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//===- OptimizationDiagnosticInfo.cpp - Optimization Diagnostic -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Optimization diagnostic interfaces. It's packaged as an analysis pass so
// that by using this service passes become dependent on BFI as well. BFI is
// used to compute the "hotness" of the diagnostic message.
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/OptimizationDiagnosticInfo.h"
#include "llvm/Analysis/LazyBlockFrequencyInfo.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/LLVMContext.h"
using namespace llvm;
OptimizationRemarkEmitter::OptimizationRemarkEmitter() : FunctionPass(ID) {
initializeOptimizationRemarkEmitterPass(*PassRegistry::getPassRegistry());
}
Optional<uint64_t> OptimizationRemarkEmitter::computeHotness(Value *V) {
if (!BFI)
return None;
return BFI->getBlockProfileCount(cast<BasicBlock>(V));
}
void OptimizationRemarkEmitter::emitOptimizationRemarkMissed(
const char *PassName, const DebugLoc &DLoc, Value *V, const Twine &Msg) {
LLVMContext &Ctx = F->getContext();
Ctx.diagnose(DiagnosticInfoOptimizationRemarkMissed(PassName, *F, DLoc, Msg,
computeHotness(V)));
}
void OptimizationRemarkEmitter::emitOptimizationRemarkMissed(
const char *PassName, Loop *L, const Twine &Msg) {
emitOptimizationRemarkMissed(PassName, L->getStartLoc(), L->getHeader(), Msg);
}
bool OptimizationRemarkEmitter::runOnFunction(Function &Fn) {
F = &Fn;
if (Fn.getContext().getDiagnosticHotnessRequested())
BFI = &getAnalysis<LazyBlockFrequencyInfoPass>().getBFI();
else
BFI = nullptr;
return false;
}
void OptimizationRemarkEmitter::getAnalysisUsage(AnalysisUsage &AU) const {
LazyBlockFrequencyInfoPass::getLazyBFIAnalysisUsage(AU);
AU.setPreservesAll();
}
char OptimizationRemarkEmitter::ID = 0;
static const char ore_name[] = "Optimization Remark Emitter";
#define ORE_NAME "opt-remark-emitter"
INITIALIZE_PASS_BEGIN(OptimizationRemarkEmitter, ORE_NAME, ore_name, false,
true)
INITIALIZE_PASS_DEPENDENCY(LazyBFIPass)
INITIALIZE_PASS_END(OptimizationRemarkEmitter, ORE_NAME, ore_name, false, true)
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