1 //===-- MachineFunctionPass.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 MachineFunctionPass members. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/CodeGen/MachineFunctionPass.h" 15 #include "llvm/Analysis/AliasAnalysis.h" 16 #include "llvm/Analysis/DominanceFrontier.h" 17 #include "llvm/Analysis/IVUsers.h" 18 #include "llvm/Analysis/LoopInfo.h" 19 #include "llvm/Analysis/MemoryDependenceAnalysis.h" 20 #include "llvm/Analysis/ScalarEvolution.h" 21 #include "llvm/CodeGen/MachineFunctionAnalysis.h" 22 #include "llvm/CodeGen/Passes.h" 23 #include "llvm/CodeGen/StackProtector.h" 24 #include "llvm/IR/Dominators.h" 25 #include "llvm/IR/Function.h" 26 using namespace llvm; 27 createPrinterPass(raw_ostream & O,const std::string & Banner) const28Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O, 29 const std::string &Banner) const { 30 return createMachineFunctionPrinterPass(O, Banner); 31 } 32 runOnFunction(Function & F)33bool MachineFunctionPass::runOnFunction(Function &F) { 34 // Do not codegen any 'available_externally' functions at all, they have 35 // definitions outside the translation unit. 36 if (F.hasAvailableExternallyLinkage()) 37 return false; 38 39 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF(); 40 return runOnMachineFunction(MF); 41 } 42 getAnalysisUsage(AnalysisUsage & AU) const43void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const { 44 AU.addRequired<MachineFunctionAnalysis>(); 45 AU.addPreserved<MachineFunctionAnalysis>(); 46 47 // MachineFunctionPass preserves all LLVM IR passes, but there's no 48 // high-level way to express this. Instead, just list a bunch of 49 // passes explicitly. This does not include setPreservesCFG, 50 // because CodeGen overloads that to mean preserving the MachineBasicBlock 51 // CFG in addition to the LLVM IR CFG. 52 AU.addPreserved<AliasAnalysis>(); 53 AU.addPreserved<DominanceFrontier>(); 54 AU.addPreserved<DominatorTreeWrapperPass>(); 55 AU.addPreserved<IVUsers>(); 56 AU.addPreserved<LoopInfoWrapperPass>(); 57 AU.addPreserved<MemoryDependenceAnalysis>(); 58 AU.addPreserved<ScalarEvolution>(); 59 AU.addPreserved<StackProtector>(); 60 61 FunctionPass::getAnalysisUsage(AU); 62 } 63