llvm-6502/lib/CodeGen/MachineFunctionPass.cpp
Eric Christopher 1d8f83d0a0 Revert r100143.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100146 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-01 22:54:42 +00:00

51 lines
1.8 KiB
C++

//===-- MachineFunctionPass.cpp -------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the definitions of the MachineFunctionPass members.
//
//===----------------------------------------------------------------------===//
#include "llvm/Function.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
using namespace llvm;
bool MachineFunctionPass::runOnFunction(Function &F) {
// Do not codegen any 'available_externally' functions at all, they have
// definitions outside the translation unit.
if (F.hasAvailableExternallyLinkage())
return false;
MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF();
return runOnMachineFunction(MF);
}
void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<MachineFunctionAnalysis>();
AU.addPreserved<MachineFunctionAnalysis>();
// MachineFunctionPass preserves all LLVM IR passes, but there's no
// high-level way to express this. Instead, just list a bunch of
// passes explicitly. This does not include setPreservesCFG,
// because CodeGen overloads that to mean preserving the MachineBasicBlock
// CFG in addition to the LLVM IR CFG.
AU.addPreserved<AliasAnalysis>();
AU.addPreserved("scalar-evolution");
AU.addPreserved("iv-users");
AU.addPreserved("memdep");
AU.addPreserved("live-values");
AU.addPreserved("domtree");
AU.addPreserved("domfrontier");
AU.addPreserved("loops");
AU.addPreserved("lda");
FunctionPass::getAnalysisUsage(AU);
}