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/LoopInfo.h" 20 #include "llvm/Analysis/MemoryDependenceAnalysis.h" 21 #include "llvm/Analysis/ScalarEvolution.h" 22 #include "llvm/CodeGen/MachineFunctionAnalysis.h" 23 #include "llvm/CodeGen/Passes.h" 24 #include "llvm/CodeGen/StackProtector.h" 25 #include "llvm/IR/Dominators.h" 26 #include "llvm/IR/Function.h" 27 using namespace llvm; 28 createPrinterPass(raw_ostream & O,const std::string & Banner) const29Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O, 30 const std::string &Banner) const { 31 return createMachineFunctionPrinterPass(O, Banner); 32 } 33 runOnFunction(Function & F)34bool MachineFunctionPass::runOnFunction(Function &F) { 35 // Do not codegen any 'available_externally' functions at all, they have 36 // definitions outside the translation unit. 37 if (F.hasAvailableExternallyLinkage()) 38 return false; 39 40 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF(); 41 return runOnMachineFunction(MF); 42 } 43 getAnalysisUsage(AnalysisUsage & AU) const44void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const { 45 AU.addRequired<MachineFunctionAnalysis>(); 46 AU.addPreserved<MachineFunctionAnalysis>(); 47 48 // MachineFunctionPass preserves all LLVM IR passes, but there's no 49 // high-level way to express this. Instead, just list a bunch of 50 // passes explicitly. This does not include setPreservesCFG, 51 // because CodeGen overloads that to mean preserving the MachineBasicBlock 52 // CFG in addition to the LLVM IR CFG. 53 AU.addPreserved<AliasAnalysis>(); 54 AU.addPreserved<DominanceFrontier>(); 55 AU.addPreserved<DominatorTreeWrapperPass>(); 56 AU.addPreserved<IVUsers>(); 57 AU.addPreserved<LoopInfo>(); 58 AU.addPreserved<MemoryDependenceAnalysis>(); 59 AU.addPreserved<ScalarEvolution>(); 60 AU.addPreserved<StackProtector>(); 61 62 FunctionPass::getAnalysisUsage(AU); 63 } 64