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125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
//===- InlineSimple.cpp - Code to perform simple function inlining --------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/InlineCost.h"
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#include "llvm/Analysis/ProfileSummaryInfo.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/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/Inliner.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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/// 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 LegacyInlinerBase {
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InlineParams Params;
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public:
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SimpleInliner() : LegacyInlinerBase(ID), Params(llvm::getInlineParams()) {
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initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
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}
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explicit SimpleInliner(InlineParams Params)
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: LegacyInlinerBase(ID), Params(std::move(Params)) {
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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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bool RemarksEnabled = false;
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const auto &BBs = CS.getCaller()->getBasicBlockList();
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if (!BBs.empty()) {
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auto DI = OptimizationRemark(DEBUG_TYPE, "", DebugLoc(), &BBs.front());
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if (DI.isEnabled())
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RemarksEnabled = true;
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}
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OptimizationRemarkEmitter ORE(CS.getCaller());
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std::function<AssumptionCache &(Function &)> GetAssumptionCache =
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[&](Function &F) -> AssumptionCache & {
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return ACT->getAssumptionCache(F);
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};
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return llvm::getInlineCost(CS, Params, TTI, GetAssumptionCache,
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/*GetBFI=*/None, PSI,
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RemarksEnabled ? &ORE : 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", "Function Integration/Inlining",
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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(ProfileSummaryInfoWrapperPass)
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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", "Function Integration/Inlining",
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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(llvm::getInlineParams(Threshold));
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}
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Pass *llvm::createFunctionInliningPass(unsigned OptLevel,
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unsigned SizeOptLevel,
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bool DisableInlineHotCallSite) {
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auto Param = llvm::getInlineParams(OptLevel, SizeOptLevel);
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if (DisableInlineHotCallSite)
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Param.HotCallSiteThreshold = 0;
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return new SimpleInliner(Param);
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}
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Pass *llvm::createFunctionInliningPass(InlineParams &Params) {
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return new SimpleInliner(Params);
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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 LegacyInlinerBase::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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LegacyInlinerBase::getAnalysisUsage(AU);
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}
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