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shouldn't do AU.setPreservesCFG(), because even though CodeGen passes don't modify the LLVM IR CFG, they may modify the MachineFunction CFG, and passes like MachineLoop are registered with isCFGOnly set to true. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77691 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===-- MachineFunctionPass.cpp -------------------------------------------===//
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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 contains the definitions of the MachineFunctionPass members.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Analysis/ScalarEvolution.h"
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#include "llvm/Analysis/IVUsers.h"
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#include "llvm/Analysis/LiveValues.h"
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#include "llvm/Analysis/LoopDependenceAnalysis.h"
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#include "llvm/Analysis/MemoryDependenceAnalysis.h"
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#include "llvm/CodeGen/MachineFunctionAnalysis.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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using namespace llvm;
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bool MachineFunctionPass::runOnFunction(Function &F) {
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// Do not codegen any 'available_externally' functions at all, they have
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// definitions outside the translation unit.
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if (F.hasAvailableExternallyLinkage())
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return false;
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MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
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return runOnMachineFunction(MF);
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}
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void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<MachineFunctionAnalysis>();
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AU.addPreserved<MachineFunctionAnalysis>();
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// MachineFunctionPass preserves all LLVM IR passes, but there's no
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// high-level way to express this. Instead, just list a bunch of
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// passes explicitly.
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AU.addPreserved<AliasAnalysis>();
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AU.addPreserved<ScalarEvolution>();
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AU.addPreserved<IVUsers>();
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AU.addPreserved<LoopDependenceAnalysis>();
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AU.addPreserved<MemoryDependenceAnalysis>();
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AU.addPreserved<LiveValues>();
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AU.addPreserved<DominatorTree>();
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AU.addPreserved<DominanceFrontier>();
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AU.addPreserved<LoopInfo>();
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FunctionPass::getAnalysisUsage(AU);
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}
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