llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
2010-08-06 18:33:48 +00:00

63 lines
1.9 KiB
C++

//===-- MachineFunctionAnalysis.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 MachineFunctionAnalysis members.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
using namespace llvm;
// Register this pass with PassInfo directly to avoid having to define
// a default constructor.
static PassInfo
X("Machine Function Analysis", "machine-function-analysis",
&MachineFunctionAnalysis::ID, 0,
/*CFGOnly=*/false, /*is_analysis=*/true);
char MachineFunctionAnalysis::ID = 0;
MachineFunctionAnalysis::MachineFunctionAnalysis(const TargetMachine &tm,
CodeGenOpt::Level OL) :
FunctionPass(ID), TM(tm), OptLevel(OL), MF(0) {
}
MachineFunctionAnalysis::~MachineFunctionAnalysis() {
releaseMemory();
assert(!MF && "MachineFunctionAnalysis left initialized!");
}
void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<MachineModuleInfo>();
}
bool MachineFunctionAnalysis::doInitialization(Module &M) {
MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
assert(MMI && "MMI not around yet??");
MMI->setModule(&M);
NextFnNum = 0;
return false;
}
bool MachineFunctionAnalysis::runOnFunction(Function &F) {
assert(!MF && "MachineFunctionAnalysis already initialized!");
MF = new MachineFunction(&F, TM, NextFnNum++,
getAnalysis<MachineModuleInfo>());
return false;
}
void MachineFunctionAnalysis::releaseMemory() {
delete MF;
MF = 0;
}