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68e044e81a
to declare that they preserve other passes without needing to pull in additional header file or library dependencies. Convert MachineFunctionPass and CodeGenLICM to make use of this. llvm-svn: 83555
51 lines
1.8 KiB
C++
51 lines
1.8 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/Function.h"
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#include "llvm/Analysis/AliasAnalysis.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. This does not include setPreservesCFG,
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// because CodeGen overloads that to mean preserving the MachineBasicBlock
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// CFG in addition to the LLVM IR CFG.
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AU.addPreserved<AliasAnalysis>();
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AU.addPreserved("scalar-evolution");
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AU.addPreserved("iv-users");
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AU.addPreserved("memdep");
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AU.addPreserved("live-values");
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AU.addPreserved("domtree");
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AU.addPreserved("domfrontier");
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AU.addPreserved("loops");
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AU.addPreserved("lda");
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FunctionPass::getAnalysisUsage(AU);
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}
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