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/Analysis/AliasAnalysis.h" 15 #include "llvm/Analysis/ScalarEvolution.h" 16 #include "llvm/Analysis/IVUsers.h" 17 #include "llvm/Analysis/LiveValues.h" 18 #include "llvm/Analysis/LoopDependenceAnalysis.h" 19 #include "llvm/Analysis/MemoryDependenceAnalysis.h" 20 #include "llvm/CodeGen/MachineFunctionAnalysis.h" 21 #include "llvm/CodeGen/MachineFunctionPass.h" 22 using namespace llvm; 23 24 bool MachineFunctionPass::runOnFunction(Function &F) { 25 // Do not codegen any 'available_externally' functions at all, they have 26 // definitions outside the translation unit. 27 if (F.hasAvailableExternallyLinkage()) 28 return false; 29 30 MachineFunction &MF = getAnalysis<MachineFunctionAnalysis>().getMF(); 31 return runOnMachineFunction(MF); 32 } 33 34 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const { 35 AU.addRequired<MachineFunctionAnalysis>(); 36 37 // MachineFunctionPass preserves all LLVM IR passes, but there's no 38 // high-level way to express this. Instead, just list a bunch of 39 // passes explicitly. 40 AU.addPreserved<AliasAnalysis>(); 41 AU.addPreserved<ScalarEvolution>(); 42 AU.addPreserved<IVUsers>(); 43 AU.addPreserved<LoopDependenceAnalysis>(); 44 AU.addPreserved<MemoryDependenceAnalysis>(); 45 AU.addPreserved<LiveValues>(); 46 AU.addPreserved<MachineFunctionAnalysis>(); 47 AU.setPreservesCFG(); 48 49 FunctionPass::getAnalysisUsage(AU); 50 } 51