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" 19 using namespace llvm; 20 21 char MachineFunctionAnalysis::ID = 0; 22 23 MachineFunctionAnalysis::MachineFunctionAnalysis( 24 const TargetMachine &tm, MachineFunctionInitializer *MFInitializer) 25 : FunctionPass(ID), TM(tm), MF(nullptr), MFInitializer(MFInitializer) { 26 initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry()); 27 } 28 29 MachineFunctionAnalysis::~MachineFunctionAnalysis() { 30 releaseMemory(); 31 assert(!MF && "MachineFunctionAnalysis left initialized!"); 32 } 33 34 void MachineFunctionAnalysis::getAnalysisUsage(AnalysisUsage &AU) const { 35 AU.setPreservesAll(); 36 AU.addRequired<MachineModuleInfo>(); 37 } 38 39 bool 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 48 bool 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 57 void MachineFunctionAnalysis::releaseMemory() { 58 delete MF; 59 MF = nullptr; 60 } 61
