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 27 using namespace llvm; 28 29 namespace { 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 49 char SimpleInliner::ID = 0; 50 INITIALIZE_PASS_BEGIN(SimpleInliner, "inline", 51 "Function Integration/Inlining", false, false) 52 INITIALIZE_AG_DEPENDENCY(CallGraph) 53 INITIALIZE_PASS_END(SimpleInliner, "inline", 54 "Function Integration/Inlining", false, false) 55 56 Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); } 57 58 Pass *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. 64 bool SimpleInliner::doInitialization(CallGraph &CG) { 65 CA.setTargetData(getAnalysisIfAvailable<TargetData>()); 66 return false; 67 } 68 69
