1 //===-- AMDGPUAlwaysInlinePass.cpp - Promote Allocas ----------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 /// \file 11 /// This pass marks all internal functions as always_inline and creates 12 /// duplicates of all other functions a marks the duplicates as always_inline. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "AMDGPU.h" 17 #include "llvm/IR/Module.h" 18 #include "llvm/Transforms/Utils/Cloning.h" 19 20 using namespace llvm; 21 22 namespace { 23 24 class AMDGPUAlwaysInline : public ModulePass { 25 26 static char ID; 27 28 public: 29 AMDGPUAlwaysInline() : ModulePass(ID) { } 30 bool runOnModule(Module &M) override; 31 const char *getPassName() const override { return "AMDGPU Always Inline Pass"; } 32 }; 33 34 } // End anonymous namespace 35 36 char AMDGPUAlwaysInline::ID = 0; 37 38 bool AMDGPUAlwaysInline::runOnModule(Module &M) { 39 40 std::vector<Function*> FuncsToClone; 41 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) { 42 Function &F = *I; 43 if (!F.hasLocalLinkage() && !F.isDeclaration() && !F.use_empty()) 44 FuncsToClone.push_back(&F); 45 } 46 47 for (Function *F : FuncsToClone) { 48 ValueToValueMapTy VMap; 49 Function *NewFunc = CloneFunction(F, VMap, false); 50 NewFunc->setLinkage(GlobalValue::InternalLinkage); 51 F->getParent()->getFunctionList().push_back(NewFunc); 52 F->replaceAllUsesWith(NewFunc); 53 } 54 55 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) { 56 Function &F = *I; 57 if (F.hasLocalLinkage()) { 58 F.addFnAttr(Attribute::AlwaysInline); 59 } 60 } 61 return false; 62 } 63 64 ModulePass *llvm::createAMDGPUAlwaysInlinePass() { 65 return new AMDGPUAlwaysInline(); 66 } 67
