MachineFunctionAnalysis.cpp [plain text]
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
using namespace llvm;
static PassInfo
X("Machine Function Analysis", "machine-function-analysis",
intptr_t(&MachineFunctionAnalysis::ID), 0,
false, 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!");
}
bool MachineFunctionAnalysis::runOnFunction(Function &F) {
assert(!MF && "MachineFunctionAnalysis already initialized!");
MF = new MachineFunction(&F, TM, NextFnNum++,
getAnalysis<MachineModuleInfo>().getContext());
return false;
}
void MachineFunctionAnalysis::releaseMemory() {
delete MF;
MF = 0;
}
void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<MachineModuleInfo>();
}