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
|
//===-- CGBlocks.h - state for LLVM CodeGen for blocks ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is the internal state used for llvm translation for block literals.
//
//===----------------------------------------------------------------------===//
#ifndef CLANG_CODEGEN_CGBLOCKS_H
#define CLANG_CODEGEN_CGBLOCKS_H
#include "CodeGenTypes.h"
#include "clang/AST/Type.h"
#include "llvm/Module.h"
#include "llvm/ADT/SmallVector.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprObjC.h"
#include <vector>
#include <map>
#include "CGBuilder.h"
#include "CGCall.h"
#include "CGValue.h"
namespace llvm {
class Module;
class Constant;
class Function;
class GlobalValue;
class TargetData;
class FunctionType;
class PointerType;
class Value;
class LLVMContext;
}
namespace clang {
namespace CodeGen {
class CodeGenModule;
class CGBlockInfo;
class BlockBase {
public:
enum {
BLOCK_HAS_COPY_DISPOSE = (1 << 25),
BLOCK_HAS_CXX_OBJ = (1 << 26),
BLOCK_IS_GLOBAL = (1 << 28),
BLOCK_USE_STRET = (1 << 29),
BLOCK_HAS_SIGNATURE = (1 << 30)
};
};
class BlockModule : public BlockBase {
ASTContext &Context;
llvm::Module &TheModule;
const llvm::TargetData &TheTargetData;
CodeGenTypes &Types;
CodeGenModule &CGM;
llvm::LLVMContext &VMContext;
ASTContext &getContext() const { return Context; }
llvm::Module &getModule() const { return TheModule; }
CodeGenTypes &getTypes() { return Types; }
const llvm::TargetData &getTargetData() const { return TheTargetData; }
public:
int getGlobalUniqueCount() { return ++Block.GlobalUniqueCount; }
const llvm::Type *getBlockDescriptorType();
const llvm::Type *getGenericBlockLiteralType();
llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, const char *);
const llvm::Type *BlockDescriptorType;
const llvm::Type *GenericBlockLiteralType;
struct {
int GlobalUniqueCount;
} Block;
const llvm::PointerType *PtrToInt8Ty;
std::map<uint64_t, llvm::Constant *> AssignCache;
std::map<uint64_t, llvm::Constant *> DestroyCache;
BlockModule(ASTContext &C, llvm::Module &M, const llvm::TargetData &TD,
CodeGenTypes &T, CodeGenModule &CodeGen)
: Context(C), TheModule(M), TheTargetData(TD), Types(T),
CGM(CodeGen), VMContext(M.getContext()),
BlockDescriptorType(0), GenericBlockLiteralType(0) {
Block.GlobalUniqueCount = 0;
PtrToInt8Ty = llvm::Type::getInt8PtrTy(M.getContext());
}
};
class BlockFunction : public BlockBase {
CodeGenModule &CGM;
ASTContext &getContext() const;
protected:
llvm::LLVMContext &VMContext;
public:
CodeGenFunction &CGF;
const CodeGen::CGBlockInfo *BlockInfo;
llvm::Value *BlockPointer;
const llvm::PointerType *PtrToInt8Ty;
struct HelperInfo {
int index;
int flag;
const BlockDeclRefExpr *cxxvar_import;
bool RequiresCopying;
};
enum {
BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
block, ... */
BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the __block
variable */
BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
helpers */
BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
support routines */
BLOCK_BYREF_CURRENT_MAX = 256
};
CGBuilderTy &Builder;
BlockFunction(CodeGenModule &cgm, CodeGenFunction &cgf, CGBuilderTy &B);
llvm::Constant *GenerateCopyHelperFunction(const CGBlockInfo &blockInfo);
llvm::Constant *GenerateDestroyHelperFunction(const CGBlockInfo &blockInfo);
llvm::Constant *GeneratebyrefCopyHelperFunction(const llvm::Type *, int flag,
const VarDecl *BD);
llvm::Constant *GeneratebyrefDestroyHelperFunction(const llvm::Type *T,
int flag,
const VarDecl *BD);
llvm::Constant *BuildbyrefCopyHelper(const llvm::Type *T, uint32_t flags,
unsigned Align, const VarDecl *BD);
llvm::Constant *BuildbyrefDestroyHelper(const llvm::Type *T, uint32_t flags,
unsigned Align, const VarDecl *BD);
void BuildBlockRelease(llvm::Value *DeclPtr, uint32_t flags);
};
} // end namespace CodeGen
} // end namespace clang
#endif
|
