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/ADT/STLExtras.h"
16 #include "llvm/IR/Attributes.h"
17 #include "llvm/IR/DiagnosticInfo.h"
18 #include "llvm/IR/Module.h"
19 #include <algorithm>
20 using namespace llvm;
21 
22 LLVMContextImpl::LLVMContextImpl(LLVMContext &C)
23   : TheTrueVal(nullptr), TheFalseVal(nullptr),
24     VoidTy(C, Type::VoidTyID),
25     LabelTy(C, Type::LabelTyID),
26     HalfTy(C, Type::HalfTyID),
27     FloatTy(C, Type::FloatTyID),
28     DoubleTy(C, Type::DoubleTyID),
29     MetadataTy(C, Type::MetadataTyID),
30     X86_FP80Ty(C, Type::X86_FP80TyID),
31     FP128Ty(C, Type::FP128TyID),
32     PPC_FP128Ty(C, Type::PPC_FP128TyID),
33     X86_MMXTy(C, Type::X86_MMXTyID),
34     Int1Ty(C, 1),
35     Int8Ty(C, 8),
36     Int16Ty(C, 16),
37     Int32Ty(C, 32),
38     Int64Ty(C, 64) {
39   InlineAsmDiagHandler = nullptr;
40   InlineAsmDiagContext = nullptr;
41   DiagnosticHandler = nullptr;
42   DiagnosticContext = nullptr;
43   YieldCallback = nullptr;
44   YieldOpaqueHandle = nullptr;
45   NamedStructTypesUniqueID = 0;
46 }
47 
48 namespace {
49 struct DropReferences {
50   // Takes the value_type of a ConstantUniqueMap's internal map, whose 'second'
51   // is a Constant*.
52   template <typename PairT> void operator()(const PairT &P) {
53     P.second->dropAllReferences();
54   }
55 };
56 
57 // Temporary - drops pair.first instead of second.
58 struct DropFirst {
59   // Takes the value_type of a ConstantUniqueMap's internal map, whose 'second'
60   // is a Constant*.
61   template<typename PairT>
62   void operator()(const PairT &P) {
63     P.first->dropAllReferences();
64   }
65 };
66 }
67 
68 LLVMContextImpl::~LLVMContextImpl() {
69   // NOTE: We need to delete the contents of OwnedModules, but Module's dtor
70   // will call LLVMContextImpl::removeModule, thus invalidating iterators into
71   // the container. Avoid iterators during this operation:
72   while (!OwnedModules.empty())
73     delete *OwnedModules.begin();
74 
75   // Free the constants.  This is important to do here to ensure that they are
76   // freed before the LeakDetector is torn down.
77   std::for_each(ExprConstants.map_begin(), ExprConstants.map_end(),
78                 DropReferences());
79   std::for_each(ArrayConstants.map_begin(), ArrayConstants.map_end(),
80                 DropFirst());
81   std::for_each(StructConstants.map_begin(), StructConstants.map_end(),
82                 DropFirst());
83   std::for_each(VectorConstants.map_begin(), VectorConstants.map_end(),
84                 DropFirst());
85   ExprConstants.freeConstants();
86   ArrayConstants.freeConstants();
87   StructConstants.freeConstants();
88   VectorConstants.freeConstants();
89   DeleteContainerSeconds(CAZConstants);
90   DeleteContainerSeconds(CPNConstants);
91   DeleteContainerSeconds(UVConstants);
92   InlineAsms.freeConstants();
93   DeleteContainerSeconds(IntConstants);
94   DeleteContainerSeconds(FPConstants);
95 
96   for (StringMap<ConstantDataSequential*>::iterator I = CDSConstants.begin(),
97        E = CDSConstants.end(); I != E; ++I)
98     delete I->second;
99   CDSConstants.clear();
100 
101   // Destroy attributes.
102   for (FoldingSetIterator<AttributeImpl> I = AttrsSet.begin(),
103          E = AttrsSet.end(); I != E; ) {
104     FoldingSetIterator<AttributeImpl> Elem = I++;
105     delete &*Elem;
106   }
107 
108   // Destroy attribute lists.
109   for (FoldingSetIterator<AttributeSetImpl> I = AttrsLists.begin(),
110          E = AttrsLists.end(); I != E; ) {
111     FoldingSetIterator<AttributeSetImpl> Elem = I++;
112     delete &*Elem;
113   }
114 
115   // Destroy attribute node lists.
116   for (FoldingSetIterator<AttributeSetNode> I = AttrsSetNodes.begin(),
117          E = AttrsSetNodes.end(); I != E; ) {
118     FoldingSetIterator<AttributeSetNode> Elem = I++;
119     delete &*Elem;
120   }
121 
122   // Destroy MDNodes.  ~MDNode can move and remove nodes between the MDNodeSet
123   // and the NonUniquedMDNodes sets, so copy the values out first.
124   SmallVector<MDNode*, 8> MDNodes;
125   MDNodes.reserve(MDNodeSet.size() + NonUniquedMDNodes.size());
126   for (FoldingSetIterator<MDNode> I = MDNodeSet.begin(), E = MDNodeSet.end();
127        I != E; ++I)
128     MDNodes.push_back(&*I);
129   MDNodes.append(NonUniquedMDNodes.begin(), NonUniquedMDNodes.end());
130   for (SmallVectorImpl<MDNode *>::iterator I = MDNodes.begin(),
131          E = MDNodes.end(); I != E; ++I)
132     (*I)->destroy();
133   assert(MDNodeSet.empty() && NonUniquedMDNodes.empty() &&
134          "Destroying all MDNodes didn't empty the Context's sets.");
135 
136   // Destroy MDStrings.
137   DeleteContainerSeconds(MDStringCache);
138 }
139 
140 // ConstantsContext anchors
141 void UnaryConstantExpr::anchor() { }
142 
143 void BinaryConstantExpr::anchor() { }
144 
145 void SelectConstantExpr::anchor() { }
146 
147 void ExtractElementConstantExpr::anchor() { }
148 
149 void InsertElementConstantExpr::anchor() { }
150 
151 void ShuffleVectorConstantExpr::anchor() { }
152 
153 void ExtractValueConstantExpr::anchor() { }
154 
155 void InsertValueConstantExpr::anchor() { }
156 
157 void GetElementPtrConstantExpr::anchor() { }
158 
159 void CompareConstantExpr::anchor() { }
160