contrib/llvm/lib/CodeGen/MachineFunctionPass.cpp

   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/BasicAliasAnalysis.h"
  17 #include "llvm/Analysis/DominanceFrontier.h"
  18 #include "llvm/Analysis/GlobalsModRef.h"
  19 #include "llvm/Analysis/IVUsers.h"
  20 #include "llvm/Analysis/LoopInfo.h"
  21 #include "llvm/Analysis/MemoryDependenceAnalysis.h"
  22 #include "llvm/Analysis/ScalarEvolution.h"
  23 #include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
  24 #include "llvm/CodeGen/MachineFunction.h"
  25 #include "llvm/CodeGen/MachineModuleInfo.h"
  26 #include "llvm/CodeGen/Passes.h"
  27 #include "llvm/CodeGen/StackProtector.h"
  28 #include "llvm/IR/Dominators.h"
  29 #include "llvm/IR/Function.h"
  30
  31 using namespace llvm;
  32
  33 Pass *MachineFunctionPass::createPrinterPass(raw_ostream &O,
  34                                              const std::string &Banner) const {
  35   return createMachineFunctionPrinterPass(O, Banner);
  36 }
  37
  38 bool MachineFunctionPass::runOnFunction(Function &F) {
  39   // Do not codegen any 'available_externally' functions at all, they have
  40   // definitions outside the translation unit.
  41   if (F.hasAvailableExternallyLinkage())
  42     return false;
  43
  44   MachineModuleInfo &MMI = getAnalysis<MachineModuleInfo>();
  45   MachineFunction &MF = MMI.getOrCreateMachineFunction(F);
  46
  47   MachineFunctionProperties &MFProps = MF.getProperties();
  48
  49 #ifndef NDEBUG
  50   if (!MFProps.verifyRequiredProperties(RequiredProperties)) {
  51     errs() << "MachineFunctionProperties required by " << getPassName()
  52            << " pass are not met by function " << F.getName() << ".\n"
  53            << "Required properties: ";
  54     RequiredProperties.print(errs());
  55     errs() << "\nCurrent properties: ";
  56     MFProps.print(errs());
  57     errs() << "\n";
  58     llvm_unreachable("MachineFunctionProperties check failed");
  59   }
  60 #endif
  61
  62   bool RV = runOnMachineFunction(MF);
  63
  64   MFProps.set(SetProperties);
  65   MFProps.reset(ClearedProperties);
  66   return RV;
  67 }
  68
  69 void MachineFunctionPass::getAnalysisUsage(AnalysisUsage &AU) const {
  70   AU.addRequired<MachineModuleInfo>();
  71   AU.addPreserved<MachineModuleInfo>();
  72
  73   // MachineFunctionPass preserves all LLVM IR passes, but there's no
  74   // high-level way to express this. Instead, just list a bunch of
  75   // passes explicitly. This does not include setPreservesCFG,
  76   // because CodeGen overloads that to mean preserving the MachineBasicBlock
  77   // CFG in addition to the LLVM IR CFG.
  78   AU.addPreserved<BasicAAWrapperPass>();
  79   AU.addPreserved<DominanceFrontierWrapperPass>();
  80   AU.addPreserved<DominatorTreeWrapperPass>();
  81   AU.addPreserved<AAResultsWrapperPass>();
  82   AU.addPreserved<GlobalsAAWrapperPass>();
  83   AU.addPreserved<IVUsersWrapperPass>();
  84   AU.addPreserved<LoopInfoWrapperPass>();
  85   AU.addPreserved<MemoryDependenceWrapperPass>();
  86   AU.addPreserved<ScalarEvolutionWrapperPass>();
  87   AU.addPreserved<SCEVAAWrapperPass>();
  88   AU.addPreserved<StackProtector>();
  89
  90   FunctionPass::getAnalysisUsage(AU);
  91 }