1//===- InlineSimple.cpp - Code to perform simple function inlining --------===// 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// This file implements bottom-up inlining of functions into callees. 11// 12//===----------------------------------------------------------------------===// 13 14#define DEBUG_TYPE "inline" 15#include "llvm/CallingConv.h" 16#include "llvm/Instructions.h" 17#include "llvm/IntrinsicInst.h" 18#include "llvm/Module.h" 19#include "llvm/Type.h" 20#include "llvm/Analysis/CallGraph.h" 21#include "llvm/Analysis/InlineCost.h" 22#include "llvm/Support/CallSite.h" 23#include "llvm/Transforms/IPO.h" 24#include "llvm/Transforms/IPO/InlinerPass.h" 25#include "llvm/Target/TargetData.h" 26 27using namespace llvm; 28 29namespace { 30 31 class SimpleInliner : public Inliner { 32 InlineCostAnalyzer CA; 33 public: 34 SimpleInliner() : Inliner(ID) { 35 initializeSimpleInlinerPass(*PassRegistry::getPassRegistry()); 36 } 37 SimpleInliner(int Threshold) : Inliner(ID, Threshold, 38 /*InsertLifetime*/true) { 39 initializeSimpleInlinerPass(*PassRegistry::getPassRegistry()); 40 } 41 static char ID; // Pass identification, replacement for typeid 42 InlineCost getInlineCost(CallSite CS) { 43 return CA.getInlineCost(CS, getInlineThreshold(CS)); 44 } 45 virtual bool doInitialization(CallGraph &CG); 46 }; 47} 48 49char SimpleInliner::ID = 0; 50INITIALIZE_PASS_BEGIN(SimpleInliner, "inline", 51 "Function Integration/Inlining", false, false) 52INITIALIZE_AG_DEPENDENCY(CallGraph) 53INITIALIZE_PASS_END(SimpleInliner, "inline", 54 "Function Integration/Inlining", false, false) 55 56Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); } 57 58Pass *llvm::createFunctionInliningPass(int Threshold) { 59 return new SimpleInliner(Threshold); 60} 61 62// doInitialization - Initializes the vector of functions that have been 63// annotated with the noinline attribute. 64bool SimpleInliner::doInitialization(CallGraph &CG) { 65 CA.setTargetData(getAnalysisIfAvailable<TargetData>()); 66 return false; 67} 68 69