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//===-- AnnotationRemarks.cpp - Generate remarks for annotated instrs. ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Generate remarks for instructions marked with !annotation.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar/AnnotationRemarks.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Transforms/Scalar.h"
using namespace llvm;
using namespace llvm::ore;
#define DEBUG_TYPE "annotation-remarks"
#define REMARK_PASS DEBUG_TYPE
static void runImpl(Function &F) {
if (!OptimizationRemarkEmitter::allowExtraAnalysis(F, REMARK_PASS))
return;
OptimizationRemarkEmitter ORE(&F);
// For now, just generate a summary of the annotated instructions.
MapVector<StringRef, unsigned> Mapping;
for (Instruction &I : instructions(F)) {
if (!I.hasMetadata(LLVMContext::MD_annotation))
continue;
for (const MDOperand &Op :
I.getMetadata(LLVMContext::MD_annotation)->operands()) {
auto Iter = Mapping.insert({cast<MDString>(Op.get())->getString(), 0});
Iter.first->second++;
}
}
Instruction *IP = &*F.begin()->begin();
for (const auto &KV : Mapping)
ORE.emit(OptimizationRemarkAnalysis(REMARK_PASS, "AnnotationSummary", IP)
<< "Annotated " << NV("count", KV.second) << " instructions with "
<< NV("type", KV.first));
}
namespace {
struct AnnotationRemarksLegacy : public FunctionPass {
static char ID;
AnnotationRemarksLegacy() : FunctionPass(ID) {
initializeAnnotationRemarksLegacyPass(*PassRegistry::getPassRegistry());
}
bool runOnFunction(Function &F) override {
runImpl(F);
return false;
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
}
};
} // end anonymous namespace
char AnnotationRemarksLegacy::ID = 0;
INITIALIZE_PASS_BEGIN(AnnotationRemarksLegacy, "annotation-remarks",
"Annotation Remarks", false, false)
INITIALIZE_PASS_END(AnnotationRemarksLegacy, "annotation-remarks",
"Annotation Remarks", false, false)
FunctionPass *llvm::createAnnotationRemarksLegacyPass() {
return new AnnotationRemarksLegacy();
}
PreservedAnalyses AnnotationRemarksPass::run(Function &F,
FunctionAnalysisManager &AM) {
runImpl(F);
return PreservedAnalyses::all();
}
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