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//===-- 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/GCMetadata.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFunctionInitializer.h"
using namespace llvm;
char MachineFunctionAnalysis::ID = 0;
MachineFunctionAnalysis::MachineFunctionAnalysis(
const TargetMachine &tm, MachineFunctionInitializer *MFInitializer)
: FunctionPass(ID), TM(tm), MF(nullptr), MFInitializer(MFInitializer) {
initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
}
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>());
if (MFInitializer)
MFInitializer->initializeMachineFunction(*MF);
return false;
}
void MachineFunctionAnalysis::releaseMemory() {
delete MF;
MF = nullptr;
}
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