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//===-- 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/IR/Function.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Passes.h"
using namespace llvm;
Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O,
const std::string &Banner) const {
return createMachineFunctionPrinterPass(O, Banner);
}
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");
AU.addPreserved("stack-protector");
FunctionPass::getAnalysisUsage(AU);
}
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