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b76d92e4ad
This patch provides the following infrastructure for PGO enhancements in inliner: Enable the use of block level profile information in inliner Incremental update of block frequency information during inlining Update the function entry counts of callees when they get inlined into callers. Differential Revision: http://reviews.llvm.org/D16381 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262636 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
//===- InlineSimple.cpp - Code to perform simple function inlining --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements bottom-up inlining of functions into callees.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/AssumptionCache.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Analysis/InlineCost.h"
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#include "llvm/Analysis/TargetLibraryInfo.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/IR/CallSite.h"
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#include "llvm/IR/CallingConv.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Transforms/IPO/InlinerPass.h"
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using namespace llvm;
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#define DEBUG_TYPE "inline"
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namespace {
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/// \brief Actual inliner pass implementation.
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///
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/// The common implementation of the inlining logic is shared between this
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/// inliner pass and the always inliner pass. The two passes use different cost
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/// analyses to determine when to inline.
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class SimpleInliner : public Inliner {
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// This field is populated based on one of the following:
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// optimization or size optimization levels,
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// --inline-threshold flag,
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// user specified value.
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int DefaultThreshold;
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public:
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SimpleInliner()
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: Inliner(ID), DefaultThreshold(llvm::getDefaultInlineThreshold()) {
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initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
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}
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SimpleInliner(int Threshold) : Inliner(ID), DefaultThreshold(Threshold) {
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initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
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}
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static char ID; // Pass identification, replacement for typeid
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InlineCost getInlineCost(CallSite CS) override {
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Function *Callee = CS.getCalledFunction();
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TargetTransformInfo &TTI = TTIWP->getTTI(*Callee);
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return llvm::getInlineCost(CS, DefaultThreshold, TTI, ACT,
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HasProfileData ? BFA.get() : nullptr);
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}
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bool runOnSCC(CallGraphSCC &SCC) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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private:
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TargetTransformInfoWrapperPass *TTIWP;
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};
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} // end anonymous namespace
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char SimpleInliner::ID = 0;
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INITIALIZE_PASS_BEGIN(SimpleInliner, "inline",
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"Function Integration/Inlining", false, false)
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INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
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INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
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INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
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INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
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INITIALIZE_PASS_END(SimpleInliner, "inline",
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"Function Integration/Inlining", false, false)
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Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); }
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Pass *llvm::createFunctionInliningPass(int Threshold) {
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return new SimpleInliner(Threshold);
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}
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Pass *llvm::createFunctionInliningPass(unsigned OptLevel,
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unsigned SizeOptLevel) {
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return new SimpleInliner(
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llvm::computeThresholdFromOptLevels(OptLevel, SizeOptLevel));
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}
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bool SimpleInliner::runOnSCC(CallGraphSCC &SCC) {
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TTIWP = &getAnalysis<TargetTransformInfoWrapperPass>();
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return Inliner::runOnSCC(SCC);
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}
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void SimpleInliner::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<TargetTransformInfoWrapperPass>();
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Inliner::getAnalysisUsage(AU);
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}
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