1//===-- MachineFunctionAnalysis.cpp ---------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the definitions of the MachineFunctionAnalysis members.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/CodeGen/MachineFunctionAnalysis.h"
15#include "llvm/CodeGen/GCMetadata.h"
16#include "llvm/CodeGen/MachineFunction.h"
17#include "llvm/CodeGen/MachineModuleInfo.h"
18#include "llvm/CodeGen/MachineFunctionInitializer.h"
19using namespace llvm;
20
21char MachineFunctionAnalysis::ID = 0;
22
23MachineFunctionAnalysis::MachineFunctionAnalysis(
24    const TargetMachine &tm, MachineFunctionInitializer *MFInitializer)
25    : FunctionPass(ID), TM(tm), MF(nullptr), MFInitializer(MFInitializer) {
26  initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
27}
28
29MachineFunctionAnalysis::~MachineFunctionAnalysis() {
30  releaseMemory();
31  assert(!MF && "MachineFunctionAnalysis left initialized!");
32}
33
34void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
35  AU.setPreservesAll();
36  AU.addRequired<MachineModuleInfo>();
37}
38
39bool MachineFunctionAnalysis::doInitialization(Module &M) {
40  MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
41  assert(MMI && "MMI not around yet??");
42  MMI->setModule(&M);
43  NextFnNum = 0;
44  return false;
45}
46
47
48bool MachineFunctionAnalysis::runOnFunction(Function &F) {
49  assert(!MF && "MachineFunctionAnalysis already initialized!");
50  MF = new MachineFunction(&F, TM, NextFnNum++,
51                           getAnalysis<MachineModuleInfo>());
52  if (MFInitializer)
53    MFInitializer->initializeMachineFunction(*MF);
54  return false;
55}
56
57void MachineFunctionAnalysis::releaseMemory() {
58  delete MF;
59  MF = nullptr;
60}
61