mirror of
https://github.com/RPCS3/llvm-mirror.git
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5697956ae9
> This reapplies c0f3dfb9, which was reverted following the discovery of > crashes on linux kernel and chromium builds - these issues have since > been fixed, allowing this patch to re-land. This reverts commit 36ec97f76ac0d8be76fb16ac521f55126766267d. The change caused non-determinism in the compiler, see comments on the code review at https://reviews.llvm.org/D91722. Reverting to unbreak people's builds until that can be addressed. This also reverts the follow-up "[DebugInfo] Limit the number of values that may be referenced by a dbg.value" in a0bd6105d80698c53ceaa64bbe6e3b7e7bbf99ee.
488 lines
17 KiB
C++
488 lines
17 KiB
C++
//===-- InstrinsicInst.cpp - Intrinsic Instruction Wrappers ---------------===//
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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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// This file implements methods that make it really easy to deal with intrinsic
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// functions.
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//
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// All intrinsic function calls are instances of the call instruction, so these
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// are all subclasses of the CallInst class. Note that none of these classes
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// has state or virtual methods, which is an important part of this gross/neat
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// hack working.
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//
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// In some cases, arguments to intrinsics need to be generic and are defined as
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// type pointer to empty struct { }*. To access the real item of interest the
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// cast instruction needs to be stripped away.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DebugInfoMetadata.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/IR/PatternMatch.h"
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#include "llvm/IR/Statepoint.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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/// DbgVariableIntrinsic - This is the common base class for debug info
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/// intrinsics for variables.
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///
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iterator_range<DbgVariableIntrinsic::location_op_iterator>
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DbgVariableIntrinsic::location_ops() const {
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auto *MD = getRawLocation();
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assert(MD && "First operand of DbgVariableIntrinsic should be non-null.");
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// If operand is ValueAsMetadata, return a range over just that operand.
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if (auto *VAM = dyn_cast<ValueAsMetadata>(MD)) {
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return {location_op_iterator(VAM), location_op_iterator(VAM + 1)};
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}
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// If operand is DIArgList, return a range over its args.
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if (auto *AL = dyn_cast<DIArgList>(MD))
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return {location_op_iterator(AL->args_begin()),
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location_op_iterator(AL->args_end())};
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// Operand must be an empty metadata tuple, so return empty iterator.
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return {location_op_iterator(static_cast<ValueAsMetadata *>(nullptr)),
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location_op_iterator(static_cast<ValueAsMetadata *>(nullptr))};
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}
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Value *DbgVariableIntrinsic::getVariableLocationOp(unsigned OpIdx) const {
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auto *MD = getRawLocation();
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assert(MD && "First operand of DbgVariableIntrinsic should be non-null.");
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if (auto *AL = dyn_cast<DIArgList>(MD))
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return AL->getArgs()[OpIdx]->getValue();
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if (isa<MDNode>(MD))
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return nullptr;
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assert(
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isa<ValueAsMetadata>(MD) &&
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"Attempted to get location operand from DbgVariableIntrinsic with none.");
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auto *V = cast<ValueAsMetadata>(MD);
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assert(OpIdx == 0 && "Operand Index must be 0 for a debug intrinsic with a "
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"single location operand.");
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return V->getValue();
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}
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static ValueAsMetadata *getAsMetadata(Value *V) {
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return isa<MetadataAsValue>(V) ? dyn_cast<ValueAsMetadata>(
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cast<MetadataAsValue>(V)->getMetadata())
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: ValueAsMetadata::get(V);
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}
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void DbgVariableIntrinsic::replaceVariableLocationOp(Value *OldValue,
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Value *NewValue) {
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assert(NewValue && "Values must be non-null");
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auto Locations = location_ops();
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auto OldIt = find(Locations, OldValue);
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assert(OldIt != Locations.end() && "OldValue must be a current location");
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if (!hasArgList()) {
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Value *NewOperand = isa<MetadataAsValue>(NewValue)
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? NewValue
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: MetadataAsValue::get(
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getContext(), ValueAsMetadata::get(NewValue));
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return setArgOperand(0, NewOperand);
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}
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SmallVector<ValueAsMetadata *, 4> MDs;
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ValueAsMetadata *NewOperand = getAsMetadata(NewValue);
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for (auto *VMD : Locations)
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MDs.push_back(VMD == *OldIt ? NewOperand : getAsMetadata(VMD));
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setArgOperand(
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0, MetadataAsValue::get(getContext(), DIArgList::get(getContext(), MDs)));
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}
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void DbgVariableIntrinsic::replaceVariableLocationOp(unsigned OpIdx,
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Value *NewValue) {
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assert(OpIdx < getNumVariableLocationOps() && "Invalid Operand Index");
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if (!hasArgList()) {
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Value *NewOperand = isa<MetadataAsValue>(NewValue)
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? NewValue
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: MetadataAsValue::get(
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getContext(), ValueAsMetadata::get(NewValue));
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return setArgOperand(0, NewOperand);
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}
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SmallVector<ValueAsMetadata *, 4> MDs;
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ValueAsMetadata *NewOperand = getAsMetadata(NewValue);
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for (unsigned Idx = 0; Idx < getNumVariableLocationOps(); ++Idx)
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MDs.push_back(Idx == OpIdx ? NewOperand
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: getAsMetadata(getVariableLocationOp(Idx)));
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setArgOperand(
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0, MetadataAsValue::get(getContext(), DIArgList::get(getContext(), MDs)));
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}
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Optional<uint64_t> DbgVariableIntrinsic::getFragmentSizeInBits() const {
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if (auto Fragment = getExpression()->getFragmentInfo())
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return Fragment->SizeInBits;
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return getVariable()->getSizeInBits();
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}
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int llvm::Intrinsic::lookupLLVMIntrinsicByName(ArrayRef<const char *> NameTable,
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StringRef Name) {
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assert(Name.startswith("llvm."));
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// Do successive binary searches of the dotted name components. For
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// "llvm.gc.experimental.statepoint.p1i8.p1i32", we will find the range of
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// intrinsics starting with "llvm.gc", then "llvm.gc.experimental", then
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// "llvm.gc.experimental.statepoint", and then we will stop as the range is
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// size 1. During the search, we can skip the prefix that we already know is
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// identical. By using strncmp we consider names with differing suffixes to
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// be part of the equal range.
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size_t CmpEnd = 4; // Skip the "llvm" component.
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const char *const *Low = NameTable.begin();
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const char *const *High = NameTable.end();
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const char *const *LastLow = Low;
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while (CmpEnd < Name.size() && High - Low > 0) {
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size_t CmpStart = CmpEnd;
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CmpEnd = Name.find('.', CmpStart + 1);
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CmpEnd = CmpEnd == StringRef::npos ? Name.size() : CmpEnd;
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auto Cmp = [CmpStart, CmpEnd](const char *LHS, const char *RHS) {
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return strncmp(LHS + CmpStart, RHS + CmpStart, CmpEnd - CmpStart) < 0;
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};
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LastLow = Low;
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std::tie(Low, High) = std::equal_range(Low, High, Name.data(), Cmp);
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}
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if (High - Low > 0)
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LastLow = Low;
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if (LastLow == NameTable.end())
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return -1;
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StringRef NameFound = *LastLow;
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if (Name == NameFound ||
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(Name.startswith(NameFound) && Name[NameFound.size()] == '.'))
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return LastLow - NameTable.begin();
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return -1;
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}
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Value *InstrProfIncrementInst::getStep() const {
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if (InstrProfIncrementInstStep::classof(this)) {
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return const_cast<Value *>(getArgOperand(4));
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}
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const Module *M = getModule();
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LLVMContext &Context = M->getContext();
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return ConstantInt::get(Type::getInt64Ty(Context), 1);
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}
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Optional<RoundingMode> ConstrainedFPIntrinsic::getRoundingMode() const {
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unsigned NumOperands = getNumArgOperands();
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Metadata *MD = nullptr;
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auto *MAV = dyn_cast<MetadataAsValue>(getArgOperand(NumOperands - 2));
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if (MAV)
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MD = MAV->getMetadata();
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if (!MD || !isa<MDString>(MD))
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return None;
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return StrToRoundingMode(cast<MDString>(MD)->getString());
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}
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Optional<fp::ExceptionBehavior>
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ConstrainedFPIntrinsic::getExceptionBehavior() const {
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unsigned NumOperands = getNumArgOperands();
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Metadata *MD = nullptr;
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auto *MAV = dyn_cast<MetadataAsValue>(getArgOperand(NumOperands - 1));
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if (MAV)
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MD = MAV->getMetadata();
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if (!MD || !isa<MDString>(MD))
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return None;
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return StrToExceptionBehavior(cast<MDString>(MD)->getString());
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}
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bool ConstrainedFPIntrinsic::isDefaultFPEnvironment() const {
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Optional<fp::ExceptionBehavior> Except = getExceptionBehavior();
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if (Except) {
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if (Except.getValue() != fp::ebIgnore)
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return false;
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}
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Optional<RoundingMode> Rounding = getRoundingMode();
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if (Rounding) {
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if (Rounding.getValue() != RoundingMode::NearestTiesToEven)
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return false;
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}
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return true;
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}
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FCmpInst::Predicate ConstrainedFPCmpIntrinsic::getPredicate() const {
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Metadata *MD = cast<MetadataAsValue>(getArgOperand(2))->getMetadata();
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if (!MD || !isa<MDString>(MD))
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return FCmpInst::BAD_FCMP_PREDICATE;
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return StringSwitch<FCmpInst::Predicate>(cast<MDString>(MD)->getString())
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.Case("oeq", FCmpInst::FCMP_OEQ)
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.Case("ogt", FCmpInst::FCMP_OGT)
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.Case("oge", FCmpInst::FCMP_OGE)
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.Case("olt", FCmpInst::FCMP_OLT)
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.Case("ole", FCmpInst::FCMP_OLE)
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.Case("one", FCmpInst::FCMP_ONE)
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.Case("ord", FCmpInst::FCMP_ORD)
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.Case("uno", FCmpInst::FCMP_UNO)
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.Case("ueq", FCmpInst::FCMP_UEQ)
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.Case("ugt", FCmpInst::FCMP_UGT)
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.Case("uge", FCmpInst::FCMP_UGE)
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.Case("ult", FCmpInst::FCMP_ULT)
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.Case("ule", FCmpInst::FCMP_ULE)
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.Case("une", FCmpInst::FCMP_UNE)
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.Default(FCmpInst::BAD_FCMP_PREDICATE);
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}
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bool ConstrainedFPIntrinsic::isUnaryOp() const {
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switch (getIntrinsicID()) {
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default:
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return false;
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#define INSTRUCTION(NAME, NARG, ROUND_MODE, INTRINSIC) \
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case Intrinsic::INTRINSIC: \
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return NARG == 1;
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#include "llvm/IR/ConstrainedOps.def"
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}
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}
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bool ConstrainedFPIntrinsic::isTernaryOp() const {
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switch (getIntrinsicID()) {
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default:
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return false;
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#define INSTRUCTION(NAME, NARG, ROUND_MODE, INTRINSIC) \
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case Intrinsic::INTRINSIC: \
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return NARG == 3;
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#include "llvm/IR/ConstrainedOps.def"
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}
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}
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bool ConstrainedFPIntrinsic::classof(const IntrinsicInst *I) {
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switch (I->getIntrinsicID()) {
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#define INSTRUCTION(NAME, NARGS, ROUND_MODE, INTRINSIC) \
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case Intrinsic::INTRINSIC:
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#include "llvm/IR/ConstrainedOps.def"
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return true;
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default:
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return false;
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}
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}
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ElementCount VPIntrinsic::getStaticVectorLength() const {
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auto GetVectorLengthOfType = [](const Type *T) -> ElementCount {
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auto VT = cast<VectorType>(T);
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auto ElemCount = VT->getElementCount();
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return ElemCount;
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};
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Value *VPMask = getMaskParam();
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assert(VPMask && "No mask param?");
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return GetVectorLengthOfType(VPMask->getType());
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}
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Value *VPIntrinsic::getMaskParam() const {
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if (auto MaskPos = getMaskParamPos(getIntrinsicID()))
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return getArgOperand(MaskPos.getValue());
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return nullptr;
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}
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void VPIntrinsic::setMaskParam(Value *NewMask) {
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auto MaskPos = getMaskParamPos(getIntrinsicID());
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setArgOperand(*MaskPos, NewMask);
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}
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Value *VPIntrinsic::getVectorLengthParam() const {
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if (auto EVLPos = getVectorLengthParamPos(getIntrinsicID()))
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return getArgOperand(EVLPos.getValue());
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return nullptr;
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}
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void VPIntrinsic::setVectorLengthParam(Value *NewEVL) {
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auto EVLPos = getVectorLengthParamPos(getIntrinsicID());
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setArgOperand(*EVLPos, NewEVL);
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}
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Optional<unsigned> VPIntrinsic::getMaskParamPos(Intrinsic::ID IntrinsicID) {
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switch (IntrinsicID) {
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default:
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return None;
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#define BEGIN_REGISTER_VP_INTRINSIC(VPID, MASKPOS, VLENPOS) \
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case Intrinsic::VPID: \
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return MASKPOS;
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#include "llvm/IR/VPIntrinsics.def"
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}
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}
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Optional<unsigned>
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VPIntrinsic::getVectorLengthParamPos(Intrinsic::ID IntrinsicID) {
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switch (IntrinsicID) {
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default:
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return None;
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#define BEGIN_REGISTER_VP_INTRINSIC(VPID, MASKPOS, VLENPOS) \
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case Intrinsic::VPID: \
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return VLENPOS;
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#include "llvm/IR/VPIntrinsics.def"
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}
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}
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bool VPIntrinsic::isVPIntrinsic(Intrinsic::ID ID) {
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switch (ID) {
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default:
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return false;
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#define BEGIN_REGISTER_VP_INTRINSIC(VPID, MASKPOS, VLENPOS) \
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case Intrinsic::VPID: \
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break;
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#include "llvm/IR/VPIntrinsics.def"
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}
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return true;
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}
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// Equivalent non-predicated opcode
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Optional<unsigned> VPIntrinsic::getFunctionalOpcodeForVP(Intrinsic::ID ID) {
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Optional<unsigned> FunctionalOC;
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switch (ID) {
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default:
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break;
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#define BEGIN_REGISTER_VP_INTRINSIC(VPID, ...) case Intrinsic::VPID:
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#define HANDLE_VP_TO_OPC(OPC) FunctionalOC = Instruction::OPC;
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#define END_REGISTER_VP_INTRINSIC(...) break;
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#include "llvm/IR/VPIntrinsics.def"
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}
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return FunctionalOC;
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}
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Intrinsic::ID VPIntrinsic::getForOpcode(unsigned IROPC) {
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switch (IROPC) {
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default:
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return Intrinsic::not_intrinsic;
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#define HANDLE_VP_TO_OPC(OPC) case Instruction::OPC:
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#define END_REGISTER_VP_INTRINSIC(VPID) return Intrinsic::VPID;
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#include "llvm/IR/VPIntrinsics.def"
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}
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}
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bool VPIntrinsic::canIgnoreVectorLengthParam() const {
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using namespace PatternMatch;
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ElementCount EC = getStaticVectorLength();
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// No vlen param - no lanes masked-off by it.
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auto *VLParam = getVectorLengthParam();
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if (!VLParam)
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return true;
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// Note that the VP intrinsic causes undefined behavior if the Explicit Vector
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// Length parameter is strictly greater-than the number of vector elements of
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// the operation. This function returns true when this is detected statically
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// in the IR.
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// Check whether "W == vscale * EC.getKnownMinValue()"
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if (EC.isScalable()) {
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// Undig the DL
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auto ParMod = this->getModule();
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if (!ParMod)
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return false;
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const auto &DL = ParMod->getDataLayout();
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// Compare vscale patterns
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uint64_t VScaleFactor;
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if (match(VLParam, m_c_Mul(m_ConstantInt(VScaleFactor), m_VScale(DL))))
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return VScaleFactor >= EC.getKnownMinValue();
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return (EC.getKnownMinValue() == 1) && match(VLParam, m_VScale(DL));
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}
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// standard SIMD operation
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auto VLConst = dyn_cast<ConstantInt>(VLParam);
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if (!VLConst)
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return false;
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uint64_t VLNum = VLConst->getZExtValue();
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if (VLNum >= EC.getKnownMinValue())
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return true;
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return false;
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}
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Function *VPIntrinsic::getDeclarationForParams(Module *M, Intrinsic::ID VPID,
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ArrayRef<Value *> Params) {
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assert(isVPIntrinsic(VPID) && "not a VP intrinsic");
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// TODO: Extend this for other VP intrinsics as they are upstreamed. This
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// works for binary arithmetic VP intrinsics.
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auto *VPFunc = Intrinsic::getDeclaration(M, VPID, Params[0]->getType());
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assert(VPFunc && "Could not declare VP intrinsic");
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return VPFunc;
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}
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Instruction::BinaryOps BinaryOpIntrinsic::getBinaryOp() const {
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switch (getIntrinsicID()) {
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case Intrinsic::uadd_with_overflow:
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case Intrinsic::sadd_with_overflow:
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case Intrinsic::uadd_sat:
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case Intrinsic::sadd_sat:
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return Instruction::Add;
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case Intrinsic::usub_with_overflow:
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case Intrinsic::ssub_with_overflow:
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case Intrinsic::usub_sat:
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case Intrinsic::ssub_sat:
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return Instruction::Sub;
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case Intrinsic::umul_with_overflow:
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case Intrinsic::smul_with_overflow:
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return Instruction::Mul;
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default:
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llvm_unreachable("Invalid intrinsic");
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}
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}
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bool BinaryOpIntrinsic::isSigned() const {
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switch (getIntrinsicID()) {
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case Intrinsic::sadd_with_overflow:
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case Intrinsic::ssub_with_overflow:
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case Intrinsic::smul_with_overflow:
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case Intrinsic::sadd_sat:
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case Intrinsic::ssub_sat:
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return true;
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default:
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return false;
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}
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}
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unsigned BinaryOpIntrinsic::getNoWrapKind() const {
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if (isSigned())
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return OverflowingBinaryOperator::NoSignedWrap;
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else
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return OverflowingBinaryOperator::NoUnsignedWrap;
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}
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const GCStatepointInst *GCProjectionInst::getStatepoint() const {
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const Value *Token = getArgOperand(0);
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// This takes care both of relocates for call statepoints and relocates
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// on normal path of invoke statepoint.
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if (!isa<LandingPadInst>(Token))
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return cast<GCStatepointInst>(Token);
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// This relocate is on exceptional path of an invoke statepoint
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const BasicBlock *InvokeBB =
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cast<Instruction>(Token)->getParent()->getUniquePredecessor();
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assert(InvokeBB && "safepoints should have unique landingpads");
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|
assert(InvokeBB->getTerminator() &&
|
|
"safepoint block should be well formed");
|
|
|
|
return cast<GCStatepointInst>(InvokeBB->getTerminator());
|
|
}
|
|
|
|
Value *GCRelocateInst::getBasePtr() const {
|
|
if (auto Opt = getStatepoint()->getOperandBundle(LLVMContext::OB_gc_live))
|
|
return *(Opt->Inputs.begin() + getBasePtrIndex());
|
|
return *(getStatepoint()->arg_begin() + getBasePtrIndex());
|
|
}
|
|
|
|
Value *GCRelocateInst::getDerivedPtr() const {
|
|
if (auto Opt = getStatepoint()->getOperandBundle(LLVMContext::OB_gc_live))
|
|
return *(Opt->Inputs.begin() + getDerivedPtrIndex());
|
|
return *(getStatepoint()->arg_begin() + getDerivedPtrIndex());
|
|
}
|