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https://github.com/RPCS3/llvm-mirror.git
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359f23868e
Summary: This just uses the latency benchmark runner on the parallel uops snippet generator. Fixes PR37698. Reviewers: gchatelet Subscribers: tschuett, RKSimon, llvm-commits Differential Revision: https://reviews.llvm.org/D57000 llvm-svn: 352632
149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
//===-- Target.cpp ----------------------------------------------*- C++ -*-===//
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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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#include "Target.h"
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#include "Latency.h"
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#include "Uops.h"
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namespace llvm {
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namespace exegesis {
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ExegesisTarget::~ExegesisTarget() {} // anchor.
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static ExegesisTarget *FirstTarget = nullptr;
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const ExegesisTarget *ExegesisTarget::lookup(llvm::Triple TT) {
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for (const ExegesisTarget *T = FirstTarget; T != nullptr; T = T->Next) {
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if (T->matchesArch(TT.getArch()))
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return T;
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}
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return nullptr;
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}
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void ExegesisTarget::registerTarget(ExegesisTarget *Target) {
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if (FirstTarget == nullptr) {
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FirstTarget = Target;
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return;
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}
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if (Target->Next != nullptr)
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return; // Already registered.
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Target->Next = FirstTarget;
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FirstTarget = Target;
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}
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std::unique_ptr<SnippetGenerator>
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ExegesisTarget::createSnippetGenerator(InstructionBenchmark::ModeE Mode,
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const LLVMState &State) const {
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switch (Mode) {
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case InstructionBenchmark::Unknown:
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return nullptr;
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case InstructionBenchmark::Latency:
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return createLatencySnippetGenerator(State);
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case InstructionBenchmark::Uops:
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case InstructionBenchmark::InverseThroughput:
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return createUopsSnippetGenerator(State);
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}
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return nullptr;
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}
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std::unique_ptr<BenchmarkRunner>
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ExegesisTarget::createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
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const LLVMState &State) const {
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switch (Mode) {
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case InstructionBenchmark::Unknown:
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return nullptr;
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case InstructionBenchmark::Latency:
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case InstructionBenchmark::InverseThroughput:
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return createLatencyBenchmarkRunner(State, Mode);
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case InstructionBenchmark::Uops:
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return createUopsBenchmarkRunner(State);
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}
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return nullptr;
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}
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std::unique_ptr<SnippetGenerator>
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ExegesisTarget::createLatencySnippetGenerator(const LLVMState &State) const {
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return llvm::make_unique<LatencySnippetGenerator>(State);
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}
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std::unique_ptr<SnippetGenerator>
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ExegesisTarget::createUopsSnippetGenerator(const LLVMState &State) const {
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return llvm::make_unique<UopsSnippetGenerator>(State);
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}
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std::unique_ptr<BenchmarkRunner> ExegesisTarget::createLatencyBenchmarkRunner(
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const LLVMState &State, InstructionBenchmark::ModeE Mode) const {
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return llvm::make_unique<LatencyBenchmarkRunner>(State, Mode);
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}
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std::unique_ptr<BenchmarkRunner>
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ExegesisTarget::createUopsBenchmarkRunner(const LLVMState &State) const {
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return llvm::make_unique<UopsBenchmarkRunner>(State);
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}
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static_assert(std::is_pod<PfmCountersInfo>::value,
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"We shouldn't have dynamic initialization here");
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const PfmCountersInfo PfmCountersInfo::Default = {nullptr, nullptr, nullptr,
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0u};
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const PfmCountersInfo &
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ExegesisTarget::getPfmCounters(llvm::StringRef CpuName) const {
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assert(std::is_sorted(
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CpuPfmCounters.begin(), CpuPfmCounters.end(),
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[](const CpuAndPfmCounters &LHS, const CpuAndPfmCounters &RHS) {
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return strcmp(LHS.CpuName, RHS.CpuName) < 0;
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}) &&
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"CpuPfmCounters table is not sorted");
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// Find entry
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auto Found =
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std::lower_bound(CpuPfmCounters.begin(), CpuPfmCounters.end(), CpuName);
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if (Found == CpuPfmCounters.end() ||
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llvm::StringRef(Found->CpuName) != CpuName) {
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// Use the default.
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if (CpuPfmCounters.begin() != CpuPfmCounters.end() &&
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CpuPfmCounters.begin()->CpuName[0] == '\0') {
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Found = CpuPfmCounters.begin(); // The target specifies a default.
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} else {
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return PfmCountersInfo::Default; // No default for the target.
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}
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}
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assert(Found->PCI && "Missing counters");
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return *Found->PCI;
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}
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namespace {
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// Default implementation.
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class ExegesisDefaultTarget : public ExegesisTarget {
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public:
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ExegesisDefaultTarget() : ExegesisTarget({}) {}
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private:
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std::vector<llvm::MCInst> setRegTo(const llvm::MCSubtargetInfo &STI,
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unsigned Reg,
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const llvm::APInt &Value) const override {
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llvm_unreachable("Not yet implemented");
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}
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bool matchesArch(llvm::Triple::ArchType Arch) const override {
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llvm_unreachable("never called");
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return false;
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}
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};
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} // namespace
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const ExegesisTarget &ExegesisTarget::getDefault() {
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static ExegesisDefaultTarget Target;
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return Target;
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}
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} // namespace exegesis
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} // namespace llvm
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