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//===-- AMDGPUAlwaysInlinePass.cpp - Promote Allocas ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \file
/// This pass marks all internal functions as always_inline and creates
/// duplicates of all other functions a marks the duplicates as always_inline.
//
//===----------------------------------------------------------------------===//
#include "AMDGPU.h"
#include "llvm/IR/Module.h"
#include "llvm/Transforms/Utils/Cloning.h"
using namespace llvm;
namespace {
class AMDGPUAlwaysInline : public ModulePass {
static char ID;
public:
AMDGPUAlwaysInline() : ModulePass(ID) { }
bool runOnModule(Module &M) override;
const char *getPassName() const override { return "AMDGPU Always Inline Pass"; }
};
} // End anonymous namespace
char AMDGPUAlwaysInline::ID = 0;
bool AMDGPUAlwaysInline::runOnModule(Module &M) {
std::vector<Function*> FuncsToClone;
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
Function &F = *I;
if (!F.hasLocalLinkage() && !F.isDeclaration() && !F.use_empty())
FuncsToClone.push_back(&F);
}
for (Function *F : FuncsToClone) {
ValueToValueMapTy VMap;
Function *NewFunc = CloneFunction(F, VMap, false);
NewFunc->setLinkage(GlobalValue::InternalLinkage);
F->getParent()->getFunctionList().push_back(NewFunc);
F->replaceAllUsesWith(NewFunc);
}
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
Function &F = *I;
if (F.hasLocalLinkage()) {
F.addFnAttr(Attribute::AlwaysInline);
}
}
return false;
}
ModulePass *llvm::createAMDGPUAlwaysInlinePass() {
return new AMDGPUAlwaysInline();
}
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