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
|
//===--- Builtins.cpp - Builtin function implementation -------------------===//
//
// 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 various things for builtin functions.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/Builtins.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/StringRef.h"
using namespace clang;
static const Builtin::Info BuiltinInfo[] = {
{ "not a builtin function", nullptr, nullptr, nullptr, ALL_LANGUAGES,nullptr},
#define BUILTIN(ID, TYPE, ATTRS) \
{ #ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr },
#define LANGBUILTIN(ID, TYPE, ATTRS, LANGS) \
{ #ID, TYPE, ATTRS, nullptr, LANGS, nullptr },
#define LIBBUILTIN(ID, TYPE, ATTRS, HEADER, LANGS) \
{ #ID, TYPE, ATTRS, HEADER, LANGS, nullptr },
#include "clang/Basic/Builtins.def"
};
const Builtin::Info &Builtin::Context::getRecord(unsigned ID) const {
if (ID < Builtin::FirstTSBuiltin)
return BuiltinInfo[ID];
assert(((ID - Builtin::FirstTSBuiltin) <
(TSRecords.size() + AuxTSRecords.size())) &&
"Invalid builtin ID!");
if (isAuxBuiltinID(ID))
return AuxTSRecords[getAuxBuiltinID(ID) - Builtin::FirstTSBuiltin];
return TSRecords[ID - Builtin::FirstTSBuiltin];
}
void Builtin::Context::InitializeTarget(const TargetInfo &Target,
const TargetInfo *AuxTarget) {
assert(TSRecords.empty() && "Already initialized target?");
TSRecords = Target.getTargetBuiltins();
if (AuxTarget)
AuxTSRecords = AuxTarget->getTargetBuiltins();
}
bool Builtin::Context::isBuiltinFunc(llvm::StringRef FuncName) {
for (unsigned i = Builtin::NotBuiltin + 1; i != Builtin::FirstTSBuiltin; ++i)
if (FuncName.equals(BuiltinInfo[i].Name))
return strchr(BuiltinInfo[i].Attributes, 'f') != nullptr;
return false;
}
bool Builtin::Context::builtinIsSupported(const Builtin::Info &BuiltinInfo,
const LangOptions &LangOpts) {
bool BuiltinsUnsupported =
(LangOpts.NoBuiltin || LangOpts.isNoBuiltinFunc(BuiltinInfo.Name)) &&
strchr(BuiltinInfo.Attributes, 'f');
bool CorBuiltinsUnsupported =
!LangOpts.Coroutines && (BuiltinInfo.Langs & COR_LANG);
bool MathBuiltinsUnsupported =
LangOpts.NoMathBuiltin && BuiltinInfo.HeaderName &&
llvm::StringRef(BuiltinInfo.HeaderName).equals("math.h");
bool GnuModeUnsupported = !LangOpts.GNUMode && (BuiltinInfo.Langs & GNU_LANG);
bool MSModeUnsupported =
!LangOpts.MicrosoftExt && (BuiltinInfo.Langs & MS_LANG);
bool ObjCUnsupported = !LangOpts.ObjC && BuiltinInfo.Langs == OBJC_LANG;
bool OclCUnsupported =
!LangOpts.OpenCL && (BuiltinInfo.Langs & ALL_OCL_LANGUAGES);
bool OclGASUnsupported =
!LangOpts.OpenCLGenericAddressSpace && (BuiltinInfo.Langs & OCL_GAS);
bool OclPipeUnsupported =
!LangOpts.OpenCLPipes && (BuiltinInfo.Langs & OCL_PIPE);
// Device side enqueue is not supported until OpenCL 2.0. In 2.0 and higher
// support is indicated with language option for blocks.
bool OclDSEUnsupported =
(LangOpts.getOpenCLCompatibleVersion() < 200 || !LangOpts.Blocks) &&
(BuiltinInfo.Langs & OCL_DSE);
bool OpenMPUnsupported = !LangOpts.OpenMP && BuiltinInfo.Langs == OMP_LANG;
bool CUDAUnsupported = !LangOpts.CUDA && BuiltinInfo.Langs == CUDA_LANG;
bool CPlusPlusUnsupported =
!LangOpts.CPlusPlus && BuiltinInfo.Langs == CXX_LANG;
return !BuiltinsUnsupported && !CorBuiltinsUnsupported &&
!MathBuiltinsUnsupported && !OclCUnsupported && !OclGASUnsupported &&
!OclPipeUnsupported && !OclDSEUnsupported && !OpenMPUnsupported &&
!GnuModeUnsupported && !MSModeUnsupported && !ObjCUnsupported &&
!CPlusPlusUnsupported && !CUDAUnsupported;
}
/// initializeBuiltins - Mark the identifiers for all the builtins with their
/// appropriate builtin ID # and mark any non-portable builtin identifiers as
/// such.
void Builtin::Context::initializeBuiltins(IdentifierTable &Table,
const LangOptions& LangOpts) {
// Step #1: mark all target-independent builtins with their ID's.
for (unsigned i = Builtin::NotBuiltin+1; i != Builtin::FirstTSBuiltin; ++i)
if (builtinIsSupported(BuiltinInfo[i], LangOpts)) {
Table.get(BuiltinInfo[i].Name).setBuiltinID(i);
}
// Step #2: Register target-specific builtins.
for (unsigned i = 0, e = TSRecords.size(); i != e; ++i)
if (builtinIsSupported(TSRecords[i], LangOpts))
Table.get(TSRecords[i].Name).setBuiltinID(i + Builtin::FirstTSBuiltin);
// Step #3: Register target-specific builtins for AuxTarget.
for (unsigned i = 0, e = AuxTSRecords.size(); i != e; ++i)
Table.get(AuxTSRecords[i].Name)
.setBuiltinID(i + Builtin::FirstTSBuiltin + TSRecords.size());
}
unsigned Builtin::Context::getRequiredVectorWidth(unsigned ID) const {
const char *WidthPos = ::strchr(getRecord(ID).Attributes, 'V');
if (!WidthPos)
return 0;
++WidthPos;
assert(*WidthPos == ':' &&
"Vector width specifier must be followed by a ':'");
++WidthPos;
char *EndPos;
unsigned Width = ::strtol(WidthPos, &EndPos, 10);
assert(*EndPos == ':' && "Vector width specific must end with a ':'");
return Width;
}
bool Builtin::Context::isLike(unsigned ID, unsigned &FormatIdx,
bool &HasVAListArg, const char *Fmt) const {
assert(Fmt && "Not passed a format string");
assert(::strlen(Fmt) == 2 &&
"Format string needs to be two characters long");
assert(::toupper(Fmt[0]) == Fmt[1] &&
"Format string is not in the form \"xX\"");
const char *Like = ::strpbrk(getRecord(ID).Attributes, Fmt);
if (!Like)
return false;
HasVAListArg = (*Like == Fmt[1]);
++Like;
assert(*Like == ':' && "Format specifier must be followed by a ':'");
++Like;
assert(::strchr(Like, ':') && "Format specifier must end with a ':'");
FormatIdx = ::strtol(Like, nullptr, 10);
return true;
}
bool Builtin::Context::isPrintfLike(unsigned ID, unsigned &FormatIdx,
bool &HasVAListArg) {
return isLike(ID, FormatIdx, HasVAListArg, "pP");
}
bool Builtin::Context::isScanfLike(unsigned ID, unsigned &FormatIdx,
bool &HasVAListArg) {
return isLike(ID, FormatIdx, HasVAListArg, "sS");
}
bool Builtin::Context::performsCallback(unsigned ID,
SmallVectorImpl<int> &Encoding) const {
const char *CalleePos = ::strchr(getRecord(ID).Attributes, 'C');
if (!CalleePos)
return false;
++CalleePos;
assert(*CalleePos == '<' &&
"Callback callee specifier must be followed by a '<'");
++CalleePos;
char *EndPos;
int CalleeIdx = ::strtol(CalleePos, &EndPos, 10);
assert(CalleeIdx >= 0 && "Callee index is supposed to be positive!");
Encoding.push_back(CalleeIdx);
while (*EndPos == ',') {
const char *PayloadPos = EndPos + 1;
int PayloadIdx = ::strtol(PayloadPos, &EndPos, 10);
Encoding.push_back(PayloadIdx);
}
assert(*EndPos == '>' && "Callback callee specifier must end with a '>'");
return true;
}
bool Builtin::Context::canBeRedeclared(unsigned ID) const {
return ID == Builtin::NotBuiltin ||
ID == Builtin::BI__va_start ||
(!hasReferenceArgsOrResult(ID) &&
!hasCustomTypechecking(ID));
}
|
