1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
//===- LLVMContextImpl.cpp - Implement LLVMContextImpl --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the opaque LLVMContextImpl.
//
//===----------------------------------------------------------------------===//
#include "LLVMContextImpl.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/OptBisect.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/ManagedStatic.h"
#include <cassert>
#include <utility>
using namespace llvm;
LLVMContextImpl::LLVMContextImpl(LLVMContext &C)
: DiagHandler(std::make_unique<DiagnosticHandler>()),
VoidTy(C, Type::VoidTyID),
LabelTy(C, Type::LabelTyID),
HalfTy(C, Type::HalfTyID),
BFloatTy(C, Type::BFloatTyID),
FloatTy(C, Type::FloatTyID),
DoubleTy(C, Type::DoubleTyID),
MetadataTy(C, Type::MetadataTyID),
TokenTy(C, Type::TokenTyID),
X86_FP80Ty(C, Type::X86_FP80TyID),
FP128Ty(C, Type::FP128TyID),
PPC_FP128Ty(C, Type::PPC_FP128TyID),
X86_MMXTy(C, Type::X86_MMXTyID),
X86_AMXTy(C, Type::X86_AMXTyID),
Int1Ty(C, 1),
Int8Ty(C, 8),
Int16Ty(C, 16),
Int32Ty(C, 32),
Int64Ty(C, 64),
Int128Ty(C, 128) {}
LLVMContextImpl::~LLVMContextImpl() {
// NOTE: We need to delete the contents of OwnedModules, but Module's dtor
// will call LLVMContextImpl::removeModule, thus invalidating iterators into
// the container. Avoid iterators during this operation:
while (!OwnedModules.empty())
delete *OwnedModules.begin();
#ifndef NDEBUG
// Check for metadata references from leaked Values.
for (auto &Pair : ValueMetadata)
Pair.first->dump();
assert(ValueMetadata.empty() && "Values with metadata have been leaked");
#endif
// Drop references for MDNodes. Do this before Values get deleted to avoid
// unnecessary RAUW when nodes are still unresolved.
for (auto *I : DistinctMDNodes)
I->dropAllReferences();
#define HANDLE_MDNODE_LEAF_UNIQUABLE(CLASS) \
for (auto *I : CLASS##s) \
I->dropAllReferences();
#include "llvm/IR/Metadata.def"
// Also drop references that come from the Value bridges.
for (auto &Pair : ValuesAsMetadata)
Pair.second->dropUsers();
for (auto &Pair : MetadataAsValues)
Pair.second->dropUse();
// Destroy MDNodes.
for (MDNode *I : DistinctMDNodes)
I->deleteAsSubclass();
#define HANDLE_MDNODE_LEAF_UNIQUABLE(CLASS) \
for (CLASS * I : CLASS##s) \
delete I;
#include "llvm/IR/Metadata.def"
// Free the constants.
for (auto *I : ExprConstants)
I->dropAllReferences();
for (auto *I : ArrayConstants)
I->dropAllReferences();
for (auto *I : StructConstants)
I->dropAllReferences();
for (auto *I : VectorConstants)
I->dropAllReferences();
ExprConstants.freeConstants();
ArrayConstants.freeConstants();
StructConstants.freeConstants();
VectorConstants.freeConstants();
InlineAsms.freeConstants();
CAZConstants.clear();
CPNConstants.clear();
UVConstants.clear();
PVConstants.clear();
IntConstants.clear();
FPConstants.clear();
CDSConstants.clear();
// Destroy attribute node lists.
for (FoldingSetIterator<AttributeSetNode> I = AttrsSetNodes.begin(),
E = AttrsSetNodes.end(); I != E; ) {
FoldingSetIterator<AttributeSetNode> Elem = I++;
delete &*Elem;
}
// Destroy MetadataAsValues.
{
SmallVector<MetadataAsValue *, 8> MDVs;
MDVs.reserve(MetadataAsValues.size());
for (auto &Pair : MetadataAsValues)
MDVs.push_back(Pair.second);
MetadataAsValues.clear();
for (auto *V : MDVs)
delete V;
}
// Destroy ValuesAsMetadata.
for (auto &Pair : ValuesAsMetadata)
delete Pair.second;
}
void LLVMContextImpl::dropTriviallyDeadConstantArrays() {
SmallSetVector<ConstantArray *, 4> WorkList;
// When ArrayConstants are of substantial size and only a few in them are
// dead, starting WorkList with all elements of ArrayConstants can be
// wasteful. Instead, starting WorkList with only elements that have empty
// uses.
for (ConstantArray *C : ArrayConstants)
if (C->use_empty())
WorkList.insert(C);
while (!WorkList.empty()) {
ConstantArray *C = WorkList.pop_back_val();
if (C->use_empty()) {
for (const Use &Op : C->operands()) {
if (auto *COp = dyn_cast<ConstantArray>(Op))
WorkList.insert(COp);
}
C->destroyConstant();
}
}
}
void Module::dropTriviallyDeadConstantArrays() {
Context.pImpl->dropTriviallyDeadConstantArrays();
}
namespace llvm {
/// Make MDOperand transparent for hashing.
///
/// This overload of an implementation detail of the hashing library makes
/// MDOperand hash to the same value as a \a Metadata pointer.
///
/// Note that overloading \a hash_value() as follows:
///
/// \code
/// size_t hash_value(const MDOperand &X) { return hash_value(X.get()); }
/// \endcode
///
/// does not cause MDOperand to be transparent. In particular, a bare pointer
/// doesn't get hashed before it's combined, whereas \a MDOperand would.
static const Metadata *get_hashable_data(const MDOperand &X) { return X.get(); }
} // end namespace llvm
unsigned MDNodeOpsKey::calculateHash(MDNode *N, unsigned Offset) {
unsigned Hash = hash_combine_range(N->op_begin() + Offset, N->op_end());
#ifndef NDEBUG
{
SmallVector<Metadata *, 8> MDs(drop_begin(N->operands(), Offset));
unsigned RawHash = calculateHash(MDs);
assert(Hash == RawHash &&
"Expected hash of MDOperand to equal hash of Metadata*");
}
#endif
return Hash;
}
unsigned MDNodeOpsKey::calculateHash(ArrayRef<Metadata *> Ops) {
return hash_combine_range(Ops.begin(), Ops.end());
}
StringMapEntry<uint32_t> *LLVMContextImpl::getOrInsertBundleTag(StringRef Tag) {
uint32_t NewIdx = BundleTagCache.size();
return &*(BundleTagCache.insert(std::make_pair(Tag, NewIdx)).first);
}
void LLVMContextImpl::getOperandBundleTags(SmallVectorImpl<StringRef> &Tags) const {
Tags.resize(BundleTagCache.size());
for (const auto &T : BundleTagCache)
Tags[T.second] = T.first();
}
uint32_t LLVMContextImpl::getOperandBundleTagID(StringRef Tag) const {
auto I = BundleTagCache.find(Tag);
assert(I != BundleTagCache.end() && "Unknown tag!");
return I->second;
}
SyncScope::ID LLVMContextImpl::getOrInsertSyncScopeID(StringRef SSN) {
auto NewSSID = SSC.size();
assert(NewSSID < std::numeric_limits<SyncScope::ID>::max() &&
"Hit the maximum number of synchronization scopes allowed!");
return SSC.insert(std::make_pair(SSN, SyncScope::ID(NewSSID))).first->second;
}
void LLVMContextImpl::getSyncScopeNames(
SmallVectorImpl<StringRef> &SSNs) const {
SSNs.resize(SSC.size());
for (const auto &SSE : SSC)
SSNs[SSE.second] = SSE.first();
}
/// Gets the OptPassGate for this LLVMContextImpl, which defaults to the
/// singleton OptBisect if not explicitly set.
OptPassGate &LLVMContextImpl::getOptPassGate() const {
if (!OPG)
OPG = &(*OptBisector);
return *OPG;
}
void LLVMContextImpl::setOptPassGate(OptPassGate& OPG) {
this->OPG = &OPG;
}
|
