blob: 33d868920dcbafaf0de8438c17287d1b69053613 (
plain)
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
|
//===-- CGBuilder.h - Choose IRBuilder implementation ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef CLANG_CODEGEN_CGBUILDER_H
#define CLANG_CODEGEN_CGBUILDER_H
#include "llvm/Support/IRBuilder.h"
namespace clang {
namespace CodeGen {
// Don't preserve names on values in an optimized build.
#ifdef NDEBUG
typedef llvm::IRBuilder<false> CGBuilderSuperTy;
#else
typedef llvm::IRBuilder<> CGBuilderSuperTy;
#endif
/// IR generation's wrapper around an LLVM IRBuilder.
class CGBuilderTy : public CGBuilderSuperTy {
public:
CGBuilderTy(llvm::LLVMContext &Context) : CGBuilderSuperTy(Context) {}
CGBuilderTy(llvm::BasicBlock *Block) : CGBuilderSuperTy(Block) {}
CGBuilderTy(llvm::BasicBlock *Block, llvm::BasicBlock::iterator Point)
: CGBuilderSuperTy(Block, Point) {}
CGBuilderTy(const CGBuilderTy &Builder)
: CGBuilderSuperTy(Builder.getContext()) {
if (Builder.GetInsertBlock())
SetInsertPoint(Builder.GetInsertBlock(), Builder.GetInsertPoint());
}
/// A saved insertion point.
class InsertPoint {
llvm::BasicBlock *Block;
llvm::BasicBlock::iterator Point;
public:
InsertPoint(llvm::BasicBlock *Block, llvm::BasicBlock::iterator Point)
: Block(Block), Point(Point) {}
bool isSet() const { return (Block != 0); }
llvm::BasicBlock *getBlock() const { return Block; }
llvm::BasicBlock::iterator getPoint() const { return Point; }
};
InsertPoint saveIP() const {
return InsertPoint(GetInsertBlock(), GetInsertPoint());
}
InsertPoint saveAndClearIP() {
InsertPoint IP(GetInsertBlock(), GetInsertPoint());
ClearInsertionPoint();
return IP;
}
void restoreIP(InsertPoint IP) {
if (IP.isSet())
SetInsertPoint(IP.getBlock(), IP.getPoint());
else
ClearInsertionPoint();
}
};
} // end namespace CodeGen
} // end namespace clang
#endif
|
