lib/VMCore/LLVMContextImpl.cpp

   1 //===-- LLVMContextImpl.cpp - Implement LLVMContextImpl -------------------===//
   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 implements the opaque LLVMContextImpl.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "LLVMContextImpl.h"
  15 #include "llvm/Module.h"
  16 #include <algorithm>
  17 using namespace llvm;
  18
  19 LLVMContextImpl::LLVMContextImpl(LLVMContext &C)
  20   : TheTrueVal(0), TheFalseVal(0),
  21     VoidTy(C, Type::VoidTyID),
  22     LabelTy(C, Type::LabelTyID),
  23     FloatTy(C, Type::FloatTyID),
  24     DoubleTy(C, Type::DoubleTyID),
  25     MetadataTy(C, Type::MetadataTyID),
  26     X86_FP80Ty(C, Type::X86_FP80TyID),
  27     FP128Ty(C, Type::FP128TyID),
  28     PPC_FP128Ty(C, Type::PPC_FP128TyID),
  29     X86_MMXTy(C, Type::X86_MMXTyID),
  30     Int1Ty(C, 1),
  31     Int8Ty(C, 8),
  32     Int16Ty(C, 16),
  33     Int32Ty(C, 32),
  34     Int64Ty(C, 64) {
  35   InlineAsmDiagHandler = 0;
  36   InlineAsmDiagContext = 0;
  37   NamedStructTypesUniqueID = 0;
  38 }
  39
  40 namespace {
  41 struct DropReferences {
  42   // Takes the value_type of a ConstantUniqueMap's internal map, whose 'second'
  43   // is a Constant*.
  44   template<typename PairT>
  45   void operator()(const PairT &P) {
  46     P.second->dropAllReferences();
  47   }
  48 };
  49 }
  50
  51 LLVMContextImpl::~LLVMContextImpl() {
  52   // NOTE: We need to delete the contents of OwnedModules, but we have to
  53   // duplicate it into a temporary vector, because the destructor of Module
  54   // will try to remove itself from OwnedModules set.  This would cause
  55   // iterator invalidation if we iterated on the set directly.
  56   std::vector<Module*> Modules(OwnedModules.begin(), OwnedModules.end());
  57   for (std::vector<Module*>::iterator I = Modules.begin(), E = Modules.end();
  58        I != E; ++I)
  59     delete *I;
  60
  61   std::for_each(ExprConstants.map_begin(), ExprConstants.map_end(),
  62                 DropReferences());
  63   std::for_each(ArrayConstants.map_begin(), ArrayConstants.map_end(),
  64                 DropReferences());
  65   std::for_each(StructConstants.map_begin(), StructConstants.map_end(),
  66                 DropReferences());
  67   std::for_each(VectorConstants.map_begin(), VectorConstants.map_end(),
  68                 DropReferences());
  69   ExprConstants.freeConstants();
  70   ArrayConstants.freeConstants();
  71   StructConstants.freeConstants();
  72   VectorConstants.freeConstants();
  73   AggZeroConstants.freeConstants();
  74   NullPtrConstants.freeConstants();
  75   UndefValueConstants.freeConstants();
  76   InlineAsms.freeConstants();
  77   for (IntMapTy::iterator I = IntConstants.begin(), E = IntConstants.end();
  78        I != E; ++I) {
  79     delete I->second;
  80   }
  81   for (FPMapTy::iterator I = FPConstants.begin(), E = FPConstants.end();
  82        I != E; ++I) {
  83     delete I->second;
  84   }
  85
  86   // Destroy MDNodes.  ~MDNode can move and remove nodes between the MDNodeSet
  87   // and the NonUniquedMDNodes sets, so copy the values out first.
  88   SmallVector<MDNode*, 8> MDNodes;
  89   MDNodes.reserve(MDNodeSet.size() + NonUniquedMDNodes.size());
  90   for (FoldingSetIterator<MDNode> I = MDNodeSet.begin(), E = MDNodeSet.end();
  91        I != E; ++I) {
  92     MDNodes.push_back(&*I);
  93   }
  94   MDNodes.append(NonUniquedMDNodes.begin(), NonUniquedMDNodes.end());
  95   for (SmallVectorImpl<MDNode *>::iterator I = MDNodes.begin(),
  96          E = MDNodes.end(); I != E; ++I) {
  97     (*I)->destroy();
  98   }
  99   assert(MDNodeSet.empty() && NonUniquedMDNodes.empty() &&
 100          "Destroying all MDNodes didn't empty the Context's sets.");
 101   // Destroy MDStrings.
 102   for (StringMap<MDString*>::iterator I = MDStringCache.begin(),
 103          E = MDStringCache.end(); I != E; ++I)
 104     delete I->second;
 105 }