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https://github.com/c64scene-ar/llvm-6502.git
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86953b5795
a dynamic analysis done on each call to the routine. However, now it can use the standard pass infrastructure to reference other analyses, instead of a silly setter method. This will become more interesting as I teach it about more analysis passes. This updates the two inliner passes to use the inline cost analysis. Doing so highlights how utterly redundant these two passes are. Either we should find a cheaper way to do always inlining, or we should merge the two and just fiddle with the thresholds to get the desired behavior. I'm leaning increasingly toward the latter as it would also remove the Inliner sub-class split. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173030 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.6 KiB
C++
84 lines
2.6 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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#define DEBUG_TYPE "inline"
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#include "llvm/Transforms/IPO.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/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/Support/CallSite.h"
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#include "llvm/Transforms/IPO/InlinerPass.h"
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using namespace llvm;
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namespace {
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/// \brief Actaul 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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InlineCostAnalysis *ICA;
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public:
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SimpleInliner() : Inliner(ID), ICA(0) {
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initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
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}
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SimpleInliner(int Threshold)
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: Inliner(ID, Threshold, /*InsertLifetime*/ true), ICA(0) {
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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) {
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return ICA->getInlineCost(CS, getInlineThreshold(CS));
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}
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virtual bool runOnSCC(CallGraphSCC &SCC);
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virtual void getAnalysisUsage(AnalysisUsage &AU) const;
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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_AG_DEPENDENCY(CallGraph)
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INITIALIZE_PASS_DEPENDENCY(InlineCostAnalysis)
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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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bool SimpleInliner::runOnSCC(CallGraphSCC &SCC) {
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ICA = &getAnalysis<InlineCostAnalysis>();
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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<InlineCostAnalysis>();
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Inliner::getAnalysisUsage(AU);
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}
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