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if (Predicate.hasGISelPredicateCode())
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return "GIPFP_MI_" + Predicate.getFnName();
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return "GIPFP_" + Predicate.getImmTypeIdentifier().str() + "_" +
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Predicate.getFnName();
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}
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/// Get the opcode used to check this predicate.
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std::string getMatchOpcodeForPredicate(const TreePredicateFn &Predicate) {
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return "GIM_Check" + Predicate.getImmTypeIdentifier().str() + "ImmPredicate";
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}
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/// This class stands in for LLT wherever we want to tablegen-erate an
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/// equivalent at compiler run-time.
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class LLTCodeGen {
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private:
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LLT Ty;
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public:
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LLTCodeGen() = default;
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LLTCodeGen(const LLT &Ty) : Ty(Ty) {}
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std::string getCxxEnumValue() const {
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std::string Str;
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raw_string_ostream OS(Str);
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emitCxxEnumValue(OS);
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return OS.str();
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}
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void emitCxxEnumValue(raw_ostream &OS) const {
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if (Ty.isScalar()) {
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OS << "GILLT_s" << Ty.getSizeInBits();
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return;
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}
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if (Ty.isVector()) {
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OS << "GILLT_v" << Ty.getNumElements() << "s" << Ty.getScalarSizeInBits();
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return;
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}
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if (Ty.isPointer()) {
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OS << "GILLT_p" << Ty.getAddressSpace();
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if (Ty.getSizeInBits() > 0)
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OS << "s" << Ty.getSizeInBits();
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return;
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}
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llvm_unreachable("Unhandled LLT");
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}
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void emitCxxConstructorCall(raw_ostream &OS) const {
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if (Ty.isScalar()) {
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OS << "LLT::scalar(" << Ty.getSizeInBits() << ")";
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return;
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}
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if (Ty.isVector()) {
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OS << "LLT::vector(" << Ty.getNumElements() << ", "
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<< Ty.getScalarSizeInBits() << ")";
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return;
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}
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if (Ty.isPointer() && Ty.getSizeInBits() > 0) {
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OS << "LLT::pointer(" << Ty.getAddressSpace() << ", "
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<< Ty.getSizeInBits() << ")";
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return;
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}
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llvm_unreachable("Unhandled LLT");
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}
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const LLT &get() const { return Ty; }
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/// This ordering is used for std::unique() and llvm::sort(). There's no
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/// particular logic behind the order but either A < B or B < A must be
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/// true if A != B.
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bool operator<(const LLTCodeGen &Other) const {
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if (Ty.isValid() != Other.Ty.isValid())
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return Ty.isValid() < Other.Ty.isValid();
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if (!Ty.isValid())
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return false;
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if (Ty.isVector() != Other.Ty.isVector())
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return Ty.isVector() < Other.Ty.isVector();
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if (Ty.isScalar() != Other.Ty.isScalar())
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return Ty.isScalar() < Other.Ty.isScalar();
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if (Ty.isPointer() != Other.Ty.isPointer())
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return Ty.isPointer() < Other.Ty.isPointer();
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if (Ty.isPointer() && Ty.getAddressSpace() != Other.Ty.getAddressSpace())
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return Ty.getAddressSpace() < Other.Ty.getAddressSpace();
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if (Ty.isVector() && Ty.getNumElements() != Other.Ty.getNumElements())
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return Ty.getNumElements() < Other.Ty.getNumElements();
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return Ty.getSizeInBits() < Other.Ty.getSizeInBits();
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}
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bool operator==(const LLTCodeGen &B) const { return Ty == B.Ty; }
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};
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// Track all types that are used so we can emit the corresponding enum.
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std::set<LLTCodeGen> KnownTypes;
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class InstructionMatcher;
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/// Convert an MVT to an equivalent LLT if possible, or the invalid LLT() for
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/// MVTs that don't map cleanly to an LLT (e.g., iPTR, *any, ...).
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static Optional<LLTCodeGen> MVTToLLT(MVT::SimpleValueType SVT) {
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MVT VT(SVT);
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if (VT.isVector() && VT.getVectorNumElements() != 1)
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return LLTCodeGen(
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LLT::vector(VT.getVectorNumElements(), VT.getScalarSizeInBits()));
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if (VT.isInteger() || VT.isFloatingPoint())
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return LLTCodeGen(LLT::scalar(VT.getSizeInBits()));
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return None;
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}
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static std::string explainPredicates(const TreePatternNode *N) {
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std::string Explanation = "";
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StringRef Separator = "";
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for (const TreePredicateCall &Call : N->getPredicateCalls()) {
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const TreePredicateFn &P = Call.Fn;
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Explanation +=
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(Separator + P.getOrigPatFragRecord()->getRecord()->getName()).str();
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Separator = ", ";
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if (P.isAlwaysTrue())
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Explanation += " always-true";
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if (P.isImmediatePattern())
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Explanation += " immediate";
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if (P.isUnindexed())
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Explanation += " unindexed";
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if (P.isNonExtLoad())
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Explanation += " non-extload";
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if (P.isAnyExtLoad())
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Explanation += " extload";
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if (P.isSignExtLoad())
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Explanation += " sextload";
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if (P.isZeroExtLoad())
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Explanation += " zextload";
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if (P.isNonTruncStore())
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Explanation += " non-truncstore";
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if (P.isTruncStore())
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Explanation += " truncstore";
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if (Record *VT = P.getMemoryVT())
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Explanation += (" MemVT=" + VT->getName()).str();
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if (Record *VT = P.getScalarMemoryVT())
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Explanation += (" ScalarVT(MemVT)=" + VT->getName()).str();
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if (P.isAtomicOrderingMonotonic())
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Explanation += " monotonic";
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if (P.isAtomicOrderingAcquire())
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Explanation += " acquire";
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if (P.isAtomicOrderingRelease())
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Explanation += " release";
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if (P.isAtomicOrderingAcquireRelease())
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Explanation += " acq_rel";
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if (P.isAtomicOrderingSequentiallyConsistent())
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Explanation += " seq_cst";
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if (P.isAtomicOrderingAcquireOrStronger())
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Explanation += " >=acquire";
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if (P.isAtomicOrderingWeakerThanAcquire())
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Explanation += " <acquire";
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if (P.isAtomicOrderingReleaseOrStronger())
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Explanation += " >=release";
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if (P.isAtomicOrderingWeakerThanRelease())
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Explanation += " <release";
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}
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return Explanation;
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}
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std::string explainOperator(Record *Operator) {
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if (Operator->isSubClassOf("SDNode"))
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return (" (" + Operator->getValueAsString("Opcode") + ")").str();
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if (Operator->isSubClassOf("Intrinsic"))
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return (" (Operator is an Intrinsic, " + Operator->getName() + ")").str();
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if (Operator->isSubClassOf("ComplexPattern"))
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return (" (Operator is an unmapped ComplexPattern, " + Operator->getName() +
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")")
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.str();
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if (Operator->isSubClassOf("SDNodeXForm"))
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return (" (Operator is an unmapped SDNodeXForm, " + Operator->getName() +
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")")
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.str();
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return (" (Operator " + Operator->getName() + " not understood)").str();
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}
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/// Helper function to let the emitter report skip reason error messages.
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static Error failedImport(const Twine &Reason) {
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return make_error<StringError>(Reason, inconvertibleErrorCode());
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}
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static Error isTrivialOperatorNode(const TreePatternNode *N) {
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std::string Explanation = "";
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std::string Separator = "";
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bool HasUnsupportedPredicate = false;
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for (const TreePredicateCall &Call : N->getPredicateCalls()) {
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const TreePredicateFn &Predicate = Call.Fn;
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if (Predicate.isAlwaysTrue())
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continue;
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if (Predicate.isImmediatePattern())
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continue;
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if (Predicate.isNonExtLoad() || Predicate.isAnyExtLoad() ||
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Predicate.isSignExtLoad() || Predicate.isZeroExtLoad())
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continue;
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if (Predicate.isNonTruncStore())
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continue;
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if (Predicate.isLoad() && Predicate.getMemoryVT())
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continue;
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if (Predicate.isLoad() || Predicate.isStore()) {
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if (Predicate.isUnindexed())
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continue;
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}
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if (Predicate.isAtomic() && Predicate.getMemoryVT())
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continue;
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if (Predicate.isAtomic() &&
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(Predicate.isAtomicOrderingMonotonic() ||
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Predicate.isAtomicOrderingAcquire() ||
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Predicate.isAtomicOrderingRelease() ||
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Predicate.isAtomicOrderingAcquireRelease() ||
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Predicate.isAtomicOrderingSequentiallyConsistent() ||
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Predicate.isAtomicOrderingAcquireOrStronger() ||
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Predicate.isAtomicOrderingWeakerThanAcquire() ||
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Predicate.isAtomicOrderingReleaseOrStronger() ||
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Predicate.isAtomicOrderingWeakerThanRelease()))
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continue;
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if (Predicate.hasGISelPredicateCode())
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continue;
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HasUnsupportedPredicate = true;
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Explanation = Separator + "Has a predicate (" + explainPredicates(N) + ")";
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Separator = ", ";
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Explanation += (Separator + "first-failing:" +
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Predicate.getOrigPatFragRecord()->getRecord()->getName())
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.str();
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break;
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}
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if (!HasUnsupportedPredicate)
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return Error::success();
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return failedImport(Explanation);
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}
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static Record *getInitValueAsRegClass(Init *V) {
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if (DefInit *VDefInit = dyn_cast<DefInit>(V)) {
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if (VDefInit->getDef()->isSubClassOf("RegisterOperand"))
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return VDefInit->getDef()->getValueAsDef("RegClass");
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if (VDefInit->getDef()->isSubClassOf("RegisterClass"))
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return VDefInit->getDef();
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}
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return nullptr;
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}
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std::string
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getNameForFeatureBitset(const std::vector<Record *> &FeatureBitset) {
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std::string Name = "GIFBS";
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for (const auto &Feature : FeatureBitset)
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Name += ("_" + Feature->getName()).str();
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return Name;
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}
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//===- MatchTable Helpers -------------------------------------------------===//
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class MatchTable;
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/// A record to be stored in a MatchTable.
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///
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/// This class represents any and all output that may be required to emit the
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/// MatchTable. Instances are most often configured to represent an opcode or
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/// value that will be emitted to the table with some formatting but it can also
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/// represent commas, comments, and other formatting instructions.
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struct MatchTableRecord {
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enum RecordFlagsBits {
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MTRF_None = 0x0,
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/// Causes EmitStr to be formatted as comment when emitted.
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MTRF_Comment = 0x1,
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/// Causes the record value to be followed by a comma when emitted.
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MTRF_CommaFollows = 0x2,
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/// Causes the record value to be followed by a line break when emitted.
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MTRF_LineBreakFollows = 0x4,
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/// Indicates that the record defines a label and causes an additional
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/// comment to be emitted containing the index of the label.
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MTRF_Label = 0x8,
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/// Causes the record to be emitted as the index of the label specified by
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/// LabelID along with a comment indicating where that label is.
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MTRF_JumpTarget = 0x10,
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/// Causes the formatter to add a level of indentation before emitting the
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/// record.
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MTRF_Indent = 0x20,
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/// Causes the formatter to remove a level of indentation after emitting the
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/// record.
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MTRF_Outdent = 0x40,
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};
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/// When MTRF_Label or MTRF_JumpTarget is used, indicates a label id to
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/// reference or define.
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unsigned LabelID;
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/// The string to emit. Depending on the MTRF_* flags it may be a comment, a
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/// value, a label name.
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std::string EmitStr;
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private:
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/// The number of MatchTable elements described by this record. Comments are 0
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/// while values are typically 1. Values >1 may occur when we need to emit
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/// values that exceed the size of a MatchTable element.
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unsigned NumElements;
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public:
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/// A bitfield of RecordFlagsBits flags.
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unsigned Flags;
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/// The actual run-time value, if known
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int64_t RawValue;
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MatchTableRecord(Optional<unsigned> LabelID_, StringRef EmitStr,
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unsigned NumElements, unsigned Flags,
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int64_t RawValue = std::numeric_limits<int64_t>::min())
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: LabelID(LabelID_.hasValue() ? LabelID_.getValue() : ~0u),
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EmitStr(EmitStr), NumElements(NumElements), Flags(Flags),
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RawValue(RawValue) {
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assert((!LabelID_.hasValue() || LabelID != ~0u) &&
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"This value is reserved for non-labels");
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}
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MatchTableRecord(const MatchTableRecord &Other) = default;
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MatchTableRecord(MatchTableRecord &&Other) = default;
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/// Useful if a Match Table Record gets optimized out
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void turnIntoComment() {
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Flags |= MTRF_Comment;
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Flags &= ~MTRF_CommaFollows;
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NumElements = 0;
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}
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/// For Jump Table generation purposes
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bool operator<(const MatchTableRecord &Other) const {
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return RawValue < Other.RawValue;
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}
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int64_t getRawValue() const { return RawValue; }
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void emit(raw_ostream &OS, bool LineBreakNextAfterThis,
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const MatchTable &Table) const;
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unsigned size() const { return NumElements; }
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};
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class Matcher;
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/// Holds the contents of a generated MatchTable to enable formatting and the
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/// necessary index tracking needed to support GIM_Try.
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class MatchTable {
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/// An unique identifier for the table. The generated table will be named
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/// MatchTable${ID}.
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unsigned ID;
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/// The records that make up the table. Also includes comments describing the
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/// values being emitted and line breaks to format it.
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std::vector<MatchTableRecord> Contents;
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/// The currently defined labels.
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DenseMap<unsigned, unsigned> LabelMap;
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/// Tracks the sum of MatchTableRecord::NumElements as the table is built.
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unsigned CurrentSize = 0;
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/// A unique identifier for a MatchTable label.
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unsigned CurrentLabelID = 0;
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/// Determines if the table should be instrumented for rule coverage tracking.
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bool IsWithCoverage;
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public:
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static MatchTableRecord LineBreak;
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static MatchTableRecord Comment(StringRef Comment) {
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return MatchTableRecord(None, Comment, 0, MatchTableRecord::MTRF_Comment);
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}
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static MatchTableRecord Opcode(StringRef Opcode, int IndentAdjust = 0) {
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unsigned ExtraFlags = 0;
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if (IndentAdjust > 0)
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ExtraFlags |= MatchTableRecord::MTRF_Indent;
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if (IndentAdjust < 0)
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ExtraFlags |= MatchTableRecord::MTRF_Outdent;
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|
|
return MatchTableRecord(None, Opcode, 1,
|
|
MatchTableRecord::MTRF_CommaFollows | ExtraFlags);
|
|
}
|
|
static MatchTableRecord NamedValue(StringRef NamedValue) {
|
|
return MatchTableRecord(None, NamedValue, 1,
|
|
MatchTableRecord::MTRF_CommaFollows);
|
|
}
|
|
static MatchTableRecord NamedValue(StringRef NamedValue, int64_t RawValue) {
|
|
return MatchTableRecord(None, NamedValue, 1,
|
|
MatchTableRecord::MTRF_CommaFollows, RawValue);
|
|
}
|
|
static MatchTableRecord NamedValue(StringRef Namespace,
|
|
StringRef NamedValue) {
|
|
return MatchTableRecord(None, (Namespace + "::" + NamedValue).str(), 1,
|
|
MatchTableRecord::MTRF_CommaFollows);
|
|
}
|
|
static MatchTableRecord NamedValue(StringRef Namespace, StringRef NamedValue,
|
|
int64_t RawValue) {
|
|
return MatchTableRecord(None, (Namespace + "::" + NamedValue).str(), 1,
|
|
MatchTableRecord::MTRF_CommaFollows, RawValue);
|
|
}
|
|
static MatchTableRecord IntValue(int64_t IntValue) {
|
|
return MatchTableRecord(None, llvm::to_string(IntValue), 1,
|
|
MatchTableRecord::MTRF_CommaFollows);
|
|
}
|
|
static MatchTableRecord Label(unsigned LabelID) {
|
|
return MatchTableRecord(LabelID, "Label " + llvm::to_string(LabelID), 0,
|
|
MatchTableRecord::MTRF_Label |
|
|
MatchTableRecord::MTRF_Comment |
|
|
MatchTableRecord::MTRF_LineBreakFollows);
|
|
}
|
|
static MatchTableRecord JumpTarget(unsigned LabelID) {
|
|
return MatchTableRecord(LabelID, "Label " + llvm::to_string(LabelID), 1,
|
|
MatchTableRecord::MTRF_JumpTarget |
|
|
MatchTableRecord::MTRF_Comment |
|
|
MatchTableRecord::MTRF_CommaFollows);
|
|
}
|
|
|
|
static MatchTable buildTable(ArrayRef<Matcher *> Rules, bool WithCoverage);
|
|
|
|
MatchTable(bool WithCoverage, unsigned ID = 0)
|
|
: ID(ID), IsWithCoverage(WithCoverage) {}
|
|
|
|
bool isWithCoverage() const { return IsWithCoverage; }
|
|
|
|
void push_back(const MatchTableRecord &Value) {
|
|
if (Value.Flags & MatchTableRecord::MTRF_Label)
|
|
defineLabel(Value.LabelID);
|
|
Contents.push_back(Value);
|
|
CurrentSize += Value.size();
|
|
}
|
|
|
|
unsigned allocateLabelID() { return CurrentLabelID++; }
|
|
|
|
void defineLabel(unsigned LabelID) {
|
|
LabelMap.insert(std::make_pair(LabelID, CurrentSize));
|
|
}
|
|
|
|
unsigned getLabelIndex(unsigned LabelID) const {
|
|
const auto I = LabelMap.find(LabelID);
|
|
assert(I != LabelMap.end() && "Use of undeclared label");
|
|
return I->second;
|
|
}
|
|
|
|
void emitUse(raw_ostream &OS) const { OS << "MatchTable" << ID; }
|
|
|
|
void emitDeclaration(raw_ostream &OS) const {
|
|
unsigned Indentation = 4;
|
|
OS << " constexpr static int64_t MatchTable" << ID << "[] = {";
|
|
LineBreak.emit(OS, true, *this);
|
|
OS << std::string(Indentation, ' ');
|
|
|
|
for (auto I = Contents.begin(), E = Contents.end(); I != E;
|
|
++I) {
|
|
bool LineBreakIsNext = false;
|
|
const auto &NextI = std::next(I);
|
|
|
|
if (NextI != E) {
|
|
if (NextI->EmitStr == "" &&
|
|
NextI->Flags == MatchTableRecord::MTRF_LineBreakFollows)
|
|
LineBreakIsNext = true;
|
|
}
|
|
|
|
if (I->Flags & MatchTableRecord::MTRF_Indent)
|
|
Indentation += 2;
|
|
|
|
I->emit(OS, LineBreakIsNext, *this);
|
|
if (I->Flags & MatchTableRecord::MTRF_LineBreakFollows)
|
|
OS << std::string(Indentation, ' ');
|
|
|
|
if (I->Flags & MatchTableRecord::MTRF_Outdent)
|
|
Indentation -= 2;
|
|
}
|
|
OS << "};\n";
|
|
}
|
|
};
|
|
|
|
MatchTableRecord MatchTable::LineBreak = {
|
|
None, "" /* Emit String */, 0 /* Elements */,
|
|
MatchTableRecord::MTRF_LineBreakFollows};
|
|
|
|
void MatchTableRecord::emit(raw_ostream &OS, bool LineBreakIsNextAfterThis,
|
|
const MatchTable &Table) const {
|
|
bool UseLineComment =
|
|
LineBreakIsNextAfterThis | (Flags & MTRF_LineBreakFollows);
|
|
if (Flags & (MTRF_JumpTarget | MTRF_CommaFollows))
|
|
UseLineComment = false;
|
|
|
|
if (Flags & MTRF_Comment)
|
|
OS << (UseLineComment ? "// " : "/*");
|
|
|
|
OS << EmitStr;
|
|
if (Flags & MTRF_Label)
|
|
OS << ": @" << Table.getLabelIndex(LabelID);
|
|
|
|
if (Flags & MTRF_Comment && !UseLineComment)
|
|
OS << "*/";
|
|
|
|
if (Flags & MTRF_JumpTarget) {
|
|
if (Flags & MTRF_Comment)
|
|
OS << " ";
|
|
OS << Table.getLabelIndex(LabelID);
|
|
}
|
|
|
|
if (Flags & MTRF_CommaFollows) {
|
|
OS << ",";
|
|
if (!LineBreakIsNextAfterThis && !(Flags & MTRF_LineBreakFollows))
|
|
OS << " ";
|
|
}
|
|
|
|
if (Flags & MTRF_LineBreakFollows)
|
|
OS << "\n";
|
|
}
|
|
|
|
MatchTable &operator<<(MatchTable &Table, const MatchTableRecord &Value) {
|
|
Table.push_back(Value);
|
|
return Table;
|
|
}
|
|
|
|
//===- Matchers -----------------------------------------------------------===//
|
|
|
|
class OperandMatcher;
|
|
class MatchAction;
|
|
class PredicateMatcher;
|
|
class RuleMatcher;
|
|
|
|
class Matcher {
|
|
public:
|
|
virtual ~Matcher() = default;
|
|
virtual void optimize() {}
|
|
virtual void emit(MatchTable &Table) = 0;
|
|
|
|
virtual bool hasFirstCondition() const = 0;
|
|
virtual const PredicateMatcher &getFirstCondition() const = 0;
|
|
virtual std::unique_ptr<PredicateMatcher> popFirstCondition() = 0;
|
|
};
|
|
|
|
MatchTable MatchTable::buildTable(ArrayRef<Matcher *> Rules,
|
|
bool WithCoverage) {
|
|
MatchTable Table(WithCoverage);
|
|
for (Matcher *Rule : Rules)
|
|
Rule->emit(Table);
|
|
|
|
return Table << MatchTable::Opcode("GIM_Reject") << MatchTable::LineBreak;
|
|
}
|
|
|
|
class GroupMatcher final : public Matcher {
|
|
/// Conditions that form a common prefix of all the matchers contained.
|
|
SmallVector<std::unique_ptr<PredicateMatcher>, 1> Conditions;
|
|
|
|
/// All the nested matchers, sharing a common prefix.
|
|
std::vector<Matcher *> Matchers;
|
|
|
|
/// An owning collection for any auxiliary matchers created while optimizing
|
|
/// nested matchers contained.
|
|
std::vector<std::unique_ptr<Matcher>> MatcherStorage;
|
|
|
|
public:
|
|
/// Add a matcher to the collection of nested matchers if it meets the
|
|
/// requirements, and return true. If it doesn't, do nothing and return false.
|
|
///
|
|
/// Expected to preserve its argument, so it could be moved out later on.
|
|
bool addMatcher(Matcher &Candidate);
|
|
|
|
/// Mark the matcher as fully-built and ensure any invariants expected by both
|
|
/// optimize() and emit(...) methods. Generally, both sequences of calls
|
|
/// are expected to lead to a sensible result:
|
|
///
|
|
/// addMatcher(...)*; finalize(); optimize(); emit(...); and
|
|
/// addMatcher(...)*; finalize(); emit(...);
|
|
///
|
|
/// or generally
|
|
///
|
|
/// addMatcher(...)*; finalize(); { optimize()*; emit(...); }*
|
|
///
|
|
/// Multiple calls to optimize() are expected to be handled gracefully, though
|
|
/// optimize() is not expected to be idempotent. Multiple calls to finalize()
|
|
/// aren't generally supported. emit(...) is expected to be non-mutating and
|
|
/// producing the exact same results upon repeated calls.
|
|
///
|
|
/// addMatcher() calls after the finalize() call are not supported.
|
|
///
|
|
/// finalize() and optimize() are both allowed to mutate the contained
|
|
/// matchers, so moving them out after finalize() is not supported.
|
|
void finalize();
|
|
void optimize() override;
|
|
void emit(MatchTable &Table) override;
|
|
|
|
/// Could be used to move out the matchers added previously, unless finalize()
|
|
/// has been already called. If any of the matchers are moved out, the group
|
|
/// becomes safe to destroy, but not safe to re-use for anything else.
|
|
iterator_range<std::vector<Matcher *>::iterator> matchers() {
|
|
return make_range(Matchers.begin(), Matchers.end());
|
|
}
|
|
size_t size() const { return Matchers.size(); }
|
|
bool empty() const { return Matchers.empty(); }
|
|
|
|
std::unique_ptr<PredicateMatcher> popFirstCondition() override {
|
|
assert(!Conditions.empty() &&
|
|
"Trying to pop a condition from a condition-less group");
|
|
std::unique_ptr<PredicateMatcher> P = std::move(Conditions.front());
|
|
Conditions.erase(Conditions.begin());
|
|
return P;
|
|
}
|
|
const PredicateMatcher &getFirstCondition() const override {
|
|
assert(!Conditions.empty() &&
|
|
"Trying to get a condition from a condition-less group");
|
|
return *Conditions.front();
|
|
}
|
|
bool hasFirstCondition() const override { return !Conditions.empty(); }
|
|
|
|
private:
|
|
/// See if a candidate matcher could be added to this group solely by
|
|
/// analyzing its first condition.
|
|
bool candidateConditionMatches(const PredicateMatcher &Predicate) const;
|
|
};
|
|
|
|
class SwitchMatcher : public Matcher {
|
|
/// All the nested matchers, representing distinct switch-cases. The first
|
|
/// conditions (as Matcher::getFirstCondition() reports) of all the nested
|
|
/// matchers must share the same type and path to a value they check, in other
|
|
/// words, be isIdenticalDownToValue, but have different values they check
|
|
/// against.
|
|
std::vector<Matcher *> Matchers;
|
|
|
|
/// The representative condition, with a type and a path (InsnVarID and OpIdx
|
|
/// in most cases) shared by all the matchers contained.
|
|
std::unique_ptr<PredicateMatcher> Condition = nullptr;
|
|
|
|
/// Temporary set used to check that the case values don't repeat within the
|
|
/// same switch.
|
|
std::set<MatchTableRecord> Values;
|
|
|
|
/// An owning collection for any auxiliary matchers created while optimizing
|
|
/// nested matchers contained.
|
|
std::vector<std::unique_ptr<Matcher>> MatcherStorage;
|
|
|
|
public:
|
|
bool addMatcher(Matcher &Candidate);
|
|
|
|
void finalize();
|
|
void emit(MatchTable &Table) override;
|
|
|
|
iterator_range<std::vector<Matcher *>::iterator> matchers() {
|
|
return make_range(Matchers.begin(), Matchers.end());
|
|
}
|
|
size_t size() const { return Matchers.size(); }
|
|
bool empty() const { return Matchers.empty(); }
|
|
|
|
std::unique_ptr<PredicateMatcher> popFirstCondition() override {
|
|
// SwitchMatcher doesn't have a common first condition for its cases, as all
|
|
// the cases only share a kind of a value (a type and a path to it) they
|
|
// match, but deliberately differ in the actual value they match.
|
|
llvm_unreachable("Trying to pop a condition from a condition-less group");
|
|
}
|
|
const PredicateMatcher &getFirstCondition() const override {
|
|
llvm_unreachable("Trying to pop a condition from a condition-less group");
|
|
}
|
|
bool hasFirstCondition() const override { return false; }
|
|
|
|
private:
|
|
/// See if the predicate type has a Switch-implementation for it.
|
|
static bool isSupportedPredicateType(const PredicateMatcher &Predicate);
|
|
|
|
bool candidateConditionMatches(const PredicateMatcher &Predicate) const;
|
|
|
|
/// emit()-helper
|
|
static void emitPredicateSpecificOpcodes(const PredicateMatcher &P,
|
|
MatchTable &Table);
|
|
};
|
|
|
|
/// Generates code to check that a match rule matches.
|
|
class RuleMatcher : public Matcher {
|
|
public:
|
|
using ActionList = std::list<std::unique_ptr<MatchAction>>;
|
|
using action_iterator = ActionList::iterator;
|
|
|
|
protected:
|
|
/// A list of matchers that all need to succeed for the current rule to match.
|
|
/// FIXME: This currently supports a single match position but could be
|
|
/// extended to support multiple positions to support div/rem fusion or
|
|
/// load-multiple instructions.
|
|
using MatchersTy = std::vector<std::unique_ptr<InstructionMatcher>> ;
|
|
MatchersTy Matchers;
|
|
|
|
/// A list of actions that need to be taken when all predicates in this rule
|
|
/// have succeeded.
|
|
ActionList Actions;
|
|
|
|
using DefinedInsnVariablesMap = std::map<InstructionMatcher *, unsigned>;
|
|
|
|
/// A map of instruction matchers to the local variables
|
|
DefinedInsnVariablesMap InsnVariableIDs;
|
|
|
|
using MutatableInsnSet = SmallPtrSet<InstructionMatcher *, 4>;
|
|
|
|
// The set of instruction matchers that have not yet been claimed for mutation
|
|
// by a BuildMI.
|
|
MutatableInsnSet MutatableInsns;
|
|
|
|
/// A map of named operands defined by the matchers that may be referenced by
|
|
/// the renderers.
|
|
StringMap<OperandMatcher *> DefinedOperands;
|
|
|
|
/// ID for the next instruction variable defined with implicitlyDefineInsnVar()
|
|
unsigned NextInsnVarID;
|
|
|
|
/// ID for the next output instruction allocated with allocateOutputInsnID()
|
|
unsigned NextOutputInsnID;
|
|
|
|
/// ID for the next temporary register ID allocated with allocateTempRegID()
|
|
unsigned NextTempRegID;
|
|
|
|
std::vector<Record *> RequiredFeatures;
|
|
std::vector<std::unique_ptr<PredicateMatcher>> EpilogueMatchers;
|
|
|
|
ArrayRef<SMLoc> SrcLoc;
|
|
|
|
typedef std::tuple<Record *, unsigned, unsigned>
|
|
DefinedComplexPatternSubOperand;
|
|
typedef StringMap<DefinedComplexPatternSubOperand>
|
|
DefinedComplexPatternSubOperandMap;
|
|
/// A map of Symbolic Names to ComplexPattern sub-operands.
|
|
DefinedComplexPatternSubOperandMap ComplexSubOperands;
|
|
|
|
uint64_t RuleID;
|
|
static uint64_t NextRuleID;
|
|
|
|
public:
|
|
RuleMatcher(ArrayRef<SMLoc> SrcLoc)
|
|
: Matchers(), Actions(), InsnVariableIDs(), MutatableInsns(),
|
|
DefinedOperands(), NextInsnVarID(0), NextOutputInsnID(0),
|
|
NextTempRegID(0), SrcLoc(SrcLoc), ComplexSubOperands(),
|
|
RuleID(NextRuleID++) {}
|
|
RuleMatcher(RuleMatcher &&Other) = default;
|
|
RuleMatcher &operator=(RuleMatcher &&Other) = default;
|
|
|
|
uint64_t getRuleID() const { return RuleID; }
|
|
|
|
InstructionMatcher &addInstructionMatcher(StringRef SymbolicName);
|
|
void addRequiredFeature(Record *Feature);
|
|
const std::vector<Record *> &getRequiredFeatures() const;
|
|
|
|
template <class Kind, class... Args> Kind &addAction(Args &&... args);
|
|
template <class Kind, class... Args>
|
|
action_iterator insertAction(action_iterator InsertPt, Args &&... args);
|
|
|
|
/// Define an instruction without emitting any code to do so.
|
|
unsigned implicitlyDefineInsnVar(InstructionMatcher &Matcher);
|
|
|
|
unsigned getInsnVarID(InstructionMatcher &InsnMatcher) const;
|
|
DefinedInsnVariablesMap::const_iterator defined_insn_vars_begin() const {
|
|
return InsnVariableIDs.begin();
|
|
}
|
|
DefinedInsnVariablesMap::const_iterator defined_insn_vars_end() const {
|
|
return InsnVariableIDs.end();
|
|
}
|
|
iterator_range<typename DefinedInsnVariablesMap::const_iterator>
|
|
defined_insn_vars() const {
|
|
return make_range(defined_insn_vars_begin(), defined_insn_vars_end());
|
|
}
|
|
|
|
MutatableInsnSet::const_iterator mutatable_insns_begin() const {
|
|
return MutatableInsns.begin();
|
|
}
|
|
MutatableInsnSet::const_iterator mutatable_insns_end() const {
|
|
return MutatableInsns.end();
|
|
}
|
|
iterator_range<typename MutatableInsnSet::const_iterator>
|
|
mutatable_insns() const {
|
|
return make_range(mutatable_insns_begin(), mutatable_insns_end());
|
|
}
|
|
void reserveInsnMatcherForMutation(InstructionMatcher *InsnMatcher) {
|
|
bool R = MutatableInsns.erase(InsnMatcher);
|
|
assert(R && "Reserving a mutatable insn that isn't available");
|
|
(void)R;
|
|
}
|
|
|
|
action_iterator actions_begin() { return Actions.begin(); }
|
|
action_iterator actions_end() { return Actions.end(); }
|
|
iterator_range<action_iterator> actions() {
|
|
return make_range(actions_begin(), actions_end());
|
|
}
|
|
|
|
void defineOperand(StringRef SymbolicName, OperandMatcher &OM);
|
|
|
|
Error defineComplexSubOperand(StringRef SymbolicName, Record *ComplexPattern,
|
|
unsigned RendererID, unsigned SubOperandID) {
|
|
if (ComplexSubOperands.count(SymbolicName))
|
|
return failedImport(
|
|
"Complex suboperand referenced more than once (Operand: " +
|
|
SymbolicName + ")");
|
|
|
|
ComplexSubOperands[SymbolicName] =
|
|
std::make_tuple(ComplexPattern, RendererID, SubOperandID);
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
Optional<DefinedComplexPatternSubOperand>
|
|
getComplexSubOperand(StringRef SymbolicName) const {
|
|
const auto &I = ComplexSubOperands.find(SymbolicName);
|
|
if (I == ComplexSubOperands.end())
|
|
return None;
|
|
return I->second;
|
|
}
|
|
|
|
InstructionMatcher &getInstructionMatcher(StringRef SymbolicName) const;
|
|
const OperandMatcher &getOperandMatcher(StringRef Name) const;
|
|
|
|
void optimize() override;
|
|
void emit(MatchTable &Table) override;
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
bool isHigherPriorityThan(const RuleMatcher &B) const;
|
|
|
|
/// Report the maximum number of temporary operands needed by the rule
|
|
/// matcher.
|
|
unsigned countRendererFns() const;
|
|
|
|
std::unique_ptr<PredicateMatcher> popFirstCondition() override;
|
|
const PredicateMatcher &getFirstCondition() const override;
|
|
LLTCodeGen getFirstConditionAsRootType();
|
|
bool hasFirstCondition() const override;
|
|
unsigned getNumOperands() const;
|
|
StringRef getOpcode() const;
|
|
|
|
// FIXME: Remove this as soon as possible
|
|
InstructionMatcher &insnmatchers_front() const { return *Matchers.front(); }
|
|
|
|
unsigned allocateOutputInsnID() { return NextOutputInsnID++; }
|
|
unsigned allocateTempRegID() { return NextTempRegID++; }
|
|
|
|
iterator_range<MatchersTy::iterator> insnmatchers() {
|
|
return make_range(Matchers.begin(), Matchers.end());
|
|
}
|
|
bool insnmatchers_empty() const { return Matchers.empty(); }
|
|
void insnmatchers_pop_front() { Matchers.erase(Matchers.begin()); }
|
|
};
|
|
|
|
uint64_t RuleMatcher::NextRuleID = 0;
|
|
|
|
using action_iterator = RuleMatcher::action_iterator;
|
|
|
|
template <class PredicateTy> class PredicateListMatcher {
|
|
private:
|
|
/// Template instantiations should specialize this to return a string to use
|
|
/// for the comment emitted when there are no predicates.
|
|
std::string getNoPredicateComment() const;
|
|
|
|
protected:
|
|
using PredicatesTy = std::deque<std::unique_ptr<PredicateTy>>;
|
|
PredicatesTy Predicates;
|
|
|
|
/// Track if the list of predicates was manipulated by one of the optimization
|
|
/// methods.
|
|
bool Optimized = false;
|
|
|
|
public:
|
|
/// Construct a new predicate and add it to the matcher.
|
|
template <class Kind, class... Args>
|
|
Optional<Kind *> addPredicate(Args &&... args);
|
|
|
|
typename PredicatesTy::iterator predicates_begin() {
|
|
return Predicates.begin();
|
|
}
|
|
typename PredicatesTy::iterator predicates_end() {
|
|
return Predicates.end();
|
|
}
|
|
iterator_range<typename PredicatesTy::iterator> predicates() {
|
|
return make_range(predicates_begin(), predicates_end());
|
|
}
|
|
typename PredicatesTy::size_type predicates_size() const {
|
|
return Predicates.size();
|
|
}
|
|
bool predicates_empty() const { return Predicates.empty(); }
|
|
|
|
std::unique_ptr<PredicateTy> predicates_pop_front() {
|
|
std::unique_ptr<PredicateTy> Front = std::move(Predicates.front());
|
|
Predicates.pop_front();
|
|
Optimized = true;
|
|
return Front;
|
|
}
|
|
|
|
void prependPredicate(std::unique_ptr<PredicateTy> &&Predicate) {
|
|
Predicates.push_front(std::move(Predicate));
|
|
}
|
|
|
|
void eraseNullPredicates() {
|
|
const auto NewEnd =
|
|
std::stable_partition(Predicates.begin(), Predicates.end(),
|
|
std::logical_not<std::unique_ptr<PredicateTy>>());
|
|
if (NewEnd != Predicates.begin()) {
|
|
Predicates.erase(Predicates.begin(), NewEnd);
|
|
Optimized = true;
|
|
}
|
|
}
|
|
|
|
/// Emit MatchTable opcodes that tests whether all the predicates are met.
|
|
template <class... Args>
|
|
void emitPredicateListOpcodes(MatchTable &Table, Args &&... args) {
|
|
if (Predicates.empty() && !Optimized) {
|
|
Table << MatchTable::Comment(getNoPredicateComment())
|
|
<< MatchTable::LineBreak;
|
|
return;
|
|
}
|
|
|
|
for (const auto &Predicate : predicates())
|
|
Predicate->emitPredicateOpcodes(Table, std::forward<Args>(args)...);
|
|
}
|
|
};
|
|
|
|
class PredicateMatcher {
|
|
public:
|
|
/// This enum is used for RTTI and also defines the priority that is given to
|
|
/// the predicate when generating the matcher code. Kinds with higher priority
|
|
/// must be tested first.
|
|
///
|
|
/// The relative priority of OPM_LLT, OPM_RegBank, and OPM_MBB do not matter
|
|
/// but OPM_Int must have priority over OPM_RegBank since constant integers
|
|
/// are represented by a virtual register defined by a G_CONSTANT instruction.
|
|
///
|
|
/// Note: The relative priority between IPM_ and OPM_ does not matter, they
|
|
/// are currently not compared between each other.
|
|
enum PredicateKind {
|
|
IPM_Opcode,
|
|
IPM_NumOperands,
|
|
IPM_ImmPredicate,
|
|
IPM_AtomicOrderingMMO,
|
|
IPM_MemoryLLTSize,
|
|
IPM_MemoryVsLLTSize,
|
|
IPM_GenericPredicate,
|
|
OPM_SameOperand,
|
|
OPM_ComplexPattern,
|
|
OPM_IntrinsicID,
|
|
OPM_Instruction,
|
|
OPM_Int,
|
|
OPM_LiteralInt,
|
|
OPM_LLT,
|
|
OPM_PointerToAny,
|
|
OPM_RegBank,
|
|
OPM_MBB,
|
|
};
|
|
|
|
protected:
|
|
PredicateKind Kind;
|
|
unsigned InsnVarID;
|
|
unsigned OpIdx;
|
|
|
|
public:
|
|
PredicateMatcher(PredicateKind Kind, unsigned InsnVarID, unsigned OpIdx = ~0)
|
|
: Kind(Kind), InsnVarID(InsnVarID), OpIdx(OpIdx) {}
|
|
|
|
unsigned getInsnVarID() const { return InsnVarID; }
|
|
unsigned getOpIdx() const { return OpIdx; }
|
|
|
|
virtual ~PredicateMatcher() = default;
|
|
/// Emit MatchTable opcodes that check the predicate for the given operand.
|
|
virtual void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const = 0;
|
|
|
|
PredicateKind getKind() const { return Kind; }
|
|
|
|
virtual bool isIdentical(const PredicateMatcher &B) const {
|
|
return B.getKind() == getKind() && InsnVarID == B.InsnVarID &&
|
|
OpIdx == B.OpIdx;
|
|
}
|
|
|
|
virtual bool isIdenticalDownToValue(const PredicateMatcher &B) const {
|
|
return hasValue() && PredicateMatcher::isIdentical(B);
|
|
}
|
|
|
|
virtual MatchTableRecord getValue() const {
|
|
assert(hasValue() && "Can not get a value of a value-less predicate!");
|
|
llvm_unreachable("Not implemented yet");
|
|
}
|
|
virtual bool hasValue() const { return false; }
|
|
|
|
/// Report the maximum number of temporary operands needed by the predicate
|
|
/// matcher.
|
|
virtual unsigned countRendererFns() const { return 0; }
|
|
};
|
|
|
|
/// Generates code to check a predicate of an operand.
|
|
///
|
|
/// Typical predicates include:
|
|
/// * Operand is a particular register.
|
|
/// * Operand is assigned a particular register bank.
|
|
/// * Operand is an MBB.
|
|
class OperandPredicateMatcher : public PredicateMatcher {
|
|
public:
|
|
OperandPredicateMatcher(PredicateKind Kind, unsigned InsnVarID,
|
|
unsigned OpIdx)
|
|
: PredicateMatcher(Kind, InsnVarID, OpIdx) {}
|
|
virtual ~OperandPredicateMatcher() {}
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
virtual bool isHigherPriorityThan(const OperandPredicateMatcher &B) const;
|
|
};
|
|
|
|
template <>
|
|
std::string
|
|
PredicateListMatcher<OperandPredicateMatcher>::getNoPredicateComment() const {
|
|
return "No operand predicates";
|
|
}
|
|
|
|
/// Generates code to check that a register operand is defined by the same exact
|
|
/// one as another.
|
|
class SameOperandMatcher : public OperandPredicateMatcher {
|
|
std::string MatchingName;
|
|
|
|
public:
|
|
SameOperandMatcher(unsigned InsnVarID, unsigned OpIdx, StringRef MatchingName)
|
|
: OperandPredicateMatcher(OPM_SameOperand, InsnVarID, OpIdx),
|
|
MatchingName(MatchingName) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_SameOperand;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override;
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
MatchingName == cast<SameOperandMatcher>(&B)->MatchingName;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is a particular LLT.
|
|
class LLTOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
LLTCodeGen Ty;
|
|
|
|
public:
|
|
static std::map<LLTCodeGen, unsigned> TypeIDValues;
|
|
|
|
static void initTypeIDValuesMap() {
|
|
TypeIDValues.clear();
|
|
|
|
unsigned ID = 0;
|
|
for (const LLTCodeGen LLTy : KnownTypes)
|
|
TypeIDValues[LLTy] = ID++;
|
|
}
|
|
|
|
LLTOperandMatcher(unsigned InsnVarID, unsigned OpIdx, const LLTCodeGen &Ty)
|
|
: OperandPredicateMatcher(OPM_LLT, InsnVarID, OpIdx), Ty(Ty) {
|
|
KnownTypes.insert(Ty);
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_LLT;
|
|
}
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
Ty == cast<LLTOperandMatcher>(&B)->Ty;
|
|
}
|
|
MatchTableRecord getValue() const override {
|
|
const auto VI = TypeIDValues.find(Ty);
|
|
if (VI == TypeIDValues.end())
|
|
return MatchTable::NamedValue(getTy().getCxxEnumValue());
|
|
return MatchTable::NamedValue(getTy().getCxxEnumValue(), VI->second);
|
|
}
|
|
bool hasValue() const override {
|
|
if (TypeIDValues.size() != KnownTypes.size())
|
|
initTypeIDValuesMap();
|
|
return TypeIDValues.count(Ty);
|
|
}
|
|
|
|
LLTCodeGen getTy() const { return Ty; }
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckType") << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(InsnVarID) << MatchTable::Comment("Op")
|
|
<< MatchTable::IntValue(OpIdx) << MatchTable::Comment("Type")
|
|
<< getValue() << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
std::map<LLTCodeGen, unsigned> LLTOperandMatcher::TypeIDValues;
|
|
|
|
/// Generates code to check that an operand is a pointer to any address space.
|
|
///
|
|
/// In SelectionDAG, the types did not describe pointers or address spaces. As a
|
|
/// result, iN is used to describe a pointer of N bits to any address space and
|
|
/// PatFrag predicates are typically used to constrain the address space. There's
|
|
/// no reliable means to derive the missing type information from the pattern so
|
|
/// imported rules must test the components of a pointer separately.
|
|
///
|
|
/// If SizeInBits is zero, then the pointer size will be obtained from the
|
|
/// subtarget.
|
|
class PointerToAnyOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
unsigned SizeInBits;
|
|
|
|
public:
|
|
PointerToAnyOperandMatcher(unsigned InsnVarID, unsigned OpIdx,
|
|
unsigned SizeInBits)
|
|
: OperandPredicateMatcher(OPM_PointerToAny, InsnVarID, OpIdx),
|
|
SizeInBits(SizeInBits) {}
|
|
|
|
static bool classof(const OperandPredicateMatcher *P) {
|
|
return P->getKind() == OPM_PointerToAny;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckPointerToAny")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::Comment("SizeInBits")
|
|
<< MatchTable::IntValue(SizeInBits) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is a particular target constant.
|
|
class ComplexPatternOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
const OperandMatcher &Operand;
|
|
const Record &TheDef;
|
|
|
|
unsigned getAllocatedTemporariesBaseID() const;
|
|
|
|
public:
|
|
bool isIdentical(const PredicateMatcher &B) const override { return false; }
|
|
|
|
ComplexPatternOperandMatcher(unsigned InsnVarID, unsigned OpIdx,
|
|
const OperandMatcher &Operand,
|
|
const Record &TheDef)
|
|
: OperandPredicateMatcher(OPM_ComplexPattern, InsnVarID, OpIdx),
|
|
Operand(Operand), TheDef(TheDef) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_ComplexPattern;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
unsigned ID = getAllocatedTemporariesBaseID();
|
|
Table << MatchTable::Opcode("GIM_CheckComplexPattern")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::Comment("Renderer") << MatchTable::IntValue(ID)
|
|
<< MatchTable::NamedValue(("GICP_" + TheDef.getName()).str())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
unsigned countRendererFns() const override {
|
|
return 1;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is in a particular register bank.
|
|
class RegisterBankOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
const CodeGenRegisterClass &RC;
|
|
|
|
public:
|
|
RegisterBankOperandMatcher(unsigned InsnVarID, unsigned OpIdx,
|
|
const CodeGenRegisterClass &RC)
|
|
: OperandPredicateMatcher(OPM_RegBank, InsnVarID, OpIdx), RC(RC) {}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
RC.getDef() == cast<RegisterBankOperandMatcher>(&B)->RC.getDef();
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_RegBank;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckRegBankForClass")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::Comment("RC")
|
|
<< MatchTable::NamedValue(RC.getQualifiedName() + "RegClassID")
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is a basic block.
|
|
class MBBOperandMatcher : public OperandPredicateMatcher {
|
|
public:
|
|
MBBOperandMatcher(unsigned InsnVarID, unsigned OpIdx)
|
|
: OperandPredicateMatcher(OPM_MBB, InsnVarID, OpIdx) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_MBB;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckIsMBB") << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(InsnVarID) << MatchTable::Comment("Op")
|
|
<< MatchTable::IntValue(OpIdx) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is a G_CONSTANT with a particular
|
|
/// int.
|
|
class ConstantIntOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
int64_t Value;
|
|
|
|
public:
|
|
ConstantIntOperandMatcher(unsigned InsnVarID, unsigned OpIdx, int64_t Value)
|
|
: OperandPredicateMatcher(OPM_Int, InsnVarID, OpIdx), Value(Value) {}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
Value == cast<ConstantIntOperandMatcher>(&B)->Value;
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_Int;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckConstantInt")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::IntValue(Value) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is a raw int (where MO.isImm() or
|
|
/// MO.isCImm() is true).
|
|
class LiteralIntOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
int64_t Value;
|
|
|
|
public:
|
|
LiteralIntOperandMatcher(unsigned InsnVarID, unsigned OpIdx, int64_t Value)
|
|
: OperandPredicateMatcher(OPM_LiteralInt, InsnVarID, OpIdx),
|
|
Value(Value) {}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
Value == cast<LiteralIntOperandMatcher>(&B)->Value;
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_LiteralInt;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckLiteralInt")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::IntValue(Value) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that an operand is an intrinsic ID.
|
|
class IntrinsicIDOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
const CodeGenIntrinsic *II;
|
|
|
|
public:
|
|
IntrinsicIDOperandMatcher(unsigned InsnVarID, unsigned OpIdx,
|
|
const CodeGenIntrinsic *II)
|
|
: OperandPredicateMatcher(OPM_IntrinsicID, InsnVarID, OpIdx), II(II) {}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return OperandPredicateMatcher::isIdentical(B) &&
|
|
II == cast<IntrinsicIDOperandMatcher>(&B)->II;
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_IntrinsicID;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckIntrinsicID")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::NamedValue("Intrinsic::" + II->EnumName)
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that a set of predicates match for a particular
|
|
/// operand.
|
|
class OperandMatcher : public PredicateListMatcher<OperandPredicateMatcher> {
|
|
protected:
|
|
InstructionMatcher &Insn;
|
|
unsigned OpIdx;
|
|
std::string SymbolicName;
|
|
|
|
/// The index of the first temporary variable allocated to this operand. The
|
|
/// number of allocated temporaries can be found with
|
|
/// countRendererFns().
|
|
unsigned AllocatedTemporariesBaseID;
|
|
|
|
public:
|
|
OperandMatcher(InstructionMatcher &Insn, unsigned OpIdx,
|
|
const std::string &SymbolicName,
|
|
unsigned AllocatedTemporariesBaseID)
|
|
: Insn(Insn), OpIdx(OpIdx), SymbolicName(SymbolicName),
|
|
AllocatedTemporariesBaseID(AllocatedTemporariesBaseID) {}
|
|
|
|
bool hasSymbolicName() const { return !SymbolicName.empty(); }
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
void setSymbolicName(StringRef Name) {
|
|
assert(SymbolicName.empty() && "Operand already has a symbolic name");
|
|
SymbolicName = Name;
|
|
}
|
|
|
|
/// Construct a new operand predicate and add it to the matcher.
|
|
template <class Kind, class... Args>
|
|
Optional<Kind *> addPredicate(Args &&... args) {
|
|
if (isSameAsAnotherOperand())
|
|
return None;
|
|
Predicates.emplace_back(llvm::make_unique<Kind>(
|
|
getInsnVarID(), getOpIdx(), std::forward<Args>(args)...));
|
|
return static_cast<Kind *>(Predicates.back().get());
|
|
}
|
|
|
|
unsigned getOpIdx() const { return OpIdx; }
|
|
unsigned getInsnVarID() const;
|
|
|
|
std::string getOperandExpr(unsigned InsnVarID) const {
|
|
return "State.MIs[" + llvm::to_string(InsnVarID) + "]->getOperand(" +
|
|
llvm::to_string(OpIdx) + ")";
|
|
}
|
|
|
|
InstructionMatcher &getInstructionMatcher() const { return Insn; }
|
|
|
|
Error addTypeCheckPredicate(const TypeSetByHwMode &VTy,
|
|
bool OperandIsAPointer);
|
|
|
|
/// Emit MatchTable opcodes that test whether the instruction named in
|
|
/// InsnVarID matches all the predicates and all the operands.
|
|
void emitPredicateOpcodes(MatchTable &Table, RuleMatcher &Rule) {
|
|
if (!Optimized) {
|
|
std::string Comment;
|
|
raw_string_ostream CommentOS(Comment);
|
|
CommentOS << "MIs[" << getInsnVarID() << "] ";
|
|
if (SymbolicName.empty())
|
|
CommentOS << "Operand " << OpIdx;
|
|
else
|
|
CommentOS << SymbolicName;
|
|
Table << MatchTable::Comment(CommentOS.str()) << MatchTable::LineBreak;
|
|
}
|
|
|
|
emitPredicateListOpcodes(Table, Rule);
|
|
}
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
bool isHigherPriorityThan(OperandMatcher &B) {
|
|
// Operand matchers involving more predicates have higher priority.
|
|
if (predicates_size() > B.predicates_size())
|
|
return true;
|
|
if (predicates_size() < B.predicates_size())
|
|
return false;
|
|
|
|
// This assumes that predicates are added in a consistent order.
|
|
for (auto &&Predicate : zip(predicates(), B.predicates())) {
|
|
if (std::get<0>(Predicate)->isHigherPriorityThan(*std::get<1>(Predicate)))
|
|
return true;
|
|
if (std::get<1>(Predicate)->isHigherPriorityThan(*std::get<0>(Predicate)))
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
/// Report the maximum number of temporary operands needed by the operand
|
|
/// matcher.
|
|
unsigned countRendererFns() {
|
|
return std::accumulate(
|
|
predicates().begin(), predicates().end(), 0,
|
|
[](unsigned A,
|
|
const std::unique_ptr<OperandPredicateMatcher> &Predicate) {
|
|
return A + Predicate->countRendererFns();
|
|
});
|
|
}
|
|
|
|
unsigned getAllocatedTemporariesBaseID() const {
|
|
return AllocatedTemporariesBaseID;
|
|
}
|
|
|
|
bool isSameAsAnotherOperand() {
|
|
for (const auto &Predicate : predicates())
|
|
if (isa<SameOperandMatcher>(Predicate))
|
|
return true;
|
|
return false;
|
|
}
|
|
};
|
|
|
|
Error OperandMatcher::addTypeCheckPredicate(const TypeSetByHwMode &VTy,
|
|
bool OperandIsAPointer) {
|
|
if (!VTy.isMachineValueType())
|
|
return failedImport("unsupported typeset");
|
|
|
|
if (VTy.getMachineValueType() == MVT::iPTR && OperandIsAPointer) {
|
|
addPredicate<PointerToAnyOperandMatcher>(0);
|
|
return Error::success();
|
|
}
|
|
|
|
auto OpTyOrNone = MVTToLLT(VTy.getMachineValueType().SimpleTy);
|
|
if (!OpTyOrNone)
|
|
return failedImport("unsupported type");
|
|
|
|
if (OperandIsAPointer)
|
|
addPredicate<PointerToAnyOperandMatcher>(OpTyOrNone->get().getSizeInBits());
|
|
else if (VTy.isPointer())
|
|
addPredicate<LLTOperandMatcher>(LLT::pointer(VTy.getPtrAddrSpace(),
|
|
OpTyOrNone->get().getSizeInBits()));
|
|
else
|
|
addPredicate<LLTOperandMatcher>(*OpTyOrNone);
|
|
return Error::success();
|
|
}
|
|
|
|
unsigned ComplexPatternOperandMatcher::getAllocatedTemporariesBaseID() const {
|
|
return Operand.getAllocatedTemporariesBaseID();
|
|
}
|
|
|
|
/// Generates code to check a predicate on an instruction.
|
|
///
|
|
/// Typical predicates include:
|
|
/// * The opcode of the instruction is a particular value.
|
|
/// * The nsw/nuw flag is/isn't set.
|
|
class InstructionPredicateMatcher : public PredicateMatcher {
|
|
public:
|
|
InstructionPredicateMatcher(PredicateKind Kind, unsigned InsnVarID)
|
|
: PredicateMatcher(Kind, InsnVarID) {}
|
|
virtual ~InstructionPredicateMatcher() {}
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
virtual bool
|
|
isHigherPriorityThan(const InstructionPredicateMatcher &B) const {
|
|
return Kind < B.Kind;
|
|
};
|
|
};
|
|
|
|
template <>
|
|
std::string
|
|
PredicateListMatcher<PredicateMatcher>::getNoPredicateComment() const {
|
|
return "No instruction predicates";
|
|
}
|
|
|
|
/// Generates code to check the opcode of an instruction.
|
|
class InstructionOpcodeMatcher : public InstructionPredicateMatcher {
|
|
protected:
|
|
const CodeGenInstruction *I;
|
|
|
|
static DenseMap<const CodeGenInstruction *, unsigned> OpcodeValues;
|
|
|
|
public:
|
|
static void initOpcodeValuesMap(const CodeGenTarget &Target) {
|
|
OpcodeValues.clear();
|
|
|
|
unsigned OpcodeValue = 0;
|
|
for (const CodeGenInstruction *I : Target.getInstructionsByEnumValue())
|
|
OpcodeValues[I] = OpcodeValue++;
|
|
}
|
|
|
|
InstructionOpcodeMatcher(unsigned InsnVarID, const CodeGenInstruction *I)
|
|
: InstructionPredicateMatcher(IPM_Opcode, InsnVarID), I(I) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_Opcode;
|
|
}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
I == cast<InstructionOpcodeMatcher>(&B)->I;
|
|
}
|
|
MatchTableRecord getValue() const override {
|
|
const auto VI = OpcodeValues.find(I);
|
|
if (VI != OpcodeValues.end())
|
|
return MatchTable::NamedValue(I->Namespace, I->TheDef->getName(),
|
|
VI->second);
|
|
return MatchTable::NamedValue(I->Namespace, I->TheDef->getName());
|
|
}
|
|
bool hasValue() const override { return OpcodeValues.count(I); }
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckOpcode") << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(InsnVarID) << getValue()
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
bool
|
|
isHigherPriorityThan(const InstructionPredicateMatcher &B) const override {
|
|
if (InstructionPredicateMatcher::isHigherPriorityThan(B))
|
|
return true;
|
|
if (B.InstructionPredicateMatcher::isHigherPriorityThan(*this))
|
|
return false;
|
|
|
|
// Prioritize opcodes for cosmetic reasons in the generated source. Although
|
|
// this is cosmetic at the moment, we may want to drive a similar ordering
|
|
// using instruction frequency information to improve compile time.
|
|
if (const InstructionOpcodeMatcher *BO =
|
|
dyn_cast<InstructionOpcodeMatcher>(&B))
|
|
return I->TheDef->getName() < BO->I->TheDef->getName();
|
|
|
|
return false;
|
|
};
|
|
|
|
bool isConstantInstruction() const {
|
|
return I->TheDef->getName() == "G_CONSTANT";
|
|
}
|
|
|
|
StringRef getOpcode() const { return I->TheDef->getName(); }
|
|
unsigned getNumOperands() const { return I->Operands.size(); }
|
|
|
|
StringRef getOperandType(unsigned OpIdx) const {
|
|
return I->Operands[OpIdx].OperandType;
|
|
}
|
|
};
|
|
|
|
DenseMap<const CodeGenInstruction *, unsigned>
|
|
InstructionOpcodeMatcher::OpcodeValues;
|
|
|
|
class InstructionNumOperandsMatcher final : public InstructionPredicateMatcher {
|
|
unsigned NumOperands = 0;
|
|
|
|
public:
|
|
InstructionNumOperandsMatcher(unsigned InsnVarID, unsigned NumOperands)
|
|
: InstructionPredicateMatcher(IPM_NumOperands, InsnVarID),
|
|
NumOperands(NumOperands) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_NumOperands;
|
|
}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
NumOperands == cast<InstructionNumOperandsMatcher>(&B)->NumOperands;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckNumOperands")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Expected")
|
|
<< MatchTable::IntValue(NumOperands) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that this instruction is a constant whose value
|
|
/// meets an immediate predicate.
|
|
///
|
|
/// Immediates are slightly odd since they are typically used like an operand
|
|
/// but are represented as an operator internally. We typically write simm8:$src
|
|
/// in a tablegen pattern, but this is just syntactic sugar for
|
|
/// (imm:i32)<<P:Predicate_simm8>>:$imm which more directly describes the nodes
|
|
/// that will be matched and the predicate (which is attached to the imm
|
|
/// operator) that will be tested. In SelectionDAG this describes a
|
|
/// ConstantSDNode whose internal value will be tested using the simm8 predicate.
|
|
///
|
|
/// The corresponding GlobalISel representation is %1 = G_CONSTANT iN Value. In
|
|
/// this representation, the immediate could be tested with an
|
|
/// InstructionMatcher, InstructionOpcodeMatcher, OperandMatcher, and a
|
|
/// OperandPredicateMatcher-subclass to check the Value meets the predicate but
|
|
/// there are two implementation issues with producing that matcher
|
|
/// configuration from the SelectionDAG pattern:
|
|
/// * ImmLeaf is a PatFrag whose root is an InstructionMatcher. This means that
|
|
/// were we to sink the immediate predicate to the operand we would have to
|
|
/// have two partial implementations of PatFrag support, one for immediates
|
|
/// and one for non-immediates.
|
|
/// * At the point we handle the predicate, the OperandMatcher hasn't been
|
|
/// created yet. If we were to sink the predicate to the OperandMatcher we
|
|
/// would also have to complicate (or duplicate) the code that descends and
|
|
/// creates matchers for the subtree.
|
|
/// Overall, it's simpler to handle it in the place it was found.
|
|
class InstructionImmPredicateMatcher : public InstructionPredicateMatcher {
|
|
protected:
|
|
TreePredicateFn Predicate;
|
|
|
|
public:
|
|
InstructionImmPredicateMatcher(unsigned InsnVarID,
|
|
const TreePredicateFn &Predicate)
|
|
: InstructionPredicateMatcher(IPM_ImmPredicate, InsnVarID),
|
|
Predicate(Predicate) {}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
Predicate.getOrigPatFragRecord() ==
|
|
cast<InstructionImmPredicateMatcher>(&B)
|
|
->Predicate.getOrigPatFragRecord();
|
|
}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_ImmPredicate;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode(getMatchOpcodeForPredicate(Predicate))
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("Predicate")
|
|
<< MatchTable::NamedValue(getEnumNameForPredicate(Predicate))
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that a memory instruction has a atomic ordering
|
|
/// MachineMemoryOperand.
|
|
class AtomicOrderingMMOPredicateMatcher : public InstructionPredicateMatcher {
|
|
public:
|
|
enum AOComparator {
|
|
AO_Exactly,
|
|
AO_OrStronger,
|
|
AO_WeakerThan,
|
|
};
|
|
|
|
protected:
|
|
StringRef Order;
|
|
AOComparator Comparator;
|
|
|
|
public:
|
|
AtomicOrderingMMOPredicateMatcher(unsigned InsnVarID, StringRef Order,
|
|
AOComparator Comparator = AO_Exactly)
|
|
: InstructionPredicateMatcher(IPM_AtomicOrderingMMO, InsnVarID),
|
|
Order(Order), Comparator(Comparator) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_AtomicOrderingMMO;
|
|
}
|
|
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
if (!InstructionPredicateMatcher::isIdentical(B))
|
|
return false;
|
|
const auto &R = *cast<AtomicOrderingMMOPredicateMatcher>(&B);
|
|
return Order == R.Order && Comparator == R.Comparator;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
StringRef Opcode = "GIM_CheckAtomicOrdering";
|
|
|
|
if (Comparator == AO_OrStronger)
|
|
Opcode = "GIM_CheckAtomicOrderingOrStrongerThan";
|
|
if (Comparator == AO_WeakerThan)
|
|
Opcode = "GIM_CheckAtomicOrderingWeakerThan";
|
|
|
|
Table << MatchTable::Opcode(Opcode) << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(InsnVarID) << MatchTable::Comment("Order")
|
|
<< MatchTable::NamedValue(("(int64_t)AtomicOrdering::" + Order).str())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that the size of an MMO is exactly N bytes.
|
|
class MemorySizePredicateMatcher : public InstructionPredicateMatcher {
|
|
protected:
|
|
unsigned MMOIdx;
|
|
uint64_t Size;
|
|
|
|
public:
|
|
MemorySizePredicateMatcher(unsigned InsnVarID, unsigned MMOIdx, unsigned Size)
|
|
: InstructionPredicateMatcher(IPM_MemoryLLTSize, InsnVarID),
|
|
MMOIdx(MMOIdx), Size(Size) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_MemoryLLTSize;
|
|
}
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
MMOIdx == cast<MemorySizePredicateMatcher>(&B)->MMOIdx &&
|
|
Size == cast<MemorySizePredicateMatcher>(&B)->Size;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckMemorySizeEqualTo")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("MMO") << MatchTable::IntValue(MMOIdx)
|
|
<< MatchTable::Comment("Size") << MatchTable::IntValue(Size)
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that the size of an MMO is less-than, equal-to, or
|
|
/// greater than a given LLT.
|
|
class MemoryVsLLTSizePredicateMatcher : public InstructionPredicateMatcher {
|
|
public:
|
|
enum RelationKind {
|
|
GreaterThan,
|
|
EqualTo,
|
|
LessThan,
|
|
};
|
|
|
|
protected:
|
|
unsigned MMOIdx;
|
|
RelationKind Relation;
|
|
unsigned OpIdx;
|
|
|
|
public:
|
|
MemoryVsLLTSizePredicateMatcher(unsigned InsnVarID, unsigned MMOIdx,
|
|
enum RelationKind Relation,
|
|
unsigned OpIdx)
|
|
: InstructionPredicateMatcher(IPM_MemoryVsLLTSize, InsnVarID),
|
|
MMOIdx(MMOIdx), Relation(Relation), OpIdx(OpIdx) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == IPM_MemoryVsLLTSize;
|
|
}
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
MMOIdx == cast<MemoryVsLLTSizePredicateMatcher>(&B)->MMOIdx &&
|
|
Relation == cast<MemoryVsLLTSizePredicateMatcher>(&B)->Relation &&
|
|
OpIdx == cast<MemoryVsLLTSizePredicateMatcher>(&B)->OpIdx;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode(Relation == EqualTo
|
|
? "GIM_CheckMemorySizeEqualToLLT"
|
|
: Relation == GreaterThan
|
|
? "GIM_CheckMemorySizeGreaterThanLLT"
|
|
: "GIM_CheckMemorySizeLessThanLLT")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("MMO") << MatchTable::IntValue(MMOIdx)
|
|
<< MatchTable::Comment("OpIdx") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check an arbitrary C++ instruction predicate.
|
|
class GenericInstructionPredicateMatcher : public InstructionPredicateMatcher {
|
|
protected:
|
|
TreePredicateFn Predicate;
|
|
|
|
public:
|
|
GenericInstructionPredicateMatcher(unsigned InsnVarID,
|
|
TreePredicateFn Predicate)
|
|
: InstructionPredicateMatcher(IPM_GenericPredicate, InsnVarID),
|
|
Predicate(Predicate) {}
|
|
|
|
static bool classof(const InstructionPredicateMatcher *P) {
|
|
return P->getKind() == IPM_GenericPredicate;
|
|
}
|
|
bool isIdentical(const PredicateMatcher &B) const override {
|
|
return InstructionPredicateMatcher::isIdentical(B) &&
|
|
Predicate ==
|
|
static_cast<const GenericInstructionPredicateMatcher &>(B)
|
|
.Predicate;
|
|
}
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIM_CheckCxxInsnPredicate")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("FnId")
|
|
<< MatchTable::NamedValue(getEnumNameForPredicate(Predicate))
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to check that a set of predicates and operands match for a
|
|
/// particular instruction.
|
|
///
|
|
/// Typical predicates include:
|
|
/// * Has a specific opcode.
|
|
/// * Has an nsw/nuw flag or doesn't.
|
|
class InstructionMatcher final : public PredicateListMatcher<PredicateMatcher> {
|
|
protected:
|
|
typedef std::vector<std::unique_ptr<OperandMatcher>> OperandVec;
|
|
|
|
RuleMatcher &Rule;
|
|
|
|
/// The operands to match. All rendered operands must be present even if the
|
|
/// condition is always true.
|
|
OperandVec Operands;
|
|
bool NumOperandsCheck = true;
|
|
|
|
std::string SymbolicName;
|
|
unsigned InsnVarID;
|
|
|
|
public:
|
|
InstructionMatcher(RuleMatcher &Rule, StringRef SymbolicName)
|
|
: Rule(Rule), SymbolicName(SymbolicName) {
|
|
// We create a new instruction matcher.
|
|
// Get a new ID for that instruction.
|
|
InsnVarID = Rule.implicitlyDefineInsnVar(*this);
|
|
}
|
|
|
|
/// Construct a new instruction predicate and add it to the matcher.
|
|
template <class Kind, class... Args>
|
|
Optional<Kind *> addPredicate(Args &&... args) {
|
|
Predicates.emplace_back(
|
|
llvm::make_unique<Kind>(getInsnVarID(), std::forward<Args>(args)...));
|
|
return static_cast<Kind *>(Predicates.back().get());
|
|
}
|
|
|
|
RuleMatcher &getRuleMatcher() const { return Rule; }
|
|
|
|
unsigned getInsnVarID() const { return InsnVarID; }
|
|
|
|
/// Add an operand to the matcher.
|
|
OperandMatcher &addOperand(unsigned OpIdx, const std::string &SymbolicName,
|
|
unsigned AllocatedTemporariesBaseID) {
|
|
Operands.emplace_back(new OperandMatcher(*this, OpIdx, SymbolicName,
|
|
AllocatedTemporariesBaseID));
|
|
if (!SymbolicName.empty())
|
|
Rule.defineOperand(SymbolicName, *Operands.back());
|
|
|
|
return *Operands.back();
|
|
}
|
|
|
|
OperandMatcher &getOperand(unsigned OpIdx) {
|
|
auto I = std::find_if(Operands.begin(), Operands.end(),
|
|
[&OpIdx](const std::unique_ptr<OperandMatcher> &X) {
|
|
return X->getOpIdx() == OpIdx;
|
|
});
|
|
if (I != Operands.end())
|
|
return **I;
|
|
llvm_unreachable("Failed to lookup operand");
|
|
}
|
|
|
|
StringRef getSymbolicName() const { return SymbolicName; }
|
|
unsigned getNumOperands() const { return Operands.size(); }
|
|
OperandVec::iterator operands_begin() { return Operands.begin(); }
|
|
OperandVec::iterator operands_end() { return Operands.end(); }
|
|
iterator_range<OperandVec::iterator> operands() {
|
|
return make_range(operands_begin(), operands_end());
|
|
}
|
|
OperandVec::const_iterator operands_begin() const { return Operands.begin(); }
|
|
OperandVec::const_iterator operands_end() const { return Operands.end(); }
|
|
iterator_range<OperandVec::const_iterator> operands() const {
|
|
return make_range(operands_begin(), operands_end());
|
|
}
|
|
bool operands_empty() const { return Operands.empty(); }
|
|
|
|
void pop_front() { Operands.erase(Operands.begin()); }
|
|
|
|
void optimize();
|
|
|
|
/// Emit MatchTable opcodes that test whether the instruction named in
|
|
/// InsnVarName matches all the predicates and all the operands.
|
|
void emitPredicateOpcodes(MatchTable &Table, RuleMatcher &Rule) {
|
|
if (NumOperandsCheck)
|
|
InstructionNumOperandsMatcher(InsnVarID, getNumOperands())
|
|
.emitPredicateOpcodes(Table, Rule);
|
|
|
|
emitPredicateListOpcodes(Table, Rule);
|
|
|
|
for (const auto &Operand : Operands)
|
|
Operand->emitPredicateOpcodes(Table, Rule);
|
|
}
|
|
|
|
/// Compare the priority of this object and B.
|
|
///
|
|
/// Returns true if this object is more important than B.
|
|
bool isHigherPriorityThan(InstructionMatcher &B) {
|
|
// Instruction matchers involving more operands have higher priority.
|
|
if (Operands.size() > B.Operands.size())
|
|
return true;
|
|
if (Operands.size() < B.Operands.size())
|
|
return false;
|
|
|
|
for (auto &&P : zip(predicates(), B.predicates())) {
|
|
auto L = static_cast<InstructionPredicateMatcher *>(std::get<0>(P).get());
|
|
auto R = static_cast<InstructionPredicateMatcher *>(std::get<1>(P).get());
|
|
if (L->isHigherPriorityThan(*R))
|
|
return true;
|
|
if (R->isHigherPriorityThan(*L))
|
|
return false;
|
|
}
|
|
|
|
for (const auto &Operand : zip(Operands, B.Operands)) {
|
|
if (std::get<0>(Operand)->isHigherPriorityThan(*std::get<1>(Operand)))
|
|
return true;
|
|
if (std::get<1>(Operand)->isHigherPriorityThan(*std::get<0>(Operand)))
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
/// Report the maximum number of temporary operands needed by the instruction
|
|
/// matcher.
|
|
unsigned countRendererFns() {
|
|
return std::accumulate(
|
|
predicates().begin(), predicates().end(), 0,
|
|
[](unsigned A,
|
|
const std::unique_ptr<PredicateMatcher> &Predicate) {
|
|
return A + Predicate->countRendererFns();
|
|
}) +
|
|
std::accumulate(
|
|
Operands.begin(), Operands.end(), 0,
|
|
[](unsigned A, const std::unique_ptr<OperandMatcher> &Operand) {
|
|
return A + Operand->countRendererFns();
|
|
});
|
|
}
|
|
|
|
InstructionOpcodeMatcher &getOpcodeMatcher() {
|
|
for (auto &P : predicates())
|
|
if (auto *OpMatcher = dyn_cast<InstructionOpcodeMatcher>(P.get()))
|
|
return *OpMatcher;
|
|
llvm_unreachable("Didn't find an opcode matcher");
|
|
}
|
|
|
|
bool isConstantInstruction() {
|
|
return getOpcodeMatcher().isConstantInstruction();
|
|
}
|
|
|
|
StringRef getOpcode() { return getOpcodeMatcher().getOpcode(); }
|
|
};
|
|
|
|
StringRef RuleMatcher::getOpcode() const {
|
|
return Matchers.front()->getOpcode();
|
|
}
|
|
|
|
unsigned RuleMatcher::getNumOperands() const {
|
|
return Matchers.front()->getNumOperands();
|
|
}
|
|
|
|
LLTCodeGen RuleMatcher::getFirstConditionAsRootType() {
|
|
InstructionMatcher &InsnMatcher = *Matchers.front();
|
|
if (!InsnMatcher.predicates_empty())
|
|
if (const auto *TM =
|
|
dyn_cast<LLTOperandMatcher>(&**InsnMatcher.predicates_begin()))
|
|
if (TM->getInsnVarID() == 0 && TM->getOpIdx() == 0)
|
|
return TM->getTy();
|
|
return {};
|
|
}
|
|
|
|
/// Generates code to check that the operand is a register defined by an
|
|
/// instruction that matches the given instruction matcher.
|
|
///
|
|
/// For example, the pattern:
|
|
/// (set $dst, (G_MUL (G_ADD $src1, $src2), $src3))
|
|
/// would use an InstructionOperandMatcher for operand 1 of the G_MUL to match
|
|
/// the:
|
|
/// (G_ADD $src1, $src2)
|
|
/// subpattern.
|
|
class InstructionOperandMatcher : public OperandPredicateMatcher {
|
|
protected:
|
|
std::unique_ptr<InstructionMatcher> InsnMatcher;
|
|
|
|
public:
|
|
InstructionOperandMatcher(unsigned InsnVarID, unsigned OpIdx,
|
|
RuleMatcher &Rule, StringRef SymbolicName)
|
|
: OperandPredicateMatcher(OPM_Instruction, InsnVarID, OpIdx),
|
|
InsnMatcher(new InstructionMatcher(Rule, SymbolicName)) {}
|
|
|
|
static bool classof(const PredicateMatcher *P) {
|
|
return P->getKind() == OPM_Instruction;
|
|
}
|
|
|
|
InstructionMatcher &getInsnMatcher() const { return *InsnMatcher; }
|
|
|
|
void emitCaptureOpcodes(MatchTable &Table, RuleMatcher &Rule) const {
|
|
const unsigned NewInsnVarID = InsnMatcher->getInsnVarID();
|
|
Table << MatchTable::Opcode("GIM_RecordInsn")
|
|
<< MatchTable::Comment("DefineMI")
|
|
<< MatchTable::IntValue(NewInsnVarID) << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(getInsnVarID())
|
|
<< MatchTable::Comment("OpIdx") << MatchTable::IntValue(getOpIdx())
|
|
<< MatchTable::Comment("MIs[" + llvm::to_string(NewInsnVarID) + "]")
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
void emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const override {
|
|
emitCaptureOpcodes(Table, Rule);
|
|
InsnMatcher->emitPredicateOpcodes(Table, Rule);
|
|
}
|
|
|
|
bool isHigherPriorityThan(const OperandPredicateMatcher &B) const override {
|
|
if (OperandPredicateMatcher::isHigherPriorityThan(B))
|
|
return true;
|
|
if (B.OperandPredicateMatcher::isHigherPriorityThan(*this))
|
|
return false;
|
|
|
|
if (const InstructionOperandMatcher *BP =
|
|
dyn_cast<InstructionOperandMatcher>(&B))
|
|
if (InsnMatcher->isHigherPriorityThan(*BP->InsnMatcher))
|
|
return true;
|
|
return false;
|
|
}
|
|
};
|
|
|
|
void InstructionMatcher::optimize() {
|
|
SmallVector<std::unique_ptr<PredicateMatcher>, 8> Stash;
|
|
const auto &OpcMatcher = getOpcodeMatcher();
|
|
|
|
Stash.push_back(predicates_pop_front());
|
|
if (Stash.back().get() == &OpcMatcher) {
|
|
if (NumOperandsCheck && OpcMatcher.getNumOperands() < getNumOperands())
|
|
Stash.emplace_back(
|
|
new InstructionNumOperandsMatcher(InsnVarID, getNumOperands()));
|
|
NumOperandsCheck = false;
|
|
|
|
for (auto &OM : Operands)
|
|
for (auto &OP : OM->predicates())
|
|
if (isa<IntrinsicIDOperandMatcher>(OP)) {
|
|
Stash.push_back(std::move(OP));
|
|
OM->eraseNullPredicates();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (InsnVarID > 0) {
|
|
assert(!Operands.empty() && "Nested instruction is expected to def a vreg");
|
|
for (auto &OP : Operands[0]->predicates())
|
|
OP.reset();
|
|
Operands[0]->eraseNullPredicates();
|
|
}
|
|
for (auto &OM : Operands) {
|
|
for (auto &OP : OM->predicates())
|
|
if (isa<LLTOperandMatcher>(OP))
|
|
Stash.push_back(std::move(OP));
|
|
OM->eraseNullPredicates();
|
|
}
|
|
while (!Stash.empty())
|
|
prependPredicate(Stash.pop_back_val());
|
|
}
|
|
|
|
//===- Actions ------------------------------------------------------------===//
|
|
class OperandRenderer {
|
|
public:
|
|
enum RendererKind {
|
|
OR_Copy,
|
|
OR_CopyOrAddZeroReg,
|
|
OR_CopySubReg,
|
|
OR_CopyConstantAsImm,
|
|
OR_CopyFConstantAsFPImm,
|
|
OR_Imm,
|
|
OR_Register,
|
|
OR_TempRegister,
|
|
OR_ComplexPattern,
|
|
OR_Custom
|
|
};
|
|
|
|
protected:
|
|
RendererKind Kind;
|
|
|
|
public:
|
|
OperandRenderer(RendererKind Kind) : Kind(Kind) {}
|
|
virtual ~OperandRenderer() {}
|
|
|
|
RendererKind getKind() const { return Kind; }
|
|
|
|
virtual void emitRenderOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const = 0;
|
|
};
|
|
|
|
/// A CopyRenderer emits code to copy a single operand from an existing
|
|
/// instruction to the one being built.
|
|
class CopyRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned NewInsnID;
|
|
/// The name of the operand.
|
|
const StringRef SymbolicName;
|
|
|
|
public:
|
|
CopyRenderer(unsigned NewInsnID, StringRef SymbolicName)
|
|
: OperandRenderer(OR_Copy), NewInsnID(NewInsnID),
|
|
SymbolicName(SymbolicName) {
|
|
assert(!SymbolicName.empty() && "Cannot copy from an unspecified source");
|
|
}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_Copy;
|
|
}
|
|
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
const OperandMatcher &Operand = Rule.getOperandMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(Operand.getInstructionMatcher());
|
|
Table << MatchTable::Opcode("GIR_Copy") << MatchTable::Comment("NewInsnID")
|
|
<< MatchTable::IntValue(NewInsnID) << MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID) << MatchTable::Comment("OpIdx")
|
|
<< MatchTable::IntValue(Operand.getOpIdx())
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// A CopyOrAddZeroRegRenderer emits code to copy a single operand from an
|
|
/// existing instruction to the one being built. If the operand turns out to be
|
|
/// a 'G_CONSTANT 0' then it replaces the operand with a zero register.
|
|
class CopyOrAddZeroRegRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned NewInsnID;
|
|
/// The name of the operand.
|
|
const StringRef SymbolicName;
|
|
const Record *ZeroRegisterDef;
|
|
|
|
public:
|
|
CopyOrAddZeroRegRenderer(unsigned NewInsnID,
|
|
StringRef SymbolicName, Record *ZeroRegisterDef)
|
|
: OperandRenderer(OR_CopyOrAddZeroReg), NewInsnID(NewInsnID),
|
|
SymbolicName(SymbolicName), ZeroRegisterDef(ZeroRegisterDef) {
|
|
assert(!SymbolicName.empty() && "Cannot copy from an unspecified source");
|
|
}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_CopyOrAddZeroReg;
|
|
}
|
|
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
const OperandMatcher &Operand = Rule.getOperandMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(Operand.getInstructionMatcher());
|
|
Table << MatchTable::Opcode("GIR_CopyOrAddZeroReg")
|
|
<< MatchTable::Comment("NewInsnID") << MatchTable::IntValue(NewInsnID)
|
|
<< MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID) << MatchTable::Comment("OpIdx")
|
|
<< MatchTable::IntValue(Operand.getOpIdx())
|
|
<< MatchTable::NamedValue(
|
|
(ZeroRegisterDef->getValue("Namespace")
|
|
? ZeroRegisterDef->getValueAsString("Namespace")
|
|
: ""),
|
|
ZeroRegisterDef->getName())
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// A CopyConstantAsImmRenderer emits code to render a G_CONSTANT instruction to
|
|
/// an extended immediate operand.
|
|
class CopyConstantAsImmRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned NewInsnID;
|
|
/// The name of the operand.
|
|
const std::string SymbolicName;
|
|
bool Signed;
|
|
|
|
public:
|
|
CopyConstantAsImmRenderer(unsigned NewInsnID, StringRef SymbolicName)
|
|
: OperandRenderer(OR_CopyConstantAsImm), NewInsnID(NewInsnID),
|
|
SymbolicName(SymbolicName), Signed(true) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_CopyConstantAsImm;
|
|
}
|
|
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
InstructionMatcher &InsnMatcher = Rule.getInstructionMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(InsnMatcher);
|
|
Table << MatchTable::Opcode(Signed ? "GIR_CopyConstantAsSImm"
|
|
: "GIR_CopyConstantAsUImm")
|
|
<< MatchTable::Comment("NewInsnID") << MatchTable::IntValue(NewInsnID)
|
|
<< MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID)
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// A CopyFConstantAsFPImmRenderer emits code to render a G_FCONSTANT
|
|
/// instruction to an extended immediate operand.
|
|
class CopyFConstantAsFPImmRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned NewInsnID;
|
|
/// The name of the operand.
|
|
const std::string SymbolicName;
|
|
|
|
public:
|
|
CopyFConstantAsFPImmRenderer(unsigned NewInsnID, StringRef SymbolicName)
|
|
: OperandRenderer(OR_CopyFConstantAsFPImm), NewInsnID(NewInsnID),
|
|
SymbolicName(SymbolicName) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_CopyFConstantAsFPImm;
|
|
}
|
|
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
InstructionMatcher &InsnMatcher = Rule.getInstructionMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(InsnMatcher);
|
|
Table << MatchTable::Opcode("GIR_CopyFConstantAsFPImm")
|
|
<< MatchTable::Comment("NewInsnID") << MatchTable::IntValue(NewInsnID)
|
|
<< MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID)
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// A CopySubRegRenderer emits code to copy a single register operand from an
|
|
/// existing instruction to the one being built and indicate that only a
|
|
/// subregister should be copied.
|
|
class CopySubRegRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned NewInsnID;
|
|
/// The name of the operand.
|
|
const StringRef SymbolicName;
|
|
/// The subregister to extract.
|
|
const CodeGenSubRegIndex *SubReg;
|
|
|
|
public:
|
|
CopySubRegRenderer(unsigned NewInsnID, StringRef SymbolicName,
|
|
const CodeGenSubRegIndex *SubReg)
|
|
: OperandRenderer(OR_CopySubReg), NewInsnID(NewInsnID),
|
|
SymbolicName(SymbolicName), SubReg(SubReg) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_CopySubReg;
|
|
}
|
|
|
|
const StringRef getSymbolicName() const { return SymbolicName; }
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
const OperandMatcher &Operand = Rule.getOperandMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(Operand.getInstructionMatcher());
|
|
Table << MatchTable::Opcode("GIR_CopySubReg")
|
|
<< MatchTable::Comment("NewInsnID") << MatchTable::IntValue(NewInsnID)
|
|
<< MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID) << MatchTable::Comment("OpIdx")
|
|
<< MatchTable::IntValue(Operand.getOpIdx())
|
|
<< MatchTable::Comment("SubRegIdx")
|
|
<< MatchTable::IntValue(SubReg->EnumValue)
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Adds a specific physical register to the instruction being built.
|
|
/// This is typically useful for WZR/XZR on AArch64.
|
|
class AddRegisterRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned InsnID;
|
|
const Record *RegisterDef;
|
|
|
|
public:
|
|
AddRegisterRenderer(unsigned InsnID, const Record *RegisterDef)
|
|
: OperandRenderer(OR_Register), InsnID(InsnID), RegisterDef(RegisterDef) {
|
|
}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_Register;
|
|
}
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_AddRegister")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::NamedValue(
|
|
(RegisterDef->getValue("Namespace")
|
|
? RegisterDef->getValueAsString("Namespace")
|
|
: ""),
|
|
RegisterDef->getName())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Adds a specific temporary virtual register to the instruction being built.
|
|
/// This is used to chain instructions together when emitting multiple
|
|
/// instructions.
|
|
class TempRegRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned InsnID;
|
|
unsigned TempRegID;
|
|
bool IsDef;
|
|
|
|
public:
|
|
TempRegRenderer(unsigned InsnID, unsigned TempRegID, bool IsDef = false)
|
|
: OperandRenderer(OR_Register), InsnID(InsnID), TempRegID(TempRegID),
|
|
IsDef(IsDef) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_TempRegister;
|
|
}
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_AddTempRegister")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("TempRegID") << MatchTable::IntValue(TempRegID)
|
|
<< MatchTable::Comment("TempRegFlags");
|
|
if (IsDef)
|
|
Table << MatchTable::NamedValue("RegState::Define");
|
|
else
|
|
Table << MatchTable::IntValue(0);
|
|
Table << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Adds a specific immediate to the instruction being built.
|
|
class ImmRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned InsnID;
|
|
int64_t Imm;
|
|
|
|
public:
|
|
ImmRenderer(unsigned InsnID, int64_t Imm)
|
|
: OperandRenderer(OR_Imm), InsnID(InsnID), Imm(Imm) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_Imm;
|
|
}
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_AddImm") << MatchTable::Comment("InsnID")
|
|
<< MatchTable::IntValue(InsnID) << MatchTable::Comment("Imm")
|
|
<< MatchTable::IntValue(Imm) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Adds operands by calling a renderer function supplied by the ComplexPattern
|
|
/// matcher function.
|
|
class RenderComplexPatternOperand : public OperandRenderer {
|
|
private:
|
|
unsigned InsnID;
|
|
const Record &TheDef;
|
|
/// The name of the operand.
|
|
const StringRef SymbolicName;
|
|
/// The renderer number. This must be unique within a rule since it's used to
|
|
/// identify a temporary variable to hold the renderer function.
|
|
unsigned RendererID;
|
|
/// When provided, this is the suboperand of the ComplexPattern operand to
|
|
/// render. Otherwise all the suboperands will be rendered.
|
|
Optional<unsigned> SubOperand;
|
|
|
|
unsigned getNumOperands() const {
|
|
return TheDef.getValueAsDag("Operands")->getNumArgs();
|
|
}
|
|
|
|
public:
|
|
RenderComplexPatternOperand(unsigned InsnID, const Record &TheDef,
|
|
StringRef SymbolicName, unsigned RendererID,
|
|
Optional<unsigned> SubOperand = None)
|
|
: OperandRenderer(OR_ComplexPattern), InsnID(InsnID), TheDef(TheDef),
|
|
SymbolicName(SymbolicName), RendererID(RendererID),
|
|
SubOperand(SubOperand) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_ComplexPattern;
|
|
}
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode(SubOperand.hasValue() ? "GIR_ComplexSubOperandRenderer"
|
|
: "GIR_ComplexRenderer")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("RendererID")
|
|
<< MatchTable::IntValue(RendererID);
|
|
if (SubOperand.hasValue())
|
|
Table << MatchTable::Comment("SubOperand")
|
|
<< MatchTable::IntValue(SubOperand.getValue());
|
|
Table << MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
class CustomRenderer : public OperandRenderer {
|
|
protected:
|
|
unsigned InsnID;
|
|
const Record &Renderer;
|
|
/// The name of the operand.
|
|
const std::string SymbolicName;
|
|
|
|
public:
|
|
CustomRenderer(unsigned InsnID, const Record &Renderer,
|
|
StringRef SymbolicName)
|
|
: OperandRenderer(OR_Custom), InsnID(InsnID), Renderer(Renderer),
|
|
SymbolicName(SymbolicName) {}
|
|
|
|
static bool classof(const OperandRenderer *R) {
|
|
return R->getKind() == OR_Custom;
|
|
}
|
|
|
|
void emitRenderOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
InstructionMatcher &InsnMatcher = Rule.getInstructionMatcher(SymbolicName);
|
|
unsigned OldInsnVarID = Rule.getInsnVarID(InsnMatcher);
|
|
Table << MatchTable::Opcode("GIR_CustomRenderer")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("OldInsnID")
|
|
<< MatchTable::IntValue(OldInsnVarID)
|
|
<< MatchTable::Comment("Renderer")
|
|
<< MatchTable::NamedValue(
|
|
"GICR_" + Renderer.getValueAsString("RendererFn").str())
|
|
<< MatchTable::Comment(SymbolicName) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// An action taken when all Matcher predicates succeeded for a parent rule.
|
|
///
|
|
/// Typical actions include:
|
|
/// * Changing the opcode of an instruction.
|
|
/// * Adding an operand to an instruction.
|
|
class MatchAction {
|
|
public:
|
|
virtual ~MatchAction() {}
|
|
|
|
/// Emit the MatchTable opcodes to implement the action.
|
|
virtual void emitActionOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const = 0;
|
|
};
|
|
|
|
/// Generates a comment describing the matched rule being acted upon.
|
|
class DebugCommentAction : public MatchAction {
|
|
private:
|
|
std::string S;
|
|
|
|
public:
|
|
DebugCommentAction(StringRef S) : S(S) {}
|
|
|
|
void emitActionOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Comment(S) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to build an instruction or mutate an existing instruction
|
|
/// into the desired instruction when this is possible.
|
|
class BuildMIAction : public MatchAction {
|
|
private:
|
|
unsigned InsnID;
|
|
const CodeGenInstruction *I;
|
|
InstructionMatcher *Matched;
|
|
std::vector<std::unique_ptr<OperandRenderer>> OperandRenderers;
|
|
|
|
/// True if the instruction can be built solely by mutating the opcode.
|
|
bool canMutate(RuleMatcher &Rule, const InstructionMatcher *Insn) const {
|
|
if (!Insn)
|
|
return false;
|
|
|
|
if (OperandRenderers.size() != Insn->getNumOperands())
|
|
return false;
|
|
|
|
for (const auto &Renderer : enumerate(OperandRenderers)) {
|
|
if (const auto *Copy = dyn_cast<CopyRenderer>(&*Renderer.value())) {
|
|
const OperandMatcher &OM = Rule.getOperandMatcher(Copy->getSymbolicName());
|
|
if (Insn != &OM.getInstructionMatcher() ||
|
|
OM.getOpIdx() != Renderer.index())
|
|
return false;
|
|
} else
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public:
|
|
BuildMIAction(unsigned InsnID, const CodeGenInstruction *I)
|
|
: InsnID(InsnID), I(I), Matched(nullptr) {}
|
|
|
|
unsigned getInsnID() const { return InsnID; }
|
|
const CodeGenInstruction *getCGI() const { return I; }
|
|
|
|
void chooseInsnToMutate(RuleMatcher &Rule) {
|
|
for (auto *MutateCandidate : Rule.mutatable_insns()) {
|
|
if (canMutate(Rule, MutateCandidate)) {
|
|
// Take the first one we're offered that we're able to mutate.
|
|
Rule.reserveInsnMatcherForMutation(MutateCandidate);
|
|
Matched = MutateCandidate;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <class Kind, class... Args>
|
|
Kind &addRenderer(Args&&... args) {
|
|
OperandRenderers.emplace_back(
|
|
llvm::make_unique<Kind>(InsnID, std::forward<Args>(args)...));
|
|
return *static_cast<Kind *>(OperandRenderers.back().get());
|
|
}
|
|
|
|
void emitActionOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
if (Matched) {
|
|
assert(canMutate(Rule, Matched) &&
|
|
"Arranged to mutate an insn that isn't mutatable");
|
|
|
|
unsigned RecycleInsnID = Rule.getInsnVarID(*Matched);
|
|
Table << MatchTable::Opcode("GIR_MutateOpcode")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("RecycleInsnID")
|
|
<< MatchTable::IntValue(RecycleInsnID)
|
|
<< MatchTable::Comment("Opcode")
|
|
<< MatchTable::NamedValue(I->Namespace, I->TheDef->getName())
|
|
<< MatchTable::LineBreak;
|
|
|
|
if (!I->ImplicitDefs.empty() || !I->ImplicitUses.empty()) {
|
|
for (auto Def : I->ImplicitDefs) {
|
|
auto Namespace = Def->getValue("Namespace")
|
|
? Def->getValueAsString("Namespace")
|
|
: "";
|
|
Table << MatchTable::Opcode("GIR_AddImplicitDef")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::NamedValue(Namespace, Def->getName())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
for (auto Use : I->ImplicitUses) {
|
|
auto Namespace = Use->getValue("Namespace")
|
|
? Use->getValueAsString("Namespace")
|
|
: "";
|
|
Table << MatchTable::Opcode("GIR_AddImplicitUse")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::NamedValue(Namespace, Use->getName())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
// TODO: Simple permutation looks like it could be almost as common as
|
|
// mutation due to commutative operations.
|
|
|
|
Table << MatchTable::Opcode("GIR_BuildMI") << MatchTable::Comment("InsnID")
|
|
<< MatchTable::IntValue(InsnID) << MatchTable::Comment("Opcode")
|
|
<< MatchTable::NamedValue(I->Namespace, I->TheDef->getName())
|
|
<< MatchTable::LineBreak;
|
|
for (const auto &Renderer : OperandRenderers)
|
|
Renderer->emitRenderOpcodes(Table, Rule);
|
|
|
|
if (I->mayLoad || I->mayStore) {
|
|
Table << MatchTable::Opcode("GIR_MergeMemOperands")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("MergeInsnID's");
|
|
// Emit the ID's for all the instructions that are matched by this rule.
|
|
// TODO: Limit this to matched instructions that mayLoad/mayStore or have
|
|
// some other means of having a memoperand. Also limit this to
|
|
// emitted instructions that expect to have a memoperand too. For
|
|
// example, (G_SEXT (G_LOAD x)) that results in separate load and
|
|
// sign-extend instructions shouldn't put the memoperand on the
|
|
// sign-extend since it has no effect there.
|
|
std::vector<unsigned> MergeInsnIDs;
|
|
for (const auto &IDMatcherPair : Rule.defined_insn_vars())
|
|
MergeInsnIDs.push_back(IDMatcherPair.second);
|
|
llvm::sort(MergeInsnIDs);
|
|
for (const auto &MergeInsnID : MergeInsnIDs)
|
|
Table << MatchTable::IntValue(MergeInsnID);
|
|
Table << MatchTable::NamedValue("GIU_MergeMemOperands_EndOfList")
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
// FIXME: This is a hack but it's sufficient for ISel. We'll need to do
|
|
// better for combines. Particularly when there are multiple match
|
|
// roots.
|
|
if (InsnID == 0)
|
|
Table << MatchTable::Opcode("GIR_EraseFromParent")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to constrain the operands of an output instruction to the
|
|
/// register classes specified by the definition of that instruction.
|
|
class ConstrainOperandsToDefinitionAction : public MatchAction {
|
|
unsigned InsnID;
|
|
|
|
public:
|
|
ConstrainOperandsToDefinitionAction(unsigned InsnID) : InsnID(InsnID) {}
|
|
|
|
void emitActionOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_ConstrainSelectedInstOperands")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to constrain the specified operand of an output instruction
|
|
/// to the specified register class.
|
|
class ConstrainOperandToRegClassAction : public MatchAction {
|
|
unsigned InsnID;
|
|
unsigned OpIdx;
|
|
const CodeGenRegisterClass &RC;
|
|
|
|
public:
|
|
ConstrainOperandToRegClassAction(unsigned InsnID, unsigned OpIdx,
|
|
const CodeGenRegisterClass &RC)
|
|
: InsnID(InsnID), OpIdx(OpIdx), RC(RC) {}
|
|
|
|
void emitActionOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_ConstrainOperandRC")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::Comment("Op") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::Comment("RC " + RC.getName())
|
|
<< MatchTable::IntValue(RC.EnumValue) << MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
/// Generates code to create a temporary register which can be used to chain
|
|
/// instructions together.
|
|
class MakeTempRegisterAction : public MatchAction {
|
|
private:
|
|
LLTCodeGen Ty;
|
|
unsigned TempRegID;
|
|
|
|
public:
|
|
MakeTempRegisterAction(const LLTCodeGen &Ty, unsigned TempRegID)
|
|
: Ty(Ty), TempRegID(TempRegID) {}
|
|
|
|
void emitActionOpcodes(MatchTable &Table, RuleMatcher &Rule) const override {
|
|
Table << MatchTable::Opcode("GIR_MakeTempReg")
|
|
<< MatchTable::Comment("TempRegID") << MatchTable::IntValue(TempRegID)
|
|
<< MatchTable::Comment("TypeID")
|
|
<< MatchTable::NamedValue(Ty.getCxxEnumValue())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
};
|
|
|
|
InstructionMatcher &RuleMatcher::addInstructionMatcher(StringRef SymbolicName) {
|
|
Matchers.emplace_back(new InstructionMatcher(*this, SymbolicName));
|
|
MutatableInsns.insert(Matchers.back().get());
|
|
return *Matchers.back();
|
|
}
|
|
|
|
void RuleMatcher::addRequiredFeature(Record *Feature) {
|
|
RequiredFeatures.push_back(Feature);
|
|
}
|
|
|
|
const std::vector<Record *> &RuleMatcher::getRequiredFeatures() const {
|
|
return RequiredFeatures;
|
|
}
|
|
|
|
// Emplaces an action of the specified Kind at the end of the action list.
|
|
//
|
|
// Returns a reference to the newly created action.
|
|
//
|
|
// Like std::vector::emplace_back(), may invalidate all iterators if the new
|
|
// size exceeds the capacity. Otherwise, only invalidates the past-the-end
|
|
// iterator.
|
|
template <class Kind, class... Args>
|
|
Kind &RuleMatcher::addAction(Args &&... args) {
|
|
Actions.emplace_back(llvm::make_unique<Kind>(std::forward<Args>(args)...));
|
|
return *static_cast<Kind *>(Actions.back().get());
|
|
}
|
|
|
|
// Emplaces an action of the specified Kind before the given insertion point.
|
|
//
|
|
// Returns an iterator pointing at the newly created instruction.
|
|
//
|
|
// Like std::vector::insert(), may invalidate all iterators if the new size
|
|
// exceeds the capacity. Otherwise, only invalidates the iterators from the
|
|
// insertion point onwards.
|
|
template <class Kind, class... Args>
|
|
action_iterator RuleMatcher::insertAction(action_iterator InsertPt,
|
|
Args &&... args) {
|
|
return Actions.emplace(InsertPt,
|
|
llvm::make_unique<Kind>(std::forward<Args>(args)...));
|
|
}
|
|
|
|
unsigned RuleMatcher::implicitlyDefineInsnVar(InstructionMatcher &Matcher) {
|
|
unsigned NewInsnVarID = NextInsnVarID++;
|
|
InsnVariableIDs[&Matcher] = NewInsnVarID;
|
|
return NewInsnVarID;
|
|
}
|
|
|
|
unsigned RuleMatcher::getInsnVarID(InstructionMatcher &InsnMatcher) const {
|
|
const auto &I = InsnVariableIDs.find(&InsnMatcher);
|
|
if (I != InsnVariableIDs.end())
|
|
return I->second;
|
|
llvm_unreachable("Matched Insn was not captured in a local variable");
|
|
}
|
|
|
|
void RuleMatcher::defineOperand(StringRef SymbolicName, OperandMatcher &OM) {
|
|
if (DefinedOperands.find(SymbolicName) == DefinedOperands.end()) {
|
|
DefinedOperands[SymbolicName] = &OM;
|
|
return;
|
|
}
|
|
|
|
// If the operand is already defined, then we must ensure both references in
|
|
// the matcher have the exact same node.
|
|
OM.addPredicate<SameOperandMatcher>(OM.getSymbolicName());
|
|
}
|
|
|
|
InstructionMatcher &
|
|
RuleMatcher::getInstructionMatcher(StringRef SymbolicName) const {
|
|
for (const auto &I : InsnVariableIDs)
|
|
if (I.first->getSymbolicName() == SymbolicName)
|
|
return *I.first;
|
|
llvm_unreachable(
|
|
("Failed to lookup instruction " + SymbolicName).str().c_str());
|
|
}
|
|
|
|
const OperandMatcher &
|
|
RuleMatcher::getOperandMatcher(StringRef Name) const {
|
|
const auto &I = DefinedOperands.find(Name);
|
|
|
|
if (I == DefinedOperands.end())
|
|
PrintFatalError(SrcLoc, "Operand " + Name + " was not declared in matcher");
|
|
|
|
return *I->second;
|
|
}
|
|
|
|
void RuleMatcher::emit(MatchTable &Table) {
|
|
if (Matchers.empty())
|
|
llvm_unreachable("Unexpected empty matcher!");
|
|
|
|
// The representation supports rules that require multiple roots such as:
|
|
// %ptr(p0) = ...
|
|
// %elt0(s32) = G_LOAD %ptr
|
|
// %1(p0) = G_ADD %ptr, 4
|
|
// %elt1(s32) = G_LOAD p0 %1
|
|
// which could be usefully folded into:
|
|
// %ptr(p0) = ...
|
|
// %elt0(s32), %elt1(s32) = TGT_LOAD_PAIR %ptr
|
|
// on some targets but we don't need to make use of that yet.
|
|
assert(Matchers.size() == 1 && "Cannot handle multi-root matchers yet");
|
|
|
|
unsigned LabelID = Table.allocateLabelID();
|
|
Table << MatchTable::Opcode("GIM_Try", +1)
|
|
<< MatchTable::Comment("On fail goto")
|
|
<< MatchTable::JumpTarget(LabelID)
|
|
<< MatchTable::Comment(("Rule ID " + Twine(RuleID) + " //").str())
|
|
<< MatchTable::LineBreak;
|
|
|
|
if (!RequiredFeatures.empty()) {
|
|
Table << MatchTable::Opcode("GIM_CheckFeatures")
|
|
<< MatchTable::NamedValue(getNameForFeatureBitset(RequiredFeatures))
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
Matchers.front()->emitPredicateOpcodes(Table, *this);
|
|
|
|
// We must also check if it's safe to fold the matched instructions.
|
|
if (InsnVariableIDs.size() >= 2) {
|
|
// Invert the map to create stable ordering (by var names)
|
|
SmallVector<unsigned, 2> InsnIDs;
|
|
for (const auto &Pair : InsnVariableIDs) {
|
|
// Skip the root node since it isn't moving anywhere. Everything else is
|
|
// sinking to meet it.
|
|
if (Pair.first == Matchers.front().get())
|
|
continue;
|
|
|
|
InsnIDs.push_back(Pair.second);
|
|
}
|
|
llvm::sort(InsnIDs);
|
|
|
|
for (const auto &InsnID : InsnIDs) {
|
|
// Reject the difficult cases until we have a more accurate check.
|
|
Table << MatchTable::Opcode("GIM_CheckIsSafeToFold")
|
|
<< MatchTable::Comment("InsnID") << MatchTable::IntValue(InsnID)
|
|
<< MatchTable::LineBreak;
|
|
|
|
// FIXME: Emit checks to determine it's _actually_ safe to fold and/or
|
|
// account for unsafe cases.
|
|
//
|
|
// Example:
|
|
// MI1--> %0 = ...
|
|
// %1 = ... %0
|
|
// MI0--> %2 = ... %0
|
|
// It's not safe to erase MI1. We currently handle this by not
|
|
// erasing %0 (even when it's dead).
|
|
//
|
|
// Example:
|
|
// MI1--> %0 = load volatile @a
|
|
// %1 = load volatile @a
|
|
// MI0--> %2 = ... %0
|
|
// It's not safe to sink %0's def past %1. We currently handle
|
|
// this by rejecting all loads.
|
|
//
|
|
// Example:
|
|
// MI1--> %0 = load @a
|
|
// %1 = store @a
|
|
// MI0--> %2 = ... %0
|
|
// It's not safe to sink %0's def past %1. We currently handle
|
|
// this by rejecting all loads.
|
|
//
|
|
// Example:
|
|
// G_CONDBR %cond, @BB1
|
|
// BB0:
|
|
// MI1--> %0 = load @a
|
|
// G_BR @BB1
|
|
// BB1:
|
|
// MI0--> %2 = ... %0
|
|
// It's not always safe to sink %0 across control flow. In this
|
|
// case it may introduce a memory fault. We currentl handle this
|
|
// by rejecting all loads.
|
|
}
|
|
}
|
|
|
|
for (const auto &PM : EpilogueMatchers)
|
|
PM->emitPredicateOpcodes(Table, *this);
|
|
|
|
for (const auto &MA : Actions)
|
|
MA->emitActionOpcodes(Table, *this);
|
|
|
|
if (Table.isWithCoverage())
|
|
Table << MatchTable::Opcode("GIR_Coverage") << MatchTable::IntValue(RuleID)
|
|
<< MatchTable::LineBreak;
|
|
else
|
|
Table << MatchTable::Comment(("GIR_Coverage, " + Twine(RuleID) + ",").str())
|
|
<< MatchTable::LineBreak;
|
|
|
|
Table << MatchTable::Opcode("GIR_Done", -1) << MatchTable::LineBreak
|
|
<< MatchTable::Label(LabelID);
|
|
++NumPatternEmitted;
|
|
}
|
|
|
|
bool RuleMatcher::isHigherPriorityThan(const RuleMatcher &B) const {
|
|
// Rules involving more match roots have higher priority.
|
|
if (Matchers.size() > B.Matchers.size())
|
|
return true;
|
|
if (Matchers.size() < B.Matchers.size())
|
|
return false;
|
|
|
|
for (const auto &Matcher : zip(Matchers, B.Matchers)) {
|
|
if (std::get<0>(Matcher)->isHigherPriorityThan(*std::get<1>(Matcher)))
|
|
return true;
|
|
if (std::get<1>(Matcher)->isHigherPriorityThan(*std::get<0>(Matcher)))
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
unsigned RuleMatcher::countRendererFns() const {
|
|
return std::accumulate(
|
|
Matchers.begin(), Matchers.end(), 0,
|
|
[](unsigned A, const std::unique_ptr<InstructionMatcher> &Matcher) {
|
|
return A + Matcher->countRendererFns();
|
|
});
|
|
}
|
|
|
|
bool OperandPredicateMatcher::isHigherPriorityThan(
|
|
const OperandPredicateMatcher &B) const {
|
|
// Generally speaking, an instruction is more important than an Int or a
|
|
// LiteralInt because it can cover more nodes but theres an exception to
|
|
// this. G_CONSTANT's are less important than either of those two because they
|
|
// are more permissive.
|
|
|
|
const InstructionOperandMatcher *AOM =
|
|
dyn_cast<InstructionOperandMatcher>(this);
|
|
const InstructionOperandMatcher *BOM =
|
|
dyn_cast<InstructionOperandMatcher>(&B);
|
|
bool AIsConstantInsn = AOM && AOM->getInsnMatcher().isConstantInstruction();
|
|
bool BIsConstantInsn = BOM && BOM->getInsnMatcher().isConstantInstruction();
|
|
|
|
if (AOM && BOM) {
|
|
// The relative priorities between a G_CONSTANT and any other instruction
|
|
// don't actually matter but this code is needed to ensure a strict weak
|
|
// ordering. This is particularly important on Windows where the rules will
|
|
// be incorrectly sorted without it.
|
|
if (AIsConstantInsn != BIsConstantInsn)
|
|
return AIsConstantInsn < BIsConstantInsn;
|
|
return false;
|
|
}
|
|
|
|
if (AOM && AIsConstantInsn && (B.Kind == OPM_Int || B.Kind == OPM_LiteralInt))
|
|
return false;
|
|
if (BOM && BIsConstantInsn && (Kind == OPM_Int || Kind == OPM_LiteralInt))
|
|
return true;
|
|
|
|
return Kind < B.Kind;
|
|
}
|
|
|
|
void SameOperandMatcher::emitPredicateOpcodes(MatchTable &Table,
|
|
RuleMatcher &Rule) const {
|
|
const OperandMatcher &OtherOM = Rule.getOperandMatcher(MatchingName);
|
|
unsigned OtherInsnVarID = Rule.getInsnVarID(OtherOM.getInstructionMatcher());
|
|
assert(OtherInsnVarID == OtherOM.getInstructionMatcher().getInsnVarID());
|
|
|
|
Table << MatchTable::Opcode("GIM_CheckIsSameOperand")
|
|
<< MatchTable::Comment("MI") << MatchTable::IntValue(InsnVarID)
|
|
<< MatchTable::Comment("OpIdx") << MatchTable::IntValue(OpIdx)
|
|
<< MatchTable::Comment("OtherMI")
|
|
<< MatchTable::IntValue(OtherInsnVarID)
|
|
<< MatchTable::Comment("OtherOpIdx")
|
|
<< MatchTable::IntValue(OtherOM.getOpIdx())
|
|
<< MatchTable::LineBreak;
|
|
}
|
|
|
|
//===- GlobalISelEmitter class --------------------------------------------===//
|
|
|
|
class GlobalISelEmitter {
|
|
public:
|
|
explicit GlobalISelEmitter(RecordKeeper &RK);
|
|
void run(raw_ostream &OS);
|
|
|
|
private:
|
|
const RecordKeeper &RK;
|
|
const CodeGenDAGPatterns CGP;
|
|
const CodeGenTarget &Target;
|
|
CodeGenRegBank CGRegs;
|
|
|
|
/// Keep track of the equivalence between SDNodes and Instruction by mapping
|
|
/// SDNodes to the GINodeEquiv mapping. We need to map to the GINodeEquiv to
|
|
/// check for attributes on the relation such as CheckMMOIsNonAtomic.
|
|
/// This is defined using 'GINodeEquiv' in the target description.
|
|
DenseMap<Record *, Record *> NodeEquivs;
|
|
|
|
/// Keep track of the equivalence between ComplexPattern's and
|
|
/// GIComplexOperandMatcher. Map entries are specified by subclassing
|
|
/// GIComplexPatternEquiv.
|
|
DenseMap<const Record *, const Record *> ComplexPatternEquivs;
|
|
|
|
/// Keep track of the equivalence between SDNodeXForm's and
|
|
/// GICustomOperandRenderer. Map entries are specified by subclassing
|
|
/// GISDNodeXFormEquiv.
|
|
DenseMap<const Record *, const Record *> SDNodeXFormEquivs;
|
|
|
|
/// Keep track of Scores of PatternsToMatch similar to how the DAG does.
|
|
/// This adds compatibility for RuleMatchers to use this for ordering rules.
|
|
DenseMap<uint64_t, int> RuleMatcherScores;
|
|
|
|
// Map of predicates to their subtarget features.
|
|
SubtargetFeatureInfoMap SubtargetFeatures;
|
|
|
|
// Rule coverage information.
|
|
Optional<CodeGenCoverage> RuleCoverage;
|
|
|
|
void gatherOpcodeValues();
|
|
void gatherTypeIDValues();
|
|
void gatherNodeEquivs();
|
|
|
|
Record *findNodeEquiv(Record *N) const;
|
|
const CodeGenInstruction *getEquivNode(Record &Equiv,
|
|
const TreePatternNode *N) const;
|
|
|
|
Error importRulePredicates(RuleMatcher &M, ArrayRef<Predicate> Predicates);
|
|
Expected<InstructionMatcher &>
|
|
createAndImportSelDAGMatcher(RuleMatcher &Rule,
|
|
InstructionMatcher &InsnMatcher,
|
|
const TreePatternNode *Src, unsigned &TempOpIdx);
|
|
Error importComplexPatternOperandMatcher(OperandMatcher &OM, Record *R,
|
|
unsigned &TempOpIdx) const;
|
|
Error importChildMatcher(RuleMatcher &Rule, InstructionMatcher &InsnMatcher,
|
|
const TreePatternNode *SrcChild,
|
|
bool OperandIsAPointer, unsigned OpIdx,
|
|
unsigned &TempOpIdx);
|
|
|
|
Expected<BuildMIAction &>
|
|
createAndImportInstructionRenderer(RuleMatcher &M,
|
|
const TreePatternNode *Dst);
|
|
Expected<action_iterator> createAndImportSubInstructionRenderer(
|
|
action_iterator InsertPt, RuleMatcher &M, const TreePatternNode *Dst,
|
|
unsigned TempReg);
|
|
Expected<action_iterator>
|
|
createInstructionRenderer(action_iterator InsertPt, RuleMatcher &M,
|
|
const TreePatternNode *Dst);
|
|
void importExplicitDefRenderers(BuildMIAction &DstMIBuilder);
|
|
Expected<action_iterator>
|
|
importExplicitUseRenderers(action_iterator InsertPt, RuleMatcher &M,
|
|
BuildMIAction &DstMIBuilder,
|
|
const llvm::TreePatternNode *Dst);
|
|
Expected<action_iterator>
|
|
importExplicitUseRenderer(action_iterator InsertPt, RuleMatcher &Rule,
|
|
BuildMIAction &DstMIBuilder,
|
|
TreePatternNode *DstChild);
|
|
Error importDefaultOperandRenderers(BuildMIAction &DstMIBuilder,
|
|
DagInit *DefaultOps) const;
|
|
Error
|
|
importImplicitDefRenderers(BuildMIAction &DstMIBuilder,
|
|
const std::vector<Record *> &ImplicitDefs) const;
|
|
|
|
void emitCxxPredicateFns(raw_ostream &OS, StringRef CodeFieldName,
|
|
StringRef TypeIdentifier, StringRef ArgType,
|
|
StringRef ArgName, StringRef AdditionalDeclarations,
|
|
std::function<bool(const Record *R)> Filter);
|
|
void emitImmPredicateFns(raw_ostream &OS, StringRef TypeIdentifier,
|
|
StringRef ArgType,
|
|
std::function<bool(const Record *R)> Filter);
|
|
void emitMIPredicateFns(raw_ostream &OS);
|
|
|
|
/// Analyze pattern \p P, returning a matcher for it if possible.
|
|
/// Otherwise, return an Error explaining why we don't support it.
|
|
Expected<RuleMatcher> runOnPattern(const PatternToMatch &P);
|
|
|
|
void declareSubtargetFeature(Record *Predicate);
|
|
|
|
MatchTable buildMatchTable(MutableArrayRef<RuleMatcher> Rules, bool Optimize,
|
|
bool WithCoverage);
|
|
|
|
public:
|
|
/// Takes a sequence of \p Rules and group them based on the predicates
|
|
/// they share. \p MatcherStorage is used as a memory container
|
|
/// for the group that are created as part of this process.
|
|
///
|
|
/// What this optimization does looks like if GroupT = GroupMatcher:
|
|
/// Output without optimization:
|
|
/// \verbatim
|
|
/// # R1
|
|
/// # predicate A
|
|
/// # predicate B
|
|
/// ...
|
|
/// # R2
|
|
/// # predicate A // <-- effectively this is going to be checked twice.
|
|
/// // Once in R1 and once in R2.
|
|
/// # predicate C
|
|
/// \endverbatim
|
|
/// Output with optimization:
|
|
/// \verbatim
|
|
/// # Group1_2
|
|
/// # predicate A // <-- Check is now shared.
|
|
/// # R1
|
|
/// # predicate B
|
|
/// # R2
|
|
/// # predicate C
|
|
/// \endverbatim
|
|
template <class GroupT>
|
|
static std::vector<Matcher *> optimizeRules(
|
|
ArrayRef<Matcher *> Rules,
|
|
std::vector<std::unique_ptr<Matcher>> &MatcherStorage);
|
|
};
|
|
|
|
void GlobalISelEmitter::gatherOpcodeValues() {
|
|
InstructionOpcodeMatcher::initOpcodeValuesMap(Target);
|
|
}
|
|
|
|
void GlobalISelEmitter::gatherTypeIDValues() {
|
|
LLTOperandMatcher::initTypeIDValuesMap();
|
|
}
|
|
|
|
void GlobalISelEmitter::gatherNodeEquivs() {
|
|
assert(NodeEquivs.empty());
|
|
for (Record *Equiv : RK.getAllDerivedDefinitions("GINodeEquiv"))
|
|
NodeEquivs[Equiv->getValueAsDef("Node")] = Equiv;
|
|
|
|
assert(ComplexPatternEquivs.empty());
|
|
for (Record *Equiv : RK.getAllDerivedDefinitions("GIComplexPatternEquiv")) {
|
|
Record *SelDAGEquiv = Equiv->getValueAsDef("SelDAGEquivalent");
|
|
if (!SelDAGEquiv)
|
|
continue;
|
|
ComplexPatternEquivs[SelDAGEquiv] = Equiv;
|
|
}
|
|
|
|
assert(SDNodeXFormEquivs.empty());
|
|
for (Record *Equiv : RK.getAllDerivedDefinitions("GISDNodeXFormEquiv")) {
|
|
Record *SelDAGEquiv = Equiv->getValueAsDef("SelDAGEquivalent");
|
|
if (!SelDAGEquiv)
|
|
continue;
|
|
SDNodeXFormEquivs[SelDAGEquiv] = Equiv;
|
|
}
|
|
}
|
|
|
|
Record *GlobalISelEmitter::findNodeEquiv(Record *N) const {
|
|
return NodeEquivs.lookup(N);
|
|
}
|
|
|
|
const CodeGenInstruction *
|
|
GlobalISelEmitter::getEquivNode(Record &Equiv, const TreePatternNode *N) const {
|
|
for (const TreePredicateCall &Call : N->getPredicateCalls()) {
|
|
const TreePredicateFn &Predicate = Call.Fn;
|
|
if (!Equiv.isValueUnset("IfSignExtend") && Predicate.isLoad() &&
|
|
Predicate.isSignExtLoad())
|
|
return &Target.getInstruction(Equiv.getValueAsDef("IfSignExtend"));
|
|
if (!Equiv.isValueUnset("IfZeroExtend") && Predicate.isLoad() &&
|
|
Predicate.isZeroExtLoad())
|
|
return &Target.getInstruction(Equiv.getValueAsDef("IfZeroExtend"));
|
|
}
|
|
return &Target.getInstruction(Equiv.getValueAsDef("I"));
|
|
}
|
|
|
|
GlobalISelEmitter::GlobalISelEmitter(RecordKeeper &RK)
|
|
: RK(RK), CGP(RK), Target(CGP.getTargetInfo()),
|
|
CGRegs(RK, Target.getHwModes()) {}
|
|
|
|
//===- Emitter ------------------------------------------------------------===//
|
|
|
|
Error
|
|
GlobalISelEmitter::importRulePredicates(RuleMatcher &M,
|
|
ArrayRef<Predicate> Predicates) {
|
|
for (const Predicate &P : Predicates) {
|
|
if (!P.Def)
|
|
continue;
|
|
declareSubtargetFeature(P.Def);
|
|
M.addRequiredFeature(P.Def);
|
|
}
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
Expected<InstructionMatcher &> GlobalISelEmitter::createAndImportSelDAGMatcher(
|
|
RuleMatcher &Rule, InstructionMatcher &InsnMatcher,
|
|
const TreePatternNode *Src, unsigned &TempOpIdx) {
|
|
Record *SrcGIEquivOrNull = nullptr;
|
|
const CodeGenInstruction *SrcGIOrNull = nullptr;
|
|
|
|
// Start with the defined operands (i.e., the results of the root operator).
|
|
if (Src->getExtTypes().size() > 1)
|
|
return failedImport("Src pattern has multiple results");
|
|
|
|
if (Src->isLeaf()) {
|
|
Init *SrcInit = Src->getLeafValue();
|
|
if (isa<IntInit>(SrcInit)) {
|
|
InsnMatcher.addPredicate<InstructionOpcodeMatcher>(
|
|
&Target.getInstruction(RK.getDef("G_CONSTANT")));
|
|
} else
|
|
return failedImport(
|
|
"Unable to deduce gMIR opcode to handle Src (which is a leaf)");
|
|
} else {
|
|
SrcGIEquivOrNull = findNodeEquiv(Src->getOperator());
|
|
if (!SrcGIEquivOrNull)
|
|
return failedImport("Pattern operator lacks an equivalent Instruction" +
|
|
explainOperator(Src->getOperator()));
|
|
SrcGIOrNull = getEquivNode(*SrcGIEquivOrNull, Src);
|
|
|
|
// The operators look good: match the opcode
|
|
InsnMatcher.addPredicate<InstructionOpcodeMatcher>(SrcGIOrNull);
|
|
}
|
|
|
|
unsigned OpIdx = 0;
|
|
for (const TypeSetByHwMode &VTy : Src->getExtTypes()) {
|
|
// Results don't have a name unless they are the root node. The caller will
|
|
// set the name if appropriate.
|
|
OperandMatcher &OM = InsnMatcher.addOperand(OpIdx++, "", TempOpIdx);
|
|
if (auto Error = OM.addTypeCheckPredicate(VTy, false /* OperandIsAPointer */))
|
|
return failedImport(toString(std::move(Error)) +
|
|
" for result of Src pattern operator");
|
|
}
|
|
|
|
for (const TreePredicateCall &Call : Src->getPredicateCalls()) {
|
|
const TreePredicateFn &Predicate = Call.Fn;
|
|
if (Predicate.isAlwaysTrue())
|
|
continue;
|
|
|
|
if (Predicate.isImmediatePattern()) {
|
|
InsnMatcher.addPredicate<InstructionImmPredicateMatcher>(Predicate);
|
|
continue;
|
|
}
|
|
|
|
// G_LOAD is used for both non-extending and any-extending loads.
|
|
if (Predicate.isLoad() && Predicate.isNonExtLoad()) {
|
|
InsnMatcher.addPredicate<MemoryVsLLTSizePredicateMatcher>(
|
|
0, MemoryVsLLTSizePredicateMatcher::EqualTo, 0);
|
|
continue;
|
|
}
|
|
if (Predicate.isLoad() && Predicate.isAnyExtLoad()) {
|
|
InsnMatcher.addPredicate<MemoryVsLLTSizePredicateMatcher>(
|
|
0, MemoryVsLLTSizePredicateMatcher::LessThan, 0);
|
|
continue;
|
|
}
|
|
|
|
// No check required. We already did it by swapping the opcode.
|
|
if (!SrcGIEquivOrNull->isValueUnset("IfSignExtend") &&
|
|
Predicate.isSignExtLoad())
|
|
continue;
|
|
|
|
// No check required. We already did it by swapping the opcode.
|
|
if (!SrcGIEquivOrNull->isValueUnset("IfZeroExtend") &&
|
|
Predicate.isZeroExtLoad())
|
|
continue;
|
|
|
|
// No check required. G_STORE by itself is a non-extending store.
|
|
if (Predicate.isNonTruncStore())
|
|
continue;
|
|
|
|
if (Predicate.isLoad() || Predicate.isStore() || Predicate.isAtomic()) {
|
|
if (Predicate.getMemoryVT() != nullptr) {
|
|
Optional<LLTCodeGen> MemTyOrNone =
|
|
MVTToLLT(getValueType(Predicate.getMemoryVT()));
|
|
|
|
if (!MemTyOrNone)
|
|
return failedImport("MemVT could not be converted to LLT");
|
|
|
|
// MMO's work in bytes so we must take care of unusual types like i1
|
|
// don't round down.
|
|
unsigned MemSizeInBits =
|
|
llvm::alignTo(MemTyOrNone->get().getSizeInBits(), 8);
|
|
|
|
InsnMatcher.addPredicate<MemorySizePredicateMatcher>(
|
|
0, MemSizeInBits / 8);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (Predicate.isLoad() || Predicate.isStore()) {
|
|
// No check required. A G_LOAD/G_STORE is an unindexed load.
|
|
if (Predicate.isUnindexed())
|
|
continue;
|
|
}
|
|
|
|
if (Predicate.isAtomic()) {
|
|
if (Predicate.isAtomicOrderingMonotonic()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"Monotonic");
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingAcquire()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>("Acquire");
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingRelease()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>("Release");
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingAcquireRelease()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"AcquireRelease");
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingSequentiallyConsistent()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"SequentiallyConsistent");
|
|
continue;
|
|
}
|
|
|
|
if (Predicate.isAtomicOrderingAcquireOrStronger()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"Acquire", AtomicOrderingMMOPredicateMatcher::AO_OrStronger);
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingWeakerThanAcquire()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"Acquire", AtomicOrderingMMOPredicateMatcher::AO_WeakerThan);
|
|
continue;
|
|
}
|
|
|
|
if (Predicate.isAtomicOrderingReleaseOrStronger()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"Release", AtomicOrderingMMOPredicateMatcher::AO_OrStronger);
|
|
continue;
|
|
}
|
|
if (Predicate.isAtomicOrderingWeakerThanRelease()) {
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>(
|
|
"Release", AtomicOrderingMMOPredicateMatcher::AO_WeakerThan);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (Predicate.hasGISelPredicateCode()) {
|
|
InsnMatcher.addPredicate<GenericInstructionPredicateMatcher>(Predicate);
|
|
continue;
|
|
}
|
|
|
|
return failedImport("Src pattern child has predicate (" +
|
|
explainPredicates(Src) + ")");
|
|
}
|
|
if (SrcGIEquivOrNull && SrcGIEquivOrNull->getValueAsBit("CheckMMOIsNonAtomic"))
|
|
InsnMatcher.addPredicate<AtomicOrderingMMOPredicateMatcher>("NotAtomic");
|
|
|
|
if (Src->isLeaf()) {
|
|
Init *SrcInit = Src->getLeafValue();
|
|
if (IntInit *SrcIntInit = dyn_cast<IntInit>(SrcInit)) {
|
|
OperandMatcher &OM =
|
|
InsnMatcher.addOperand(OpIdx++, Src->getName(), TempOpIdx);
|
|
OM.addPredicate<LiteralIntOperandMatcher>(SrcIntInit->getValue());
|
|
} else
|
|
return failedImport(
|
|
"Unable to deduce gMIR opcode to handle Src (which is a leaf)");
|
|
} else {
|
|
assert(SrcGIOrNull &&
|
|
"Expected to have already found an equivalent Instruction");
|
|
if (SrcGIOrNull->TheDef->getName() == "G_CONSTANT" ||
|
|
SrcGIOrNull->TheDef->getName() == "G_FCONSTANT") {
|
|
// imm/fpimm still have operands but we don't need to do anything with it
|
|
// here since we don't support ImmLeaf predicates yet. However, we still
|
|
// need to note the hidden operand to get GIM_CheckNumOperands correct.
|
|
InsnMatcher.addOperand(OpIdx++, "", TempOpIdx);
|
|
return InsnMatcher;
|
|
}
|
|
|
|
// Match the used operands (i.e. the children of the operator).
|
|
for (unsigned i = 0, e = Src->getNumChildren(); i != e; ++i) {
|
|
TreePatternNode *SrcChild = Src->getChild(i);
|
|
|
|
// SelectionDAG allows pointers to be represented with iN since it doesn't
|
|
// distinguish between pointers and integers but they are different types in GlobalISel.
|
|
// Coerce integers to pointers to address space 0 if the context indicates a pointer.
|
|
bool OperandIsAPointer = SrcGIOrNull->isOperandAPointer(i);
|
|
|
|
// For G_INTRINSIC/G_INTRINSIC_W_SIDE_EFFECTS, the operand immediately
|
|
// following the defs is an intrinsic ID.
|
|
if ((SrcGIOrNull->TheDef->getName() == "G_INTRINSIC" ||
|
|
SrcGIOrNull->TheDef->getName() == "G_INTRINSIC_W_SIDE_EFFECTS") &&
|
|
i == 0) {
|
|
if (const CodeGenIntrinsic *II = Src->getIntrinsicInfo(CGP)) {
|
|
OperandMatcher &OM =
|
|
InsnMatcher.addOperand(OpIdx++, SrcChild->getName(), TempOpIdx);
|
|
OM.addPredicate<IntrinsicIDOperandMatcher>(II);
|
|
continue;
|
|
}
|
|
|
|
return failedImport("Expected IntInit containing instrinsic ID)");
|
|
}
|
|
|
|
if (auto Error =
|
|
importChildMatcher(Rule, InsnMatcher, SrcChild, OperandIsAPointer,
|
|
OpIdx++, TempOpIdx))
|
|
return std::move(Error);
|
|
}
|
|
}
|
|
|
|
return InsnMatcher;
|
|
}
|
|
|
|
Error GlobalISelEmitter::importComplexPatternOperandMatcher(
|
|
OperandMatcher &OM, Record *R, unsigned &TempOpIdx) const {
|
|
const auto &ComplexPattern = ComplexPatternEquivs.find(R);
|
|
if (ComplexPattern == ComplexPatternEquivs.end())
|
|
return failedImport("SelectionDAG ComplexPattern (" + R->getName() +
|
|
") not mapped to GlobalISel");
|
|
|
|
OM.addPredicate<ComplexPatternOperandMatcher>(OM, *ComplexPattern->second);
|
|
TempOpIdx++;
|
|
return Error::success();
|
|
}
|
|
|
|
Error GlobalISelEmitter::importChildMatcher(RuleMatcher &Rule,
|
|
InstructionMatcher &InsnMatcher,
|
|
const TreePatternNode *SrcChild,
|
|
bool OperandIsAPointer,
|
|
unsigned OpIdx,
|
|
unsigned &TempOpIdx) {
|
|
OperandMatcher &OM =
|
|
InsnMatcher.addOperand(OpIdx, SrcChild->getName(), TempOpIdx);
|
|
if (OM.isSameAsAnotherOperand())
|
|
return Error::success();
|
|
|
|
ArrayRef<TypeSetByHwMode> ChildTypes = SrcChild->getExtTypes();
|
|
if (ChildTypes.size() != 1)
|
|
return failedImport("Src pattern child has multiple results");
|
|
|
|
// Check MBB's before the type check since they are not a known type.
|
|
if (!SrcChild->isLeaf()) {
|
|
if (SrcChild->getOperator()->isSubClassOf("SDNode")) {
|
|
auto &ChildSDNI = CGP.getSDNodeInfo(SrcChild->getOperator());
|
|
if (ChildSDNI.getSDClassName() == "BasicBlockSDNode") {
|
|
OM.addPredicate<MBBOperandMatcher>();
|
|
return Error::success();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (auto Error =
|
|
OM.addTypeCheckPredicate(ChildTypes.front(), OperandIsAPointer))
|
|
return failedImport(toString(std::move(Error)) + " for Src operand (" +
|
|
to_string(*SrcChild) + ")");
|
|
|
|
// Check for nested instructions.
|
|
if (!SrcChild->isLeaf()) {
|
|
if (SrcChild->getOperator()->isSubClassOf("ComplexPattern")) {
|
|
// When a ComplexPattern is used as an operator, it should do the same
|
|
// thing as when used as a leaf. However, the children of the operator
|
|
// name the sub-operands that make up the complex operand and we must
|
|
// prepare to reference them in the renderer too.
|
|
unsigned RendererID = TempOpIdx;
|
|
if (auto Error = importComplexPatternOperandMatcher(
|
|
OM, SrcChild->getOperator(), TempOpIdx))
|
|
return Error;
|
|
|
|
for (unsigned i = 0, e = SrcChild->getNumChildren(); i != e; ++i) {
|
|
auto *SubOperand = SrcChild->getChild(i);
|
|
if (!SubOperand->getName().empty()) {
|
|
if (auto Error = Rule.defineComplexSubOperand(SubOperand->getName(),
|
|
SrcChild->getOperator(),
|
|
RendererID, i))
|
|
return Error;
|
|
}
|
|
}
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
auto MaybeInsnOperand = OM.addPredicate<InstructionOperandMatcher>(
|
|
InsnMatcher.getRuleMatcher(), SrcChild->getName());
|
|
if (!MaybeInsnOperand.hasValue()) {
|
|
// This isn't strictly true. If the user were to provide exactly the same
|
|
// matchers as the original operand then we could allow it. However, it's
|
|
// simpler to not permit the redundant specification.
|
|
return failedImport("Nested instruction cannot be the same as another operand");
|
|
}
|
|
|
|
// Map the node to a gMIR instruction.
|
|
InstructionOperandMatcher &InsnOperand = **MaybeInsnOperand;
|
|
auto InsnMatcherOrError = createAndImportSelDAGMatcher(
|
|
Rule, InsnOperand.getInsnMatcher(), SrcChild, TempOpIdx);
|
|
if (auto Error = InsnMatcherOrError.takeError())
|
|
return Error;
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
if (SrcChild->hasAnyPredicate())
|
|
return failedImport("Src pattern child has unsupported predicate");
|
|
|
|
// Check for constant immediates.
|
|
if (auto *ChildInt = dyn_cast<IntInit>(SrcChild->getLeafValue())) {
|
|
OM.addPredicate<ConstantIntOperandMatcher>(ChildInt->getValue());
|
|
return Error::success();
|
|
}
|
|
|
|
// Check for def's like register classes or ComplexPattern's.
|
|
if (auto *ChildDefInit = dyn_cast<DefInit>(SrcChild->getLeafValue())) {
|
|
auto *ChildRec = ChildDefInit->getDef();
|
|
|
|
// Check for register classes.
|
|
if (ChildRec->isSubClassOf("RegisterClass") ||
|
|
ChildRec->isSubClassOf("RegisterOperand")) {
|
|
OM.addPredicate<RegisterBankOperandMatcher>(
|
|
Target.getRegisterClass(getInitValueAsRegClass(ChildDefInit)));
|
|
return Error::success();
|
|
}
|
|
|
|
// Check for ValueType.
|
|
if (ChildRec->isSubClassOf("ValueType")) {
|
|
// We already added a type check as standard practice so this doesn't need
|
|
// to do anything.
|
|
return Error::success();
|
|
}
|
|
|
|
// Check for ComplexPattern's.
|
|
if (ChildRec->isSubClassOf("ComplexPattern"))
|
|
return importComplexPatternOperandMatcher(OM, ChildRec, TempOpIdx);
|
|
|
|
if (ChildRec->isSubClassOf("ImmLeaf")) {
|
|
return failedImport(
|
|
"Src pattern child def is an unsupported tablegen class (ImmLeaf)");
|
|
}
|
|
|
|
return failedImport(
|
|
"Src pattern child def is an unsupported tablegen class");
|
|
}
|
|
|
|
return failedImport("Src pattern child is an unsupported kind");
|
|
}
|
|
|
|
Expected<action_iterator> GlobalISelEmitter::importExplicitUseRenderer(
|
|
action_iterator InsertPt, RuleMatcher &Rule, BuildMIAction &DstMIBuilder,
|
|
TreePatternNode *DstChild) {
|
|
|
|
const auto &SubOperand = Rule.getComplexSubOperand(DstChild->getName());
|
|
if (SubOperand.hasValue()) {
|
|
DstMIBuilder.addRenderer<RenderComplexPatternOperand>(
|
|
*std::get<0>(*SubOperand), DstChild->getName(),
|
|
std::get<1>(*SubOperand), std::get<2>(*SubOperand));
|
|
return InsertPt;
|
|
}
|
|
|
|
if (!DstChild->isLeaf()) {
|
|
|
|
if (DstChild->getOperator()->isSubClassOf("SDNodeXForm")) {
|
|
auto Child = DstChild->getChild(0);
|
|
auto I = SDNodeXFormEquivs.find(DstChild->getOperator());
|
|
if (I != SDNodeXFormEquivs.end()) {
|
|
DstMIBuilder.addRenderer<CustomRenderer>(*I->second, Child->getName());
|
|
return InsertPt;
|
|
}
|
|
return failedImport("SDNodeXForm " + Child->getName() +
|
|
" has no custom renderer");
|
|
}
|
|
|
|
// We accept 'bb' here. It's an operator because BasicBlockSDNode isn't
|
|
// inline, but in MI it's just another operand.
|
|
if (DstChild->getOperator()->isSubClassOf("SDNode")) {
|
|
auto &ChildSDNI = CGP.getSDNodeInfo(DstChild->getOperator());
|
|
if (ChildSDNI.getSDClassName() == "BasicBlockSDNode") {
|
|
DstMIBuilder.addRenderer<CopyRenderer>(DstChild->getName());
|
|
return InsertPt;
|
|
}
|
|
}
|
|
|
|
// Similarly, imm is an operator in TreePatternNode's view but must be
|
|
// rendered as operands.
|
|
// FIXME: The target should be able to choose sign-extended when appropriate
|
|
// (e.g. on Mips).
|
|
if (DstChild->getOperator()->getName() == "imm") {
|
|
DstMIBuilder.addRenderer<CopyConstantAsImmRenderer>(DstChild->getName());
|
|
return InsertPt;
|
|
} else if (DstChild->getOperator()->getName() == "fpimm") {
|
|
DstMIBuilder.addRenderer<CopyFConstantAsFPImmRenderer>(
|
|
DstChild->getName());
|
|
return InsertPt;
|
|
}
|
|
|
|
if (DstChild->getOperator()->isSubClassOf("Instruction")) {
|
|
ArrayRef<TypeSetByHwMode> ChildTypes = DstChild->getExtTypes();
|
|
if (ChildTypes.size() != 1)
|
|
return failedImport("Dst pattern child has multiple results");
|
|
|
|
Optional<LLTCodeGen> OpTyOrNone = None;
|
|
if (ChildTypes.front().isMachineValueType())
|
|
OpTyOrNone =
|
|
MVTToLLT(ChildTypes.front().getMachineValueType().SimpleTy);
|
|
if (!OpTyOrNone)
|
|
return failedImport("Dst operand has an unsupported type");
|
|
|
|
unsigned TempRegID = Rule.allocateTempRegID();
|
|
InsertPt = Rule.insertAction<MakeTempRegisterAction>(
|
|
InsertPt, OpTyOrNone.getValue(), TempRegID);
|
|
DstMIBuilder.addRenderer<TempRegRenderer>(TempRegID);
|
|
|
|
auto InsertPtOrError = createAndImportSubInstructionRenderer(
|
|
++InsertPt, Rule, DstChild, TempRegID);
|
|
if (auto Error = InsertPtOrError.takeError())
|
|
return std::move(Error);
|
|
return InsertPtOrError.get();
|
|
}
|
|
|
|
return failedImport("Dst pattern child isn't a leaf node or an MBB" + llvm::to_string(*DstChild));
|
|
}
|
|
|
|
// It could be a specific immediate in which case we should just check for
|
|
// that immediate.
|
|
if (const IntInit *ChildIntInit =
|
|
dyn_cast<IntInit>(DstChild->getLeafValue())) {
|
|
DstMIBuilder.addRenderer<ImmRenderer>(ChildIntInit->getValue());
|
|
return InsertPt;
|
|
}
|
|
|
|
// Otherwise, we're looking for a bog-standard RegisterClass operand.
|
|
if (auto *ChildDefInit = dyn_cast<DefInit>(DstChild->getLeafValue())) {
|
|
auto *ChildRec = ChildDefInit->getDef();
|
|
|
|
ArrayRef<TypeSetByHwMode> ChildTypes = DstChild->getExtTypes();
|
|
if (ChildTypes.size() != 1)
|
|
return failedImport("Dst pattern child has multiple results");
|
|
|
|
Optional<LLTCodeGen> OpTyOrNone = None;
|
|
if (ChildTypes.front().isMachineValueType())
|
|
OpTyOrNone = MVTToLLT(ChildTypes.front().getMachineValueType().SimpleTy);
|
|
if (!OpTyOrNone)
|
|
return failedImport("Dst operand has an unsupported type");
|
|
|
|
if (ChildRec->isSubClassOf("Register")) {
|
|
DstMIBuilder.addRenderer<AddRegisterRenderer>(ChildRec);
|
|
return InsertPt;
|
|
}
|
|
|
|
if (ChildRec->isSubClassOf("RegisterClass") ||
|
|
ChildRec->isSubClassOf("RegisterOperand") ||
|
|
ChildRec->isSubClassOf("ValueType")) {
|
|
if (ChildRec->isSubClassOf("RegisterOperand") &&
|
|
!ChildRec->isValueUnset("GIZeroRegister")) {
|
|
DstMIBuilder.addRenderer<CopyOrAddZeroRegRenderer>(
|
|
DstChild->getName(), ChildRec->getValueAsDef("GIZeroRegister"));
|
|
return InsertPt;
|
|
}
|
|
|
|
DstMIBuilder.addRenderer<CopyRenderer>(DstChild->getName());
|
|
return InsertPt;
|
|
}
|
|
|
|
if (ChildRec->isSubClassOf("ComplexPattern")) {
|
|
const auto &ComplexPattern = ComplexPatternEquivs.find(ChildRec);
|
|
if (ComplexPattern == ComplexPatternEquivs.end())
|
|
return failedImport(
|
|
"SelectionDAG ComplexPattern not mapped to GlobalISel");
|
|
|
|
const OperandMatcher &OM = Rule.getOperandMatcher(DstChild->getName());
|
|
DstMIBuilder.addRenderer<RenderComplexPatternOperand>(
|
|
*ComplexPattern->second, DstChild->getName(),
|
|
OM.getAllocatedTemporariesBaseID());
|
|
return InsertPt;
|
|
}
|
|
|
|
return failedImport(
|
|
"Dst pattern child def is an unsupported tablegen class");
|
|
}
|
|
|
|
return failedImport("Dst pattern child is an unsupported kind");
|
|
}
|
|
|
|
Expected<BuildMIAction &> GlobalISelEmitter::createAndImportInstructionRenderer(
|
|
RuleMatcher &M, const TreePatternNode *Dst) {
|
|
auto InsertPtOrError = createInstructionRenderer(M.actions_end(), M, Dst);
|
|
if (auto Error = InsertPtOrError.takeError())
|
|
return std::move(Error);
|
|
|
|
action_iterator InsertPt = InsertPtOrError.get();
|
|
BuildMIAction &DstMIBuilder = *static_cast<BuildMIAction *>(InsertPt->get());
|
|
|
|
importExplicitDefRenderers(DstMIBuilder);
|
|
|
|
if (auto Error = importExplicitUseRenderers(InsertPt, M, DstMIBuilder, Dst)
|
|
.takeError())
|
|
return std::move(Error);
|
|
|
|
return DstMIBuilder;
|
|
}
|
|
|
|
Expected<action_iterator>
|
|
GlobalISelEmitter::createAndImportSubInstructionRenderer(
|
|
const action_iterator InsertPt, RuleMatcher &M, const TreePatternNode *Dst,
|
|
unsigned TempRegID) {
|
|
auto InsertPtOrError = createInstructionRenderer(InsertPt, M, Dst);
|
|
|
|
// TODO: Assert there's exactly one result.
|
|
|
|
if (auto Error = InsertPtOrError.takeError())
|
|
return std::move(Error);
|
|
|
|
BuildMIAction &DstMIBuilder =
|
|
*static_cast<BuildMIAction *>(InsertPtOrError.get()->get());
|
|
|
|
// Assign the result to TempReg.
|
|
DstMIBuilder.addRenderer<TempRegRenderer>(TempRegID, true);
|
|
|
|
InsertPtOrError =
|
|
importExplicitUseRenderers(InsertPtOrError.get(), M, DstMIBuilder, Dst);
|
|
if (auto Error = InsertPtOrError.takeError())
|
|
return std::move(Error);
|
|
|
|
M.insertAction<ConstrainOperandsToDefinitionAction>(InsertPt,
|
|
DstMIBuilder.getInsnID());
|
|
return InsertPtOrError.get();
|
|
}
|
|
|
|
Expected<action_iterator> GlobalISelEmitter::createInstructionRenderer(
|
|
action_iterator InsertPt, RuleMatcher &M, const TreePatternNode *Dst) {
|
|
Record *DstOp = Dst->getOperator();
|
|
if (!DstOp->isSubClassOf("Instruction")) {
|
|
if (DstOp->isSubClassOf("ValueType"))
|
|
return failedImport(
|
|
"Pattern operator isn't an instruction (it's a ValueType)");
|
|
return failedImport("Pattern operator isn't an instruction");
|
|
}
|
|
CodeGenInstruction *DstI = &Target.getInstruction(DstOp);
|
|
|
|
// COPY_TO_REGCLASS is just a copy with a ConstrainOperandToRegClassAction
|
|
// attached. Similarly for EXTRACT_SUBREG except that's a subregister copy.
|
|
if (DstI->TheDef->getName() == "COPY_TO_REGCLASS")
|
|
DstI = &Target.getInstruction(RK.getDef("COPY"));
|
|
else if (DstI->TheDef->getName() == "EXTRACT_SUBREG")
|
|
DstI = &Target.getInstruction(RK.getDef("COPY"));
|
|
else if (DstI->TheDef->getName() == "REG_SEQUENCE")
|
|
return failedImport("Unable to emit REG_SEQUENCE");
|
|
|
|
return M.insertAction<BuildMIAction>(InsertPt, M.allocateOutputInsnID(),
|
|
DstI);
|
|
}
|
|
|
|
void GlobalISelEmitter::importExplicitDefRenderers(
|
|
BuildMIAction &DstMIBuilder) {
|
|
const CodeGenInstruction *DstI = DstMIBuilder.getCGI();
|
|
for (unsigned I = 0; I < DstI->Operands.NumDefs; ++I) {
|
|
const CGIOperandList::OperandInfo &DstIOperand = DstI->Operands[I];
|
|
DstMIBuilder.addRenderer<CopyRenderer>(DstIOperand.Name);
|
|
}
|
|
}
|
|
|
|
Expected<action_iterator> GlobalISelEmitter::importExplicitUseRenderers(
|
|
action_iterator InsertPt, RuleMatcher &M, BuildMIAction &DstMIBuilder,
|
|
const llvm::TreePatternNode *Dst) {
|
|
const CodeGenInstruction *DstI = DstMIBuilder.getCGI();
|
|
CodeGenInstruction *OrigDstI = &Target.getInstruction(Dst->getOperator());
|
|
|
|
// EXTRACT_SUBREG needs to use a subregister COPY.
|
|
if (OrigDstI->TheDef->getName() == "EXTRACT_SUBREG") {
|
|
if (!Dst->getChild(0)->isLeaf())
|
|
return failedImport("EXTRACT_SUBREG child #1 is not a leaf");
|
|
|
|
if (DefInit *SubRegInit =
|
|
dyn_cast<DefInit>(Dst->getChild(1)->getLeafValue())) {
|
|
Record *RCDef = getInitValueAsRegClass(Dst->getChild(0)->getLeafValue());
|
|
if (!RCDef)
|
|
return failedImport("EXTRACT_SUBREG child #0 could not "
|
|
"be coerced to a register class");
|
|
|
|
CodeGenRegisterClass *RC = CGRegs.getRegClass(RCDef);
|
|
CodeGenSubRegIndex *SubIdx = CGRegs.getSubRegIdx(SubRegInit->getDef());
|
|
|
|
const auto &SrcRCDstRCPair =
|
|
RC->getMatchingSubClassWithSubRegs(CGRegs, SubIdx);
|
|
if (SrcRCDstRCPair.hasValue()) {
|
|
assert(SrcRCDstRCPair->second && "Couldn't find a matching subclass");
|
|
if (SrcRCDstRCPair->first != RC)
|
|
return failedImport("EXTRACT_SUBREG requires an additional COPY");
|
|
}
|
|
|
|
DstMIBuilder.addRenderer<CopySubRegRenderer>(Dst->getChild(0)->getName(),
|
|
SubIdx);
|
|
return InsertPt;
|
|
}
|
|
|
|
return failedImport("EXTRACT_SUBREG child #1 is not a subreg index");
|
|
}
|
|
|
|
// Render the explicit uses.
|
|
unsigned DstINumUses = OrigDstI->Operands.size() - OrigDstI->Operands.NumDefs;
|
|
unsigned ExpectedDstINumUses = Dst->getNumChildren();
|
|
if (OrigDstI->TheDef->getName() == "COPY_TO_REGCLASS") {
|
|
DstINumUses--; // Ignore the class constraint.
|
|
ExpectedDstINumUses--;
|
|
}
|
|
|
|
unsigned Child = 0;
|
|
unsigned NumDefaultOps = 0;
|
|
for (unsigned I = 0; I != DstINumUses; ++I) {
|
|
const CGIOperandList::OperandInfo &DstIOperand =
|
|
DstI->Operands[DstI->Operands.NumDefs + I];
|
|
|
|
// If the operand has default values, introduce them now.
|
|
// FIXME: Until we have a decent test case that dictates we should do
|
|
// otherwise, we're going to assume that operands with default values cannot
|
|
// be specified in the patterns. Therefore, adding them will not cause us to
|
|
// end up with too many rendered operands.
|
|
if (DstIOperand.Rec->isSubClassOf("OperandWithDefaultOps")) {
|
|
DagInit *DefaultOps = DstIOperand.Rec->getValueAsDag("DefaultOps");
|
|
if (auto Error = importDefaultOperandRenderers(DstMIBuilder, DefaultOps))
|
|
return std::move(Error);
|
|
++NumDefaultOps;
|
|
continue;
|
|
}
|
|
|
|
auto InsertPtOrError = importExplicitUseRenderer(InsertPt, M, DstMIBuilder,
|
|
Dst->getChild(Child));
|
|
if (auto Error = InsertPtOrError.takeError())
|
|
return std::move(Error);
|
|
InsertPt = InsertPtOrError.get();
|
|
++Child;
|
|
}
|
|
|
|
if (NumDefaultOps + ExpectedDstINumUses != DstINumUses)
|
|
return failedImport("Expected " + llvm::to_string(DstINumUses) +
|
|
" used operands but found " +
|
|
llvm::to_string(ExpectedDstINumUses) +
|
|
" explicit ones and " + llvm::to_string(NumDefaultOps) +
|
|
" default ones");
|
|
|
|
return InsertPt;
|
|
}
|
|
|
|
Error GlobalISelEmitter::importDefaultOperandRenderers(
|
|
BuildMIAction &DstMIBuilder, DagInit *DefaultOps) const {
|
|
for (const auto *DefaultOp : DefaultOps->getArgs()) {
|
|
// Look through ValueType operators.
|
|
if (const DagInit *DefaultDagOp = dyn_cast<DagInit>(DefaultOp)) {
|
|
if (const DefInit *DefaultDagOperator =
|
|
dyn_cast<DefInit>(DefaultDagOp->getOperator())) {
|
|
if (DefaultDagOperator->getDef()->isSubClassOf("ValueType"))
|
|
DefaultOp = DefaultDagOp->getArg(0);
|
|
}
|
|
}
|
|
|
|
if (const DefInit *DefaultDefOp = dyn_cast<DefInit>(DefaultOp)) {
|
|
DstMIBuilder.addRenderer<AddRegisterRenderer>(DefaultDefOp->getDef());
|
|
continue;
|
|
}
|
|
|
|
if (const IntInit *DefaultIntOp = dyn_cast<IntInit>(DefaultOp)) {
|
|
DstMIBuilder.addRenderer<ImmRenderer>(DefaultIntOp->getValue());
|
|
continue;
|
|
}
|
|
|
|
return failedImport("Could not add default op");
|
|
}
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
Error GlobalISelEmitter::importImplicitDefRenderers(
|
|
BuildMIAction &DstMIBuilder,
|
|
const std::vector<Record *> &ImplicitDefs) const {
|
|
if (!ImplicitDefs.empty())
|
|
return failedImport("Pattern defines a physical register");
|
|
return Error::success();
|
|
}
|
|
|
|
Expected<RuleMatcher> GlobalISelEmitter::runOnPattern(const PatternToMatch &P) {
|
|
// Keep track of the matchers and actions to emit.
|
|
int Score = P.getPatternComplexity(CGP);
|
|
RuleMatcher M(P.getSrcRecord()->getLoc());
|
|
RuleMatcherScores[M.getRuleID()] = Score;
|
|
M.addAction<DebugCommentAction>(llvm::to_string(*P.getSrcPattern()) +
|
|
" => " +
|
|
llvm::to_string(*P.getDstPattern()));
|
|
|
|
if (auto Error = importRulePredicates(M, P.getPredicates()))
|
|
return std::move(Error);
|
|
|
|
// Next, analyze the pattern operators.
|
|
TreePatternNode *Src = P.getSrcPattern();
|
|
TreePatternNode *Dst = P.getDstPattern();
|
|
|
|
// If the root of either pattern isn't a simple operator, ignore it.
|
|
if (auto Err = isTrivialOperatorNode(Dst))
|
|
return failedImport("Dst pattern root isn't a trivial operator (" +
|
|
toString(std::move(Err)) + ")");
|
|
if (auto Err = isTrivialOperatorNode(Src))
|
|
return failedImport("Src pattern root isn't a trivial operator (" +
|
|
toString(std::move(Err)) + ")");
|
|
|
|
// The different predicates and matchers created during
|
|
// addInstructionMatcher use the RuleMatcher M to set up their
|
|
// instruction ID (InsnVarID) that are going to be used when
|
|
// M is going to be emitted.
|
|
// However, the code doing the emission still relies on the IDs
|
|
// returned during that process by the RuleMatcher when issuing
|
|
// the recordInsn opcodes.
|
|
// Because of that:
|
|
// 1. The order in which we created the predicates
|
|
// and such must be the same as the order in which we emit them,
|
|
// and
|
|
// 2. We need to reset the generation of the IDs in M somewhere between
|
|
// addInstructionMatcher and emit
|
|
//
|
|
// FIXME: Long term, we don't want to have to rely on this implicit
|
|
// naming being the same. One possible solution would be to have
|
|
// explicit operator for operation capture and reference those.
|
|
// The plus side is that it would expose opportunities to share
|
|
// the capture accross rules. The downside is that it would
|
|
// introduce a dependency between predicates (captures must happen
|
|
// before their first use.)
|
|
InstructionMatcher &InsnMatcherTemp = M.addInstructionMatcher(Src->getName());
|
|
unsigned TempOpIdx = 0;
|
|
auto InsnMatcherOrError =
|
|
createAndImportSelDAGMatcher(M, InsnMatcherTemp, Src, TempOpIdx);
|
|
if (auto Error = InsnMatcherOrError.takeError())
|
|
return std::move(Error);
|
|
InstructionMatcher &InsnMatcher = InsnMatcherOrError.get();
|
|
|
|
if (Dst->isLeaf()) {
|
|
Record *RCDef = getInitValueAsRegClass(Dst->getLeafValue());
|
|
|
|
const CodeGenRegisterClass &RC = Target.getRegisterClass(RCDef);
|
|
if (RCDef) {
|
|
// We need to replace the def and all its uses with the specified
|
|
// operand. However, we must also insert COPY's wherever needed.
|
|
// For now, emit a copy and let the register allocator clean up.
|
|
auto &DstI = Target.getInstruction(RK.getDef("COPY"));
|
|
const auto &DstIOperand = DstI.Operands[0];
|
|
|
|
OperandMatcher &OM0 = InsnMatcher.getOperand(0);
|
|
OM0.setSymbolicName(DstIOperand.Name);
|
|
M.defineOperand(OM0.getSymbolicName(), OM0);
|
|
OM0.addPredicate<RegisterBankOperandMatcher>(RC);
|
|
|
|
auto &DstMIBuilder =
|
|
M.addAction<BuildMIAction>(M.allocateOutputInsnID(), &DstI);
|
|
DstMIBuilder.addRenderer<CopyRenderer>(DstIOperand.Name);
|
|
DstMIBuilder.addRenderer<CopyRenderer>(Dst->getName());
|
|
M.addAction<ConstrainOperandToRegClassAction>(0, 0, RC);
|
|
|
|
// We're done with this pattern! It's eligible for GISel emission; return
|
|
// it.
|
|
++NumPatternImported;
|
|
return std::move(M);
|
|
}
|
|
|
|
return failedImport("Dst pattern root isn't a known leaf");
|
|
}
|
|
|
|
// Start with the defined operands (i.e., the results of the root operator).
|
|
Record *DstOp = Dst->getOperator();
|
|
if (!DstOp->isSubClassOf("Instruction"))
|
|
return failedImport("Pattern operator isn't an instruction");
|
|
|
|
auto &DstI = Target.getInstruction(DstOp);
|
|
if (DstI.Operands.NumDefs != Src->getExtTypes().size())
|
|
return failedImport("Src pattern results and dst MI defs are different (" +
|
|
to_string(Src->getExtTypes().size()) + " def(s) vs " +
|
|
to_string(DstI.Operands.NumDefs) + " def(s))");
|
|
|
|
// The root of the match also has constraints on the register bank so that it
|
|
// matches the result instruction.
|
|
unsigned OpIdx = 0;
|
|
for (const TypeSetByHwMode &VTy : Src->getExtTypes()) {
|
|
(void)VTy;
|
|
|
|
const auto &DstIOperand = DstI.Operands[OpIdx];
|
|
Record *DstIOpRec = DstIOperand.Rec;
|
|
if (DstI.TheDef->getName() == "COPY_TO_REGCLASS") {
|
|
DstIOpRec = getInitValueAsRegClass(Dst->getChild(1)->getLeafValue());
|
|
|
|
if (DstIOpRec == nullptr)
|
|
return failedImport(
|
|
"COPY_TO_REGCLASS operand #1 isn't a register class");
|
|
} else if (DstI.TheDef->getName() == "EXTRACT_SUBREG") {
|
|
if (!Dst->getChild(0)->isLeaf())
|
|
return failedImport("EXTRACT_SUBREG operand #0 isn't a leaf");
|
|
|
|
// We can assume that a subregister is in the same bank as it's super
|
|
// register.
|
|
DstIOpRec = getInitValueAsRegClass(Dst->getChild(0)->getLeafValue());
|
|
|
|
if (DstIOpRec == nullptr)
|
|
return failedImport(
|
|
"EXTRACT_SUBREG operand #0 isn't a register class");
|
|
} else if (DstIOpRec->isSubClassOf("RegisterOperand"))
|
|
DstIOpRec = DstIOpRec->getValueAsDef("RegClass");
|
|
else if (!DstIOpRec->isSubClassOf("RegisterClass"))
|
|
return failedImport("Dst MI def isn't a register class" +
|
|
to_string(*Dst));
|
|
|
|
OperandMatcher &OM = InsnMatcher.getOperand(OpIdx);
|
|
OM.setSymbolicName(DstIOperand.Name);
|
|
M.defineOperand(OM.getSymbolicName(), OM);
|
|
OM.addPredicate<RegisterBankOperandMatcher>(
|
|
Target.getRegisterClass(DstIOpRec));
|
|
++OpIdx;
|
|
}
|
|
|
|
auto DstMIBuilderOrError = createAndImportInstructionRenderer(M, Dst);
|
|
if (auto Error = DstMIBuilderOrError.takeError())
|
|
return std::move(Error);
|
|
BuildMIAction &DstMIBuilder = DstMIBuilderOrError.get();
|
|
|
|
// Render the implicit defs.
|
|
// These are only added to the root of the result.
|
|
if (auto Error = importImplicitDefRenderers(DstMIBuilder, P.getDstRegs()))
|
|
return std::move(Error);
|
|
|
|
DstMIBuilder.chooseInsnToMutate(M);
|
|
|
|
// Constrain the registers to classes. This is normally derived from the
|
|
// emitted instruction but a few instructions require special handling.
|
|
if (DstI.TheDef->getName() == "COPY_TO_REGCLASS") {
|
|
// COPY_TO_REGCLASS does not provide operand constraints itself but the
|
|
// result is constrained to the class given by the second child.
|
|
Record *DstIOpRec =
|
|
getInitValueAsRegClass(Dst->getChild(1)->getLeafValue());
|
|
|
|
if (DstIOpRec == nullptr)
|
|
return failedImport("COPY_TO_REGCLASS operand #1 isn't a register class");
|
|
|
|
M.addAction<ConstrainOperandToRegClassAction>(
|
|
0, 0, Target.getRegisterClass(DstIOpRec));
|
|
|
|
// We're done with this pattern! It's eligible for GISel emission; return
|
|
// it.
|
|
++NumPatternImported;
|
|
return std::move(M);
|
|
}
|
|
|
|
if (DstI.TheDef->getName() == "EXTRACT_SUBREG") {
|
|
// EXTRACT_SUBREG selects into a subregister COPY but unlike most
|
|
// instructions, the result register class is controlled by the
|
|
// subregisters of the operand. As a result, we must constrain the result
|
|
// class rather than check that it's already the right one.
|
|
if (!Dst->getChild(0)->isLeaf())
|
|
return failedImport("EXTRACT_SUBREG child #1 is not a leaf");
|
|
|
|
DefInit *SubRegInit = dyn_cast<DefInit>(Dst->getChild(1)->getLeafValue());
|
|
if (!SubRegInit)
|
|
return failedImport("EXTRACT_SUBREG child #1 is not a subreg index");
|
|
|
|
// Constrain the result to the same register bank as the operand.
|
|
Record *DstIOpRec =
|
|
getInitValueAsRegClass(Dst->getChild(0)->getLeafValue());
|
|
|
|
if (DstIOpRec == nullptr)
|
|
return failedImport("EXTRACT_SUBREG operand #1 isn't a register class");
|
|
|
|
CodeGenSubRegIndex *SubIdx = CGRegs.getSubRegIdx(SubRegInit->getDef());
|
|
CodeGenRegisterClass *SrcRC = CGRegs.getRegClass(DstIOpRec);
|
|
|
|
// It would be nice to leave this constraint implicit but we're required
|
|
// to pick a register class so constrain the result to a register class
|
|
// that can hold the correct MVT.
|
|
//
|
|
// FIXME: This may introduce an extra copy if the chosen class doesn't
|
|
// actually contain the subregisters.
|
|
assert(Src->getExtTypes().size() == 1 &&
|
|
"Expected Src of EXTRACT_SUBREG to have one result type");
|
|
|
|
const auto &SrcRCDstRCPair =
|
|
SrcRC->getMatchingSubClassWithSubRegs(CGRegs, SubIdx);
|
|
assert(SrcRCDstRCPair->second && "Couldn't find a matching subclass");
|
|
M.addAction<ConstrainOperandToRegClassAction>(0, 0, *SrcRCDstRCPair->second);
|
|
M.addAction<ConstrainOperandToRegClassAction>(0, 1, *SrcRCDstRCPair->first);
|
|
|
|
// We're done with this pattern! It's eligible for GISel emission; return
|
|
// it.
|
|
++NumPatternImported;
|
|
return std::move(M);
|
|
}
|
|
|
|
M.addAction<ConstrainOperandsToDefinitionAction>(0);
|
|
|
|
// We're done with this pattern! It's eligible for GISel emission; return it.
|
|
++NumPatternImported;
|
|
return std::move(M);
|
|
}
|
|
|
|
// Emit imm predicate table and an enum to reference them with.
|
|
// The 'Predicate_' part of the name is redundant but eliminating it is more
|
|
// trouble than it's worth.
|
|
void GlobalISelEmitter::emitCxxPredicateFns(
|
|
raw_ostream &OS, StringRef CodeFieldName, StringRef TypeIdentifier,
|
|
StringRef ArgType, StringRef ArgName, StringRef AdditionalDeclarations,
|
|
std::function<bool(const Record *R)> Filter) {
|
|
std::vector<const Record *> MatchedRecords;
|
|
const auto &Defs = RK.getAllDerivedDefinitions("PatFrag");
|
|
std::copy_if(Defs.begin(), Defs.end(), std::back_inserter(MatchedRecords),
|
|
[&](Record *Record) {
|
|
return !Record->getValueAsString(CodeFieldName).empty() &&
|
|
Filter(Record);
|
|
});
|
|
|
|
if (!MatchedRecords.empty()) {
|
|
OS << "// PatFrag predicates.\n"
|
|
<< "enum {\n";
|
|
std::string EnumeratorSeparator =
|
|
(" = GIPFP_" + TypeIdentifier + "_Invalid + 1,\n").str();
|
|
for (const auto *Record : MatchedRecords) {
|
|
OS << " GIPFP_" << TypeIdentifier << "_Predicate_" << Record->getName()
|
|
<< EnumeratorSeparator;
|
|
EnumeratorSeparator = ",\n";
|
|
}
|
|
OS << "};\n";
|
|
}
|
|
|
|
OS << "bool " << Target.getName() << "InstructionSelector::test" << ArgName
|
|
<< "Predicate_" << TypeIdentifier << "(unsigned PredicateID, " << ArgType << " "
|
|
<< ArgName << ") const {\n"
|
|
<< AdditionalDeclarations;
|
|
if (!AdditionalDeclarations.empty())
|
|
OS << "\n";
|
|
if (!MatchedRecords.empty())
|
|
OS << " switch (PredicateID) {\n";
|
|
for (const auto *Record : MatchedRecords) {
|
|
OS << " case GIPFP_" << TypeIdentifier << "_Predicate_"
|
|
<< Record->getName() << ": {\n"
|
|
<< " " << Record->getValueAsString(CodeFieldName) << "\n"
|
|
<< " llvm_unreachable(\"" << CodeFieldName
|
|
<< " should have returned\");\n"
|
|
<< " return false;\n"
|
|
<< " }\n";
|
|
}
|
|
if (!MatchedRecords.empty())
|
|
OS << " }\n";
|
|
OS << " llvm_unreachable(\"Unknown predicate\");\n"
|
|
<< " return false;\n"
|
|
<< "}\n";
|
|
}
|
|
|
|
void GlobalISelEmitter::emitImmPredicateFns(
|
|
raw_ostream &OS, StringRef TypeIdentifier, StringRef ArgType,
|
|
std::function<bool(const Record *R)> Filter) {
|
|
return emitCxxPredicateFns(OS, "ImmediateCode", TypeIdentifier, ArgType,
|
|
"Imm", "", Filter);
|
|
}
|
|
|
|
void GlobalISelEmitter::emitMIPredicateFns(raw_ostream &OS) {
|
|
return emitCxxPredicateFns(
|
|
OS, "GISelPredicateCode", "MI", "const MachineInstr &", "MI",
|
|
" const MachineFunction &MF = *MI.getParent()->getParent();\n"
|
|
" const MachineRegisterInfo &MRI = MF.getRegInfo();\n"
|
|
" (void)MRI;",
|
|
[](const Record *R) { return true; });
|
|
}
|
|
|
|
template <class GroupT>
|
|
std::vector<Matcher *> GlobalISelEmitter::optimizeRules(
|
|
ArrayRef<Matcher *> Rules,
|
|
std::vector<std::unique_ptr<Matcher>> &MatcherStorage) {
|
|
|
|
std::vector<Matcher *> OptRules;
|
|
std::unique_ptr<GroupT> CurrentGroup = make_unique<GroupT>();
|
|
assert(CurrentGroup->empty() && "Newly created group isn't empty!");
|
|
unsigned NumGroups = 0;
|
|
|
|
auto ProcessCurrentGroup = [&]() {
|
|
if (CurrentGroup->empty())
|
|
// An empty group is good to be reused:
|
|
return;
|
|
|
|
// If the group isn't large enough to provide any benefit, move all the
|
|
// added rules out of it and make sure to re-create the group to properly
|
|
// re-initialize it:
|
|
if (CurrentGroup->size() < 2)
|
|
for (Matcher *M : CurrentGroup->matchers())
|
|
OptRules.push_back(M);
|
|
else {
|
|
CurrentGroup->finalize();
|
|
OptRules.push_back(CurrentGroup.get());
|
|
MatcherStorage.emplace_back(std::move(CurrentGroup));
|
|
++NumGroups;
|
|
}
|
|
CurrentGroup = make_unique<GroupT>();
|
|
};
|
|
for (Matcher *Rule : Rules) {
|
|
// Greedily add as many matchers as possible to the current group:
|
|
if (CurrentGroup->addMatcher(*Rule))
|
|
continue;
|
|
|
|
ProcessCurrentGroup();
|
|
assert(CurrentGroup->empty() && "A group wasn't properly re-initialized");
|
|
|
|
// Try to add the pending matcher to a newly created empty group:
|
|
if (!CurrentGroup->addMatcher(*Rule))
|
|
// If we couldn't add the matcher to an empty group, that group type
|
|
// doesn't support that kind of matchers at all, so just skip it:
|
|
OptRules.push_back(Rule);
|
|
}
|
|
ProcessCurrentGroup();
|
|
|
|
LLVM_DEBUG(dbgs() << "NumGroups: " << NumGroups << "\n");
|
|
assert(CurrentGroup->empty() && "The last group wasn't properly processed");
|
|
return OptRules;
|
|
}
|
|
|
|
MatchTable
|
|
GlobalISelEmitter::buildMatchTable(MutableArrayRef<RuleMatcher> Rules,
|
|
bool Optimize, bool WithCoverage) {
|
|
std::vector<Matcher *> InputRules;
|
|
for (Matcher &Rule : Rules)
|
|
InputRules.push_back(&Rule);
|
|
|
|
if (!Optimize)
|
|
return MatchTable::buildTable(InputRules, WithCoverage);
|
|
|
|
unsigned CurrentOrdering = 0;
|
|
StringMap<unsigned> OpcodeOrder;
|
|
for (RuleMatcher &Rule : Rules) {
|
|
const StringRef Opcode = Rule.getOpcode();
|
|
assert(!Opcode.empty() && "Didn't expect an undefined opcode");
|
|
if (OpcodeOrder.count(Opcode) == 0)
|
|
OpcodeOrder[Opcode] = CurrentOrdering++;
|
|
}
|
|
|
|
std::stable_sort(InputRules.begin(), InputRules.end(),
|
|
[&OpcodeOrder](const Matcher *A, const Matcher *B) {
|
|
auto *L = static_cast<const RuleMatcher *>(A);
|
|
auto *R = static_cast<const RuleMatcher *>(B);
|
|
return std::make_tuple(OpcodeOrder[L->getOpcode()],
|
|
L->getNumOperands()) <
|
|
std::make_tuple(OpcodeOrder[R->getOpcode()],
|
|
R->getNumOperands());
|
|
});
|
|
|
|
for (Matcher *Rule : InputRules)
|
|
Rule->optimize();
|
|
|
|
std::vector<std::unique_ptr<Matcher>> MatcherStorage;
|
|
std::vector<Matcher *> OptRules =
|
|
optimizeRules<GroupMatcher>(InputRules, MatcherStorage);
|
|
|
|
for (Matcher *Rule : OptRules)
|
|
Rule->optimize();
|
|
|
|
OptRules = optimizeRules<SwitchMatcher>(OptRules, MatcherStorage);
|
|
|
|
return MatchTable::buildTable(OptRules, WithCoverage);
|
|
}
|
|
|
|
void GroupMatcher::optimize() {
|
|
// Make sure we only sort by a specific predicate within a range of rules that
|
|
// all have that predicate checked against a specific value (not a wildcard):
|
|
auto F = Matchers.begin();
|
|
auto T = F;
|
|
auto E = Matchers.end();
|
|
while (T != E) {
|
|
while (T != E) {
|
|
auto *R = static_cast<RuleMatcher *>(*T);
|
|
if (!R->getFirstConditionAsRootType().get().isValid())
|
|
break;
|
|
++T;
|
|
}
|
|
std::stable_sort(F, T, [](Matcher *A, Matcher *B) {
|
|
auto *L = static_cast<RuleMatcher *>(A);
|
|
auto *R = static_cast<RuleMatcher *>(B);
|
|
return L->getFirstConditionAsRootType() <
|
|
R->getFirstConditionAsRootType();
|
|
});
|
|
if (T != E)
|
|
F = ++T;
|
|
}
|
|
GlobalISelEmitter::optimizeRules<GroupMatcher>(Matchers, MatcherStorage)
|
|
.swap(Matchers);
|
|
GlobalISelEmitter::optimizeRules<SwitchMatcher>(Matchers, MatcherStorage)
|
|
.swap(Matchers);
|
|
}
|
|
|
|
void GlobalISelEmitter::run(raw_ostream &OS) {
|
|
if (!UseCoverageFile.empty()) {
|
|
RuleCoverage = CodeGenCoverage();
|
|
auto RuleCoverageBufOrErr = MemoryBuffer::getFile(UseCoverageFile);
|
|
if (!RuleCoverageBufOrErr) {
|
|
PrintWarning(SMLoc(), "Missing rule coverage data");
|
|
RuleCoverage = None;
|
|
} else {
|
|
if (!RuleCoverage->parse(*RuleCoverageBufOrErr.get(), Target.getName())) {
|
|
PrintWarning(SMLoc(), "Ignoring invalid or missing rule coverage data");
|
|
RuleCoverage = None;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Track the run-time opcode values
|
|
gatherOpcodeValues();
|
|
// Track the run-time LLT ID values
|
|
gatherTypeIDValues();
|
|
|
|
// Track the GINodeEquiv definitions.
|
|
gatherNodeEquivs();
|
|
|
|
emitSourceFileHeader(("Global Instruction Selector for the " +
|
|
Target.getName() + " target").str(), OS);
|
|
std::vector<RuleMatcher> Rules;
|
|
// Look through the SelectionDAG patterns we found, possibly emitting some.
|
|
for (const PatternToMatch &Pat : CGP.ptms()) {
|
|
++NumPatternTotal;
|
|
|
|
auto MatcherOrErr = runOnPattern(Pat);
|
|
|
|
// The pattern analysis can fail, indicating an unsupported pattern.
|
|
// Report that if we've been asked to do so.
|
|
if (auto Err = MatcherOrErr.takeError()) {
|
|
if (WarnOnSkippedPatterns) {
|
|
PrintWarning(Pat.getSrcRecord()->getLoc(),
|
|
"Skipped pattern: " + toString(std::move(Err)));
|
|
} else {
|
|
consumeError(std::move(Err));
|
|
}
|
|
++NumPatternImportsSkipped;
|
|
continue;
|
|
}
|
|
|
|
if (RuleCoverage) {
|
|
if (RuleCoverage->isCovered(MatcherOrErr->getRuleID()))
|
|
++NumPatternsTested;
|
|
else
|
|
PrintWarning(Pat.getSrcRecord()->getLoc(),
|
|
"Pattern is not covered by a test");
|
|
}
|
|
Rules.push_back(std::move(MatcherOrErr.get()));
|
|
}
|
|
|
|
// Comparison function to order records by name.
|
|
auto orderByName = [](const Record *A, const Record *B) {
|
|
return A->getName() < B->getName();
|
|
};
|
|
|
|
std::vector<Record *> ComplexPredicates =
|
|
RK.getAllDerivedDefinitions("GIComplexOperandMatcher");
|
|
llvm::sort(ComplexPredicates, orderByName);
|
|
|
|
std::vector<Record *> CustomRendererFns =
|
|
RK.getAllDerivedDefinitions("GICustomOperandRenderer");
|
|
llvm::sort(CustomRendererFns, orderByName);
|
|
|
|
unsigned MaxTemporaries = 0;
|
|
for (const auto &Rule : Rules)
|
|
MaxTemporaries = std::max(MaxTemporaries, Rule.countRendererFns());
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_PREDICATE_BITSET\n"
|
|
<< "const unsigned MAX_SUBTARGET_PREDICATES = " << SubtargetFeatures.size()
|
|
<< ";\n"
|
|
<< "using PredicateBitset = "
|
|
"llvm::PredicateBitsetImpl<MAX_SUBTARGET_PREDICATES>;\n"
|
|
<< "#endif // ifdef GET_GLOBALISEL_PREDICATE_BITSET\n\n";
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_TEMPORARIES_DECL\n"
|
|
<< " mutable MatcherState State;\n"
|
|
<< " typedef "
|
|
"ComplexRendererFns("
|
|
<< Target.getName()
|
|
<< "InstructionSelector::*ComplexMatcherMemFn)(MachineOperand &) const;\n"
|
|
|
|
<< " typedef void(" << Target.getName()
|
|
<< "InstructionSelector::*CustomRendererFn)(MachineInstrBuilder &, const "
|
|
"MachineInstr&) "
|
|
"const;\n"
|
|
<< " const ISelInfoTy<PredicateBitset, ComplexMatcherMemFn, "
|
|
"CustomRendererFn> "
|
|
"ISelInfo;\n";
|
|
OS << " static " << Target.getName()
|
|
<< "InstructionSelector::ComplexMatcherMemFn ComplexPredicateFns[];\n"
|
|
<< " static " << Target.getName()
|
|
<< "InstructionSelector::CustomRendererFn CustomRenderers[];\n"
|
|
<< " bool testImmPredicate_I64(unsigned PredicateID, int64_t Imm) const "
|
|
"override;\n"
|
|
<< " bool testImmPredicate_APInt(unsigned PredicateID, const APInt &Imm) "
|
|
"const override;\n"
|
|
<< " bool testImmPredicate_APFloat(unsigned PredicateID, const APFloat "
|
|
"&Imm) const override;\n"
|
|
<< " const int64_t *getMatchTable() const override;\n"
|
|
<< " bool testMIPredicate_MI(unsigned PredicateID, const MachineInstr &MI) "
|
|
"const override;\n"
|
|
<< "#endif // ifdef GET_GLOBALISEL_TEMPORARIES_DECL\n\n";
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_TEMPORARIES_INIT\n"
|
|
<< ", State(" << MaxTemporaries << "),\n"
|
|
<< "ISelInfo(TypeObjects, NumTypeObjects, FeatureBitsets"
|
|
<< ", ComplexPredicateFns, CustomRenderers)\n"
|
|
<< "#endif // ifdef GET_GLOBALISEL_TEMPORARIES_INIT\n\n";
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_IMPL\n";
|
|
SubtargetFeatureInfo::emitSubtargetFeatureBitEnumeration(SubtargetFeatures,
|
|
OS);
|
|
|
|
// Separate subtarget features by how often they must be recomputed.
|
|
SubtargetFeatureInfoMap ModuleFeatures;
|
|
std::copy_if(SubtargetFeatures.begin(), SubtargetFeatures.end(),
|
|
std::inserter(ModuleFeatures, ModuleFeatures.end()),
|
|
[](const SubtargetFeatureInfoMap::value_type &X) {
|
|
return !X.second.mustRecomputePerFunction();
|
|
});
|
|
SubtargetFeatureInfoMap FunctionFeatures;
|
|
std::copy_if(SubtargetFeatures.begin(), SubtargetFeatures.end(),
|
|
std::inserter(FunctionFeatures, FunctionFeatures.end()),
|
|
[](const SubtargetFeatureInfoMap::value_type &X) {
|
|
return X.second.mustRecomputePerFunction();
|
|
});
|
|
|
|
SubtargetFeatureInfo::emitComputeAvailableFeatures(
|
|
Target.getName(), "InstructionSelector", "computeAvailableModuleFeatures",
|
|
ModuleFeatures, OS);
|
|
SubtargetFeatureInfo::emitComputeAvailableFeatures(
|
|
Target.getName(), "InstructionSelector",
|
|
"computeAvailableFunctionFeatures", FunctionFeatures, OS,
|
|
"const MachineFunction *MF");
|
|
|
|
// Emit a table containing the LLT objects needed by the matcher and an enum
|
|
// for the matcher to reference them with.
|
|
std::vector<LLTCodeGen> TypeObjects;
|
|
for (const auto &Ty : KnownTypes)
|
|
TypeObjects.push_back(Ty);
|
|
llvm::sort(TypeObjects);
|
|
OS << "// LLT Objects.\n"
|
|
<< "enum {\n";
|
|
for (const auto &TypeObject : TypeObjects) {
|
|
OS << " ";
|
|
TypeObject.emitCxxEnumValue(OS);
|
|
OS << ",\n";
|
|
}
|
|
OS << "};\n";
|
|
OS << "const static size_t NumTypeObjects = " << TypeObjects.size() << ";\n"
|
|
<< "const static LLT TypeObjects[] = {\n";
|
|
for (const auto &TypeObject : TypeObjects) {
|
|
OS << " ";
|
|
TypeObject.emitCxxConstructorCall(OS);
|
|
OS << ",\n";
|
|
}
|
|
OS << "};\n\n";
|
|
|
|
// Emit a table containing the PredicateBitsets objects needed by the matcher
|
|
// and an enum for the matcher to reference them with.
|
|
std::vector<std::vector<Record *>> FeatureBitsets;
|
|
for (auto &Rule : Rules)
|
|
FeatureBitsets.push_back(Rule.getRequiredFeatures());
|
|
llvm::sort(FeatureBitsets, [&](const std::vector<Record *> &A,
|
|
const std::vector<Record *> &B) {
|
|
if (A.size() < B.size())
|
|
return true;
|
|
if (A.size() > B.size())
|
|
return false;
|
|
for (const auto &Pair : zip(A, B)) {
|
|
if (std::get<0>(Pair)->getName() < std::get<1>(Pair)->getName())
|
|
return true;
|
|
if (std::get<0>(Pair)->getName() > std::get<1>(Pair)->getName())
|
|
return false;
|
|
}
|
|
return false;
|
|
});
|
|
FeatureBitsets.erase(
|
|
std::unique(FeatureBitsets.begin(), FeatureBitsets.end()),
|
|
FeatureBitsets.end());
|
|
OS << "// Feature bitsets.\n"
|
|
<< "enum {\n"
|
|
<< " GIFBS_Invalid,\n";
|
|
for (const auto &FeatureBitset : FeatureBitsets) {
|
|
if (FeatureBitset.empty())
|
|
continue;
|
|
OS << " " << getNameForFeatureBitset(FeatureBitset) << ",\n";
|
|
}
|
|
OS << "};\n"
|
|
<< "const static PredicateBitset FeatureBitsets[] {\n"
|
|
<< " {}, // GIFBS_Invalid\n";
|
|
for (const auto &FeatureBitset : FeatureBitsets) {
|
|
if (FeatureBitset.empty())
|
|
continue;
|
|
OS << " {";
|
|
for (const auto &Feature : FeatureBitset) {
|
|
const auto &I = SubtargetFeatures.find(Feature);
|
|
assert(I != SubtargetFeatures.end() && "Didn't import predicate?");
|
|
OS << I->second.getEnumBitName() << ", ";
|
|
}
|
|
OS << "},\n";
|
|
}
|
|
OS << "};\n\n";
|
|
|
|
// Emit complex predicate table and an enum to reference them with.
|
|
OS << "// ComplexPattern predicates.\n"
|
|
<< "enum {\n"
|
|
<< " GICP_Invalid,\n";
|
|
for (const auto &Record : ComplexPredicates)
|
|
OS << " GICP_" << Record->getName() << ",\n";
|
|
OS << "};\n"
|
|
<< "// See constructor for table contents\n\n";
|
|
|
|
emitImmPredicateFns(OS, "I64", "int64_t", [](const Record *R) {
|
|
bool Unset;
|
|
return !R->getValueAsBitOrUnset("IsAPFloat", Unset) &&
|
|
!R->getValueAsBit("IsAPInt");
|
|
});
|
|
emitImmPredicateFns(OS, "APFloat", "const APFloat &", [](const Record *R) {
|
|
bool Unset;
|
|
return R->getValueAsBitOrUnset("IsAPFloat", Unset);
|
|
});
|
|
emitImmPredicateFns(OS, "APInt", "const APInt &", [](const Record *R) {
|
|
return R->getValueAsBit("IsAPInt");
|
|
});
|
|
emitMIPredicateFns(OS);
|
|
OS << "\n";
|
|
|
|
OS << Target.getName() << "InstructionSelector::ComplexMatcherMemFn\n"
|
|
<< Target.getName() << "InstructionSelector::ComplexPredicateFns[] = {\n"
|
|
<< " nullptr, // GICP_Invalid\n";
|
|
for (const auto &Record : ComplexPredicates)
|
|
OS << " &" << Target.getName()
|
|
<< "InstructionSelector::" << Record->getValueAsString("MatcherFn")
|
|
<< ", // " << Record->getName() << "\n";
|
|
OS << "};\n\n";
|
|
|
|
OS << "// Custom renderers.\n"
|
|
<< "enum {\n"
|
|
<< " GICR_Invalid,\n";
|
|
for (const auto &Record : CustomRendererFns)
|
|
OS << " GICR_" << Record->getValueAsString("RendererFn") << ", \n";
|
|
OS << "};\n";
|
|
|
|
OS << Target.getName() << "InstructionSelector::CustomRendererFn\n"
|
|
<< Target.getName() << "InstructionSelector::CustomRenderers[] = {\n"
|
|
<< " nullptr, // GICP_Invalid\n";
|
|
for (const auto &Record : CustomRendererFns)
|
|
OS << " &" << Target.getName()
|
|
<< "InstructionSelector::" << Record->getValueAsString("RendererFn")
|
|
<< ", // " << Record->getName() << "\n";
|
|
OS << "};\n\n";
|
|
|
|
std::stable_sort(Rules.begin(), Rules.end(), [&](const RuleMatcher &A,
|
|
const RuleMatcher &B) {
|
|
int ScoreA = RuleMatcherScores[A.getRuleID()];
|
|
int ScoreB = RuleMatcherScores[B.getRuleID()];
|
|
if (ScoreA > ScoreB)
|
|
return true;
|
|
if (ScoreB > ScoreA)
|
|
return false;
|
|
if (A.isHigherPriorityThan(B)) {
|
|
assert(!B.isHigherPriorityThan(A) && "Cannot be more important "
|
|
"and less important at "
|
|
"the same time");
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
|
|
OS << "bool " << Target.getName()
|
|
<< "InstructionSelector::selectImpl(MachineInstr &I, CodeGenCoverage "
|
|
"&CoverageInfo) const {\n"
|
|
<< " MachineFunction &MF = *I.getParent()->getParent();\n"
|
|
<< " MachineRegisterInfo &MRI = MF.getRegInfo();\n"
|
|
<< " // FIXME: This should be computed on a per-function basis rather "
|
|
"than per-insn.\n"
|
|
<< " AvailableFunctionFeatures = computeAvailableFunctionFeatures(&STI, "
|
|
"&MF);\n"
|
|
<< " const PredicateBitset AvailableFeatures = getAvailableFeatures();\n"
|
|
<< " NewMIVector OutMIs;\n"
|
|
<< " State.MIs.clear();\n"
|
|
<< " State.MIs.push_back(&I);\n\n"
|
|
<< " if (executeMatchTable(*this, OutMIs, State, ISelInfo"
|
|
<< ", getMatchTable(), TII, MRI, TRI, RBI, AvailableFeatures"
|
|
<< ", CoverageInfo)) {\n"
|
|
<< " return true;\n"
|
|
<< " }\n\n"
|
|
<< " return false;\n"
|
|
<< "}\n\n";
|
|
|
|
const MatchTable Table =
|
|
buildMatchTable(Rules, OptimizeMatchTable, GenerateCoverage);
|
|
OS << "const int64_t *" << Target.getName()
|
|
<< "InstructionSelector::getMatchTable() const {\n";
|
|
Table.emitDeclaration(OS);
|
|
OS << " return ";
|
|
Table.emitUse(OS);
|
|
OS << ";\n}\n";
|
|
OS << "#endif // ifdef GET_GLOBALISEL_IMPL\n";
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_PREDICATES_DECL\n"
|
|
<< "PredicateBitset AvailableModuleFeatures;\n"
|
|
<< "mutable PredicateBitset AvailableFunctionFeatures;\n"
|
|
<< "PredicateBitset getAvailableFeatures() const {\n"
|
|
<< " return AvailableModuleFeatures | AvailableFunctionFeatures;\n"
|
|
<< "}\n"
|
|
<< "PredicateBitset\n"
|
|
<< "computeAvailableModuleFeatures(const " << Target.getName()
|
|
<< "Subtarget *Subtarget) const;\n"
|
|
<< "PredicateBitset\n"
|
|
<< "computeAvailableFunctionFeatures(const " << Target.getName()
|
|
<< "Subtarget *Subtarget,\n"
|
|
<< " const MachineFunction *MF) const;\n"
|
|
<< "#endif // ifdef GET_GLOBALISEL_PREDICATES_DECL\n";
|
|
|
|
OS << "#ifdef GET_GLOBALISEL_PREDICATES_INIT\n"
|
|
<< "AvailableModuleFeatures(computeAvailableModuleFeatures(&STI)),\n"
|
|
<< "AvailableFunctionFeatures()\n"
|
|
<< "#endif // ifdef GET_GLOBALISEL_PREDICATES_INIT\n";
|
|
}
|
|
|
|
void GlobalISelEmitter::declareSubtargetFeature(Record *Predicate) {
|
|
if (SubtargetFeatures.count(Predicate) == 0)
|
|
SubtargetFeatures.emplace(
|
|
Predicate, SubtargetFeatureInfo(Predicate, SubtargetFeatures.size()));
|
|
}
|
|
|
|
void RuleMatcher::optimize() {
|
|
for (auto &Item : InsnVariableIDs) {
|
|
InstructionMatcher &InsnMatcher = *Item.first;
|
|
for (auto &OM : InsnMatcher.operands()) {
|
|
// Complex Patterns are usually expensive and they relatively rarely fail
|
|
// on their own: more often we end up throwing away all the work done by a
|
|
// matching part of a complex pattern because some other part of the
|
|
// enclosing pattern didn't match. All of this makes it beneficial to
|
|
// delay complex patterns until the very end of the rule matching,
|
|
// especially for targets having lots of complex patterns.
|
|
for (auto &OP : OM->predicates())
|
|
if (isa<ComplexPatternOperandMatcher>(OP))
|
|
EpilogueMatchers.emplace_back(std::move(OP));
|
|
OM->eraseNullPredicates();
|
|
}
|
|
InsnMatcher.optimize();
|
|
}
|
|
llvm::sort(EpilogueMatchers, [](const std::unique_ptr<PredicateMatcher> &L,
|
|
const std::unique_ptr<PredicateMatcher> &R) {
|
|
return std::make_tuple(L->getKind(), L->getInsnVarID(), L->getOpIdx()) <
|
|
std::make_tuple(R->getKind(), R->getInsnVarID(), R->getOpIdx());
|
|
});
|
|
}
|
|
|
|
bool RuleMatcher::hasFirstCondition() const {
|
|
if (insnmatchers_empty())
|
|
return false;
|
|
InstructionMatcher &Matcher = insnmatchers_front();
|
|
if (!Matcher.predicates_empty())
|
|
return true;
|
|
for (auto &OM : Matcher.operands())
|
|
for (auto &OP : OM->predicates())
|
|
if (!isa<InstructionOperandMatcher>(OP))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
const PredicateMatcher &RuleMatcher::getFirstCondition() const {
|
|
assert(!insnmatchers_empty() &&
|
|
"Trying to get a condition from an empty RuleMatcher");
|
|
|
|
InstructionMatcher &Matcher = insnmatchers_front();
|
|
if (!Matcher.predicates_empty())
|
|
return **Matcher.predicates_begin();
|
|
// If there is no more predicate on the instruction itself, look at its
|
|
// operands.
|
|
for (auto &OM : Matcher.operands())
|
|
for (auto &OP : OM->predicates())
|
|
if (!isa<InstructionOperandMatcher>(OP))
|
|
return *OP;
|
|
|
|
llvm_unreachable("Trying to get a condition from an InstructionMatcher with "
|
|
"no conditions");
|
|
}
|
|
|
|
std::unique_ptr<PredicateMatcher> RuleMatcher::popFirstCondition() {
|
|
assert(!insnmatchers_empty() &&
|
|
"Trying to pop a condition from an empty RuleMatcher");
|
|
|
|
InstructionMatcher &Matcher = insnmatchers_front();
|
|
if (!Matcher.predicates_empty())
|
|
return Matcher.predicates_pop_front();
|
|
// If there is no more predicate on the instruction itself, look at its
|
|
// operands.
|
|
for (auto &OM : Matcher.operands())
|
|
for (auto &OP : OM->predicates())
|
|
if (!isa<InstructionOperandMatcher>(OP)) {
|
|
std::unique_ptr<PredicateMatcher> Result = std::move(OP);
|
|
OM->eraseNullPredicates();
|
|
return Result;
|
|
}
|
|
|
|
llvm_unreachable("Trying to pop a condition from an InstructionMatcher with "
|
|
"no conditions");
|
|
}
|
|
|
|
bool GroupMatcher::candidateConditionMatches(
|
|
const PredicateMatcher &Predicate) const {
|
|
|
|
if (empty()) {
|
|
// Sharing predicates for nested instructions is not supported yet as we
|
|
// currently don't hoist the GIM_RecordInsn's properly, therefore we can
|
|
// only work on the original root instruction (InsnVarID == 0):
|
|
if (Predicate.getInsnVarID() != 0)
|
|
return false;
|
|
// ... otherwise an empty group can handle any predicate with no specific
|
|
// requirements:
|
|
return true;
|
|
}
|
|
|
|
const Matcher &Representative = **Matchers.begin();
|
|
const auto &RepresentativeCondition = Representative.getFirstCondition();
|
|
// ... if not empty, the group can only accomodate matchers with the exact
|
|
// same first condition:
|
|
return Predicate.isIdentical(RepresentativeCondition);
|
|
}
|
|
|
|
bool GroupMatcher::addMatcher(Matcher &Candidate) {
|
|
if (!Candidate.hasFirstCondition())
|
|
return false;
|
|
|
|
const PredicateMatcher &Predicate = Candidate.getFirstCondition();
|
|
if (!candidateConditionMatches(Predicate))
|
|
return false;
|
|
|
|
Matchers.push_back(&Candidate);
|
|
return true;
|
|
}
|
|
|
|
void GroupMatcher::finalize() {
|
|
assert(Conditions.empty() && "Already finalized?");
|
|
if (empty())
|
|
return;
|
|
|
|
Matcher &FirstRule = **Matchers.begin();
|
|
for (;;) {
|
|
// All the checks are expected to succeed during the first iteration:
|
|
for (const auto &Rule : Matchers)
|
|
if (!Rule->hasFirstCondition())
|
|
return;
|
|
const auto &FirstCondition = FirstRule.getFirstCondition();
|
|
for (unsigned I = 1, E = Matchers.size(); I < E; ++I)
|
|
if (!Matchers[I]->getFirstCondition().isIdentical(FirstCondition))
|
|
return;
|
|
|
|
Conditions.push_back(FirstRule.popFirstCondition());
|
|
for (unsigned I = 1, E = Matchers.size(); I < E; ++I)
|
|
Matchers[I]->popFirstCondition();
|
|
}
|
|
}
|
|
|
|
void GroupMatcher::emit(MatchTable &Table) {
|
|
unsigned LabelID = ~0U;
|
|
if (!Conditions.empty()) {
|
|
LabelID = Table.allocateLabelID();
|
|
Table << MatchTable::Opcode("GIM_Try", +1)
|
|
<< MatchTable::Comment("On fail goto")
|
|
<< MatchTable::JumpTarget(LabelID) << MatchTable::LineBreak;
|
|
}
|
|
for (auto &Condition : Conditions)
|
|
Condition->emitPredicateOpcodes(
|
|
Table, *static_cast<RuleMatcher *>(*Matchers.begin()));
|
|
|
|
for (const auto &M : Matchers)
|
|
M->emit(Table);
|
|
|
|
// Exit the group
|
|
if (!Conditions.empty())
|
|
Table << MatchTable::Opcode("GIM_Reject", -1) << MatchTable::LineBreak
|
|
<< MatchTable::Label(LabelID);
|
|
}
|
|
|
|
bool SwitchMatcher::isSupportedPredicateType(const PredicateMatcher &P) {
|
|
return isa<InstructionOpcodeMatcher>(P) || isa<LLTOperandMatcher>(P);
|
|
}
|
|
|
|
bool SwitchMatcher::candidateConditionMatches(
|
|
const PredicateMatcher &Predicate) const {
|
|
|
|
if (empty()) {
|
|
// Sharing predicates for nested instructions is not supported yet as we
|
|
// currently don't hoist the GIM_RecordInsn's properly, therefore we can
|
|
// only work on the original root instruction (InsnVarID == 0):
|
|
if (Predicate.getInsnVarID() != 0)
|
|
return false;
|
|
// ... while an attempt to add even a root matcher to an empty SwitchMatcher
|
|
// could fail as not all the types of conditions are supported:
|
|
if (!isSupportedPredicateType(Predicate))
|
|
return false;
|
|
// ... or the condition might not have a proper implementation of
|
|
// getValue() / isIdenticalDownToValue() yet:
|
|
if (!Predicate.hasValue())
|
|
return false;
|
|
// ... otherwise an empty Switch can accomodate the condition with no
|
|
// further requirements:
|
|
return true;
|
|
}
|
|
|
|
const Matcher &CaseRepresentative = **Matchers.begin();
|
|
const auto &RepresentativeCondition = CaseRepresentative.getFirstCondition();
|
|
// Switch-cases must share the same kind of condition and path to the value it
|
|
// checks:
|
|
if (!Predicate.isIdenticalDownToValue(RepresentativeCondition))
|
|
return false;
|
|
|
|
const auto Value = Predicate.getValue();
|
|
// ... but be unique with respect to the actual value they check:
|
|
return Values.count(Value) == 0;
|
|
}
|
|
|
|
bool SwitchMatcher::addMatcher(Matcher &Candidate) {
|
|
if (!Candidate.hasFirstCondition())
|
|
return false;
|
|
|
|
const PredicateMatcher &Predicate = Candidate.getFirstCondition();
|
|
if (!candidateConditionMatches(Predicate))
|
|
return false;
|
|
const auto Value = Predicate.getValue();
|
|
Values.insert(Value);
|
|
|
|
Matchers.push_back(&Candidate);
|
|
return true;
|
|
}
|
|
|
|
void SwitchMatcher::finalize() {
|
|
assert(Condition == nullptr && "Already finalized");
|
|
assert(Values.size() == Matchers.size() && "Broken SwitchMatcher");
|
|
if (empty())
|
|
return;
|
|
|
|
std::stable_sort(Matchers.begin(), Matchers.end(),
|
|
[](const Matcher *L, const Matcher *R) {
|
|
return L->getFirstCondition().getValue() <
|
|
R->getFirstCondition().getValue();
|
|
});
|
|
Condition = Matchers[0]->popFirstCondition();
|
|
for (unsigned I = 1, E = Values.size(); I < E; ++I)
|
|
Matchers[I]->popFirstCondition();
|
|
}
|
|
|
|
void SwitchMatcher::emitPredicateSpecificOpcodes(const PredicateMatcher &P,
|
|
MatchTable &Table) {
|
|
assert(isSupportedPredicateType(P) && "Predicate type is not supported");
|
|
|
|
if (const auto *Condition = dyn_cast<InstructionOpcodeMatcher>(&P)) {
|
|
Table << MatchTable::Opcode("GIM_SwitchOpcode") << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(Condition->getInsnVarID());
|
|
return;
|
|
}
|
|
if (const auto *Condition = dyn_cast<LLTOperandMatcher>(&P)) {
|
|
Table << MatchTable::Opcode("GIM_SwitchType") << MatchTable::Comment("MI")
|
|
<< MatchTable::IntValue(Condition->getInsnVarID())
|
|
<< MatchTable::Comment("Op")
|
|
<< MatchTable::IntValue(Condition->getOpIdx());
|
|
return;
|
|
}
|
|
|
|
llvm_unreachable("emitPredicateSpecificOpcodes is broken: can not handle a "
|
|
"predicate type that is claimed to be supported");
|
|
}
|
|
|
|
void SwitchMatcher::emit(MatchTable &Table) {
|
|
assert(Values.size() == Matchers.size() && "Broken SwitchMatcher");
|
|
if (empty())
|
|
return;
|
|
assert(Condition != nullptr &&
|
|
"Broken SwitchMatcher, hasn't been finalized?");
|
|
|
|
std::vector<unsigned> LabelIDs(Values.size());
|
|
std::generate(LabelIDs.begin(), LabelIDs.end(),
|
|
[&Table]() { return Table.allocateLabelID(); });
|
|
const unsigned Default = Table.allocateLabelID();
|
|
|
|
const int64_t LowerBound = Values.begin()->getRawValue();
|
|
const int64_t UpperBound = Values.rbegin()->getRawValue() + 1;
|
|
|
|
emitPredicateSpecificOpcodes(*Condition, Table);
|
|
|
|
Table << MatchTable::Comment("[") << MatchTable::IntValue(LowerBound)
|
|
<< MatchTable::IntValue(UpperBound) << MatchTable::Comment(")")
|
|
<< MatchTable::Comment("default:") << MatchTable::JumpTarget(Default);
|
|
|
|
int64_t J = LowerBound;
|
|
auto VI = Values.begin();
|
|
for (unsigned I = 0, E = Values.size(); I < E; ++I) {
|
|
auto V = *VI++;
|
|
while (J++ < V.getRawValue())
|
|
Table << MatchTable::IntValue(0);
|
|
V.turnIntoComment();
|
|
Table << MatchTable::LineBreak << V << MatchTable::JumpTarget(LabelIDs[I]);
|
|
}
|
|
Table << MatchTable::LineBreak;
|
|
|
|
for (unsigned I = 0, E = Values.size(); I < E; ++I) {
|
|
Table << MatchTable::Label(LabelIDs[I]);
|
|
Matchers[I]->emit(Table);
|
|
Table << MatchTable::Opcode("GIM_Reject") << MatchTable::LineBreak;
|
|
}
|
|
Table << MatchTable::Label(Default);
|
|
}
|
|
|
|
unsigned OperandMatcher::getInsnVarID() const { return Insn.getInsnVarID(); }
|
|
|
|
} // end anonymous namespace
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
namespace llvm {
|
|
void EmitGlobalISel(RecordKeeper &RK, raw_ostream &OS) {
|
|
GlobalISelEmitter(RK).run(OS);
|
|
}
|
|
} // End llvm namespace
|