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 //===----------------------------------------------------------------------===//
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 using namespace llvm;
20 char MachineFunctionAnalysis::ID = 0;
22 MachineFunctionAnalysis::MachineFunctionAnalysis(const TargetMachine &tm) :
23 FunctionPass(ID), TM(tm), MF(nullptr) {
24 initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
25 }
27 MachineFunctionAnalysis::~MachineFunctionAnalysis() {
28 releaseMemory();
29 assert(!MF && "MachineFunctionAnalysis left initialized!");
30 }
32 void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
33 AU.setPreservesAll();
34 AU.addRequired<MachineModuleInfo>();
35 }
37 bool MachineFunctionAnalysis::doInitialization(Module &M) {
38 MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
39 assert(MMI && "MMI not around yet??");
40 MMI->setModule(&M);
41 NextFnNum = 0;
42 return false;
43 }
46 bool MachineFunctionAnalysis::runOnFunction(Function &F) {
47 assert(!MF && "MachineFunctionAnalysis already initialized!");
48 MF = new MachineFunction(&F, TM, NextFnNum++,
49 getAnalysis<MachineModuleInfo>(),
50 getAnalysisIfAvailable<GCModuleInfo>());
51 return false;
52 }
54 void MachineFunctionAnalysis::releaseMemory() {
55 delete MF;
56 MF = nullptr;
57 }