131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
//===------ DumpFunctionPass.cpp --------------------------------*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Write a function to a file.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "polly/Support/DumpFunctionPass.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/ToolOutputFile.h"
|
|
#include "llvm/Transforms/IPO/GlobalDCE.h"
|
|
#include "llvm/Transforms/IPO/StripDeadPrototypes.h"
|
|
#include "llvm/Transforms/Utils/Cloning.h"
|
|
|
|
#define DEBUG_TYPE "polly-dump-func"
|
|
|
|
using namespace llvm;
|
|
using namespace polly;
|
|
|
|
namespace {
|
|
|
|
static void runDumpFunction(llvm::Function &F, StringRef Suffix) {
|
|
StringRef FName = F.getName();
|
|
Module *M = F.getParent();
|
|
|
|
StringRef ModuleName = M->getName();
|
|
StringRef Stem = sys::path::stem(ModuleName);
|
|
std::string Dumpfile = (Twine(Stem) + "-" + FName + Suffix + ".ll").str();
|
|
LLVM_DEBUG(dbgs() << "Dumping function '" << FName << "' to '" << Dumpfile
|
|
<< "'...\n");
|
|
|
|
ValueToValueMapTy VMap;
|
|
auto ShouldCloneDefinition = [&F](const GlobalValue *GV) -> bool {
|
|
return GV == &F;
|
|
};
|
|
std::unique_ptr<Module> CM = CloneModule(*M, VMap, ShouldCloneDefinition);
|
|
Function *NewF = cast<Function>(VMap.lookup(&F));
|
|
assert(NewF && "Expected selected function to be cloned");
|
|
|
|
LLVM_DEBUG(dbgs() << "Global DCE...\n");
|
|
|
|
// Stop F itself from being pruned
|
|
GlobalValue::LinkageTypes OrigLinkage = NewF->getLinkage();
|
|
NewF->setLinkage(GlobalValue::ExternalLinkage);
|
|
|
|
{
|
|
ModuleAnalysisManager MAM;
|
|
ModulePassManager MPM;
|
|
|
|
PassInstrumentationCallbacks PIC;
|
|
MAM.registerPass([&] { return PassInstrumentationAnalysis(&PIC); });
|
|
|
|
MPM.addPass(GlobalDCEPass());
|
|
MPM.addPass(StripDeadPrototypesPass());
|
|
MPM.run(*CM, MAM);
|
|
}
|
|
|
|
// Restore old linkage
|
|
NewF->setLinkage(OrigLinkage);
|
|
|
|
LLVM_DEBUG(dbgs() << "Write to file '" << Dumpfile << "'...\n");
|
|
|
|
std::unique_ptr<ToolOutputFile> Out;
|
|
std::error_code EC;
|
|
Out.reset(new ToolOutputFile(Dumpfile, EC, sys::fs::OF_None));
|
|
if (EC) {
|
|
errs() << EC.message() << '\n';
|
|
return;
|
|
}
|
|
|
|
CM->print(Out->os(), nullptr);
|
|
Out->keep();
|
|
LLVM_DEBUG(dbgs() << "Dump file " << Dumpfile << " written successfully\n");
|
|
}
|
|
|
|
class DumpFunctionWrapperPass final : public FunctionPass {
|
|
private:
|
|
DumpFunctionWrapperPass(const DumpFunctionWrapperPass &) = delete;
|
|
const DumpFunctionWrapperPass &
|
|
operator=(const DumpFunctionWrapperPass &) = delete;
|
|
|
|
std::string Suffix;
|
|
|
|
public:
|
|
static char ID;
|
|
|
|
explicit DumpFunctionWrapperPass() : FunctionPass(ID), Suffix("-dump") {}
|
|
|
|
explicit DumpFunctionWrapperPass(std::string Suffix)
|
|
: FunctionPass(ID), Suffix(std::move(Suffix)) {}
|
|
|
|
/// @name FunctionPass interface
|
|
//@{
|
|
virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override {
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
virtual bool runOnFunction(llvm::Function &F) override {
|
|
runDumpFunction(F, Suffix);
|
|
return false;
|
|
}
|
|
//@}
|
|
};
|
|
|
|
char DumpFunctionWrapperPass::ID;
|
|
} // namespace
|
|
|
|
FunctionPass *polly::createDumpFunctionWrapperPass(std::string Suffix) {
|
|
return new DumpFunctionWrapperPass(std::move(Suffix));
|
|
}
|
|
|
|
llvm::PreservedAnalyses DumpFunctionPass::run(Function &F,
|
|
FunctionAnalysisManager &AM) {
|
|
runDumpFunction(F, Suffix);
|
|
return PreservedAnalyses::all();
|
|
}
|
|
|
|
INITIALIZE_PASS_BEGIN(DumpFunctionWrapperPass, "polly-dump-function",
|
|
"Polly - Dump Function", false, false)
|
|
INITIALIZE_PASS_END(DumpFunctionWrapperPass, "polly-dump-function",
|
|
"Polly - Dump Function", false, false)
|