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337f461009
And use it in MachineOptimizationRemarkEmitter. A test will follow on top of Justin's changes to enable MachineORE in AsmPrinter. The approach is similar to the IR-level pass. It's a bit simpler because BPI is immutable at the Machine level so we don't need to make that lazy. Because of this, a new function mapping is introduced (BPIPassTrait::getBPI). This function extracts BPI from the pass. In case of the lazy pass, this is when the calculation of the BFI occurs. For Machine-level, this is the identity function. Differential Revision: https://reviews.llvm.org/D29836 llvm-svn: 295072
91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
///===- MachineOptimizationRemarkEmitter.cpp - Opt Diagnostic -*- C++ -*---===//
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///
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/// The LLVM Compiler Infrastructure
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///
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/// This file is distributed under the University of Illinois Open Source
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/// License. See LICENSE.TXT for details.
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///
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///===---------------------------------------------------------------------===//
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/// \file
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/// Optimization diagnostic interfaces for machine passes. It's packaged as an
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/// analysis pass so that by using this service passes become dependent on MBFI
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/// as well. MBFI is used to compute the "hotness" of the diagnostic message.
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///
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///===---------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
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#include "llvm/CodeGen/LazyMachineBlockFrequencyInfo.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/DiagnosticInfo.h"
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#include "llvm/IR/LLVMContext.h"
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using namespace llvm;
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Optional<uint64_t>
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MachineOptimizationRemarkEmitter::computeHotness(const MachineBasicBlock &MBB) {
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if (!MBFI)
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return None;
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return MBFI->getBlockProfileCount(&MBB);
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}
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void MachineOptimizationRemarkEmitter::computeHotness(
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DiagnosticInfoMIROptimization &Remark) {
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const MachineBasicBlock *MBB = Remark.getBlock();
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if (MBB)
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Remark.setHotness(computeHotness(*MBB));
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}
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void MachineOptimizationRemarkEmitter::emit(
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DiagnosticInfoOptimizationBase &OptDiagCommon) {
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auto &OptDiag = cast<DiagnosticInfoMIROptimization>(OptDiagCommon);
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computeHotness(OptDiag);
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LLVMContext &Ctx = MF.getFunction()->getContext();
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yaml::Output *Out = Ctx.getDiagnosticsOutputFile();
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if (Out) {
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auto *P = &const_cast<DiagnosticInfoOptimizationBase &>(OptDiagCommon);
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*Out << P;
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}
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// FIXME: now that IsVerbose is part of DI, filtering for this will be moved
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// from here to clang.
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if (!OptDiag.isVerbose() || shouldEmitVerbose())
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Ctx.diagnose(OptDiag);
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}
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MachineOptimizationRemarkEmitterPass::MachineOptimizationRemarkEmitterPass()
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: MachineFunctionPass(ID) {
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initializeMachineOptimizationRemarkEmitterPassPass(
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*PassRegistry::getPassRegistry());
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}
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bool MachineOptimizationRemarkEmitterPass::runOnMachineFunction(
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MachineFunction &MF) {
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MachineBlockFrequencyInfo *MBFI;
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if (MF.getFunction()->getContext().getDiagnosticHotnessRequested())
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MBFI = &getAnalysis<LazyMachineBlockFrequencyInfoPass>().getBFI();
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else
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MBFI = nullptr;
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ORE = llvm::make_unique<MachineOptimizationRemarkEmitter>(MF, MBFI);
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return false;
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}
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void MachineOptimizationRemarkEmitterPass::getAnalysisUsage(
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AnalysisUsage &AU) const {
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LazyMachineBlockFrequencyInfoPass::getLazyMachineBFIAnalysisUsage(AU);
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AU.setPreservesAll();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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char MachineOptimizationRemarkEmitterPass::ID = 0;
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static const char ore_name[] = "Machine Optimization Remark Emitter";
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#define ORE_NAME "machine-opt-remark-emitter"
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INITIALIZE_PASS_BEGIN(MachineOptimizationRemarkEmitterPass, ORE_NAME, ore_name,
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false, true)
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INITIALIZE_PASS_DEPENDENCY(LazyMachineBFIPass)
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INITIALIZE_PASS_END(MachineOptimizationRemarkEmitterPass, ORE_NAME, ore_name,
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false, true)
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