contrib/llvm/lib/Transforms/IPO/InlineSimple.cpp

   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 #include "llvm/Analysis/AssumptionCache.h"
  15 #include "llvm/Analysis/CallGraph.h"
  16 #include "llvm/Analysis/InlineCost.h"
  17 #include "llvm/Analysis/ProfileSummaryInfo.h"
  18 #include "llvm/Analysis/TargetLibraryInfo.h"
  19 #include "llvm/Analysis/TargetTransformInfo.h"
  20 #include "llvm/IR/CallSite.h"
  21 #include "llvm/IR/CallingConv.h"
  22 #include "llvm/IR/DataLayout.h"
  23 #include "llvm/IR/Instructions.h"
  24 #include "llvm/IR/IntrinsicInst.h"
  25 #include "llvm/IR/Module.h"
  26 #include "llvm/IR/Type.h"
  27 #include "llvm/Transforms/IPO.h"
  28 #include "llvm/Transforms/IPO/Inliner.h"
  29
  30 using namespace llvm;
  31
  32 #define DEBUG_TYPE "inline"
  33
  34 namespace {
  35
  36 /// \brief Actual inliner pass implementation.
  37 ///
  38 /// The common implementation of the inlining logic is shared between this
  39 /// inliner pass and the always inliner pass. The two passes use different cost
  40 /// analyses to determine when to inline.
  41 class SimpleInliner : public LegacyInlinerBase {
  42
  43   InlineParams Params;
  44
  45 public:
  46   SimpleInliner() : LegacyInlinerBase(ID), Params(llvm::getInlineParams()) {
  47     initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
  48   }
  49
  50   explicit SimpleInliner(InlineParams Params)
  51       : LegacyInlinerBase(ID), Params(Params) {
  52     initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
  53   }
  54
  55   static char ID; // Pass identification, replacement for typeid
  56
  57   InlineCost getInlineCost(CallSite CS) override {
  58     Function *Callee = CS.getCalledFunction();
  59     TargetTransformInfo &TTI = TTIWP->getTTI(*Callee);
  60     std::function<AssumptionCache &(Function &)> GetAssumptionCache =
  61         [&](Function &F) -> AssumptionCache & {
  62       return ACT->getAssumptionCache(F);
  63     };
  64     return llvm::getInlineCost(CS, Params, TTI, GetAssumptionCache, PSI);
  65   }
  66
  67   bool runOnSCC(CallGraphSCC &SCC) override;
  68   void getAnalysisUsage(AnalysisUsage &AU) const override;
  69
  70 private:
  71   TargetTransformInfoWrapperPass *TTIWP;
  72
  73 };
  74
  75 } // end anonymous namespace
  76
  77 char SimpleInliner::ID = 0;
  78 INITIALIZE_PASS_BEGIN(SimpleInliner, "inline", "Function Integration/Inlining",
  79                       false, false)
  80 INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
  81 INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
  82 INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass)
  83 INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
  84 INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
  85 INITIALIZE_PASS_END(SimpleInliner, "inline", "Function Integration/Inlining",
  86                     false, false)
  87
  88 Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); }
  89
  90 Pass *llvm::createFunctionInliningPass(int Threshold) {
  91   return new SimpleInliner(llvm::getInlineParams(Threshold));
  92 }
  93
  94 Pass *llvm::createFunctionInliningPass(unsigned OptLevel,
  95                                        unsigned SizeOptLevel) {
  96   return new SimpleInliner(llvm::getInlineParams(OptLevel, SizeOptLevel));
  97 }
  98
  99 Pass *llvm::createFunctionInliningPass(InlineParams &Params) {
 100   return new SimpleInliner(Params);
 101 }
 102
 103 bool SimpleInliner::runOnSCC(CallGraphSCC &SCC) {
 104   TTIWP = &getAnalysis<TargetTransformInfoWrapperPass>();
 105   return LegacyInlinerBase::runOnSCC(SCC);
 106 }
 107
 108 void SimpleInliner::getAnalysisUsage(AnalysisUsage &AU) const {
 109   AU.addRequired<TargetTransformInfoWrapperPass>();
 110   LegacyInlinerBase::getAnalysisUsage(AU);
 111 }