/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Basic/Builtins.cpp
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1 | | //===--- Builtins.cpp - Builtin function implementation -------------------===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This file implements various things for builtin functions. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #include "clang/Basic/Builtins.h" |
14 | | #include "clang/Basic/IdentifierTable.h" |
15 | | #include "clang/Basic/LangOptions.h" |
16 | | #include "clang/Basic/TargetInfo.h" |
17 | | #include "llvm/ADT/StringRef.h" |
18 | | using namespace clang; |
19 | | |
20 | | static const Builtin::Info BuiltinInfo[] = { |
21 | | { "not a builtin function", nullptr, nullptr, nullptr, ALL_LANGUAGES,nullptr}, |
22 | | #define BUILTIN(ID, TYPE, ATTRS) \ |
23 | | { #ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr }, |
24 | | #define LANGBUILTIN(ID, TYPE, ATTRS, LANGS) \ |
25 | | { #ID, TYPE, ATTRS, nullptr, LANGS, nullptr }, |
26 | | #define LIBBUILTIN(ID, TYPE, ATTRS, HEADER, LANGS) \ |
27 | | { #ID, TYPE, ATTRS, HEADER, LANGS, nullptr }, |
28 | | #include "clang/Basic/Builtins.def" |
29 | | }; |
30 | | |
31 | 392M | const Builtin::Info &Builtin::Context::getRecord(unsigned ID) const { |
32 | 392M | if (ID < Builtin::FirstTSBuiltin) |
33 | 6.73M | return BuiltinInfo[ID]; |
34 | 385M | assert(((ID - Builtin::FirstTSBuiltin) < |
35 | 385M | (TSRecords.size() + AuxTSRecords.size())) && |
36 | 385M | "Invalid builtin ID!"); |
37 | 385M | if (isAuxBuiltinID(ID)) |
38 | 61 | return AuxTSRecords[getAuxBuiltinID(ID) - Builtin::FirstTSBuiltin]; |
39 | 385M | return TSRecords[ID - Builtin::FirstTSBuiltin]; |
40 | 385M | } |
41 | | |
42 | | void Builtin::Context::InitializeTarget(const TargetInfo &Target, |
43 | 89.3k | const TargetInfo *AuxTarget) { |
44 | 89.3k | assert(TSRecords.empty() && "Already initialized target?"); |
45 | 0 | TSRecords = Target.getTargetBuiltins(); |
46 | 89.3k | if (AuxTarget) |
47 | 124 | AuxTSRecords = AuxTarget->getTargetBuiltins(); |
48 | 89.3k | } |
49 | | |
50 | 142 | bool Builtin::Context::isBuiltinFunc(llvm::StringRef FuncName) { |
51 | 142 | bool InStdNamespace = FuncName.consume_front("std-"); |
52 | 127k | for (unsigned i = Builtin::NotBuiltin + 1; i != Builtin::FirstTSBuiltin; |
53 | 127k | ++i127k ) { |
54 | 127k | if (FuncName.equals(BuiltinInfo[i].Name) && |
55 | 127k | (bool)strchr(BuiltinInfo[i].Attributes, 'z') == InStdNamespace137 ) |
56 | 137 | return strchr(BuiltinInfo[i].Attributes, 'f') != nullptr; |
57 | 127k | } |
58 | | |
59 | 5 | return false; |
60 | 142 | } |
61 | | |
62 | | /// Is this builtin supported according to the given language options? |
63 | | static bool builtinIsSupported(const Builtin::Info &BuiltinInfo, |
64 | 287M | const LangOptions &LangOpts) { |
65 | 287M | bool BuiltinsUnsupported = |
66 | 287M | LangOpts.NoBuiltin && strchr(BuiltinInfo.Attributes, 'f') != nullptr65.0M ; |
67 | 287M | bool CorBuiltinsUnsupported = |
68 | 287M | !LangOpts.Coroutines && (BuiltinInfo.Langs & COR_LANG)275M ; |
69 | 287M | bool MathBuiltinsUnsupported = |
70 | 287M | LangOpts.NoMathBuiltin && BuiltinInfo.HeaderName3.25k && |
71 | 287M | llvm::StringRef(BuiltinInfo.HeaderName).equals("math.h")442 ; |
72 | 287M | bool GnuModeUnsupported = !LangOpts.GNUMode && (BuiltinInfo.Langs & GNU_LANG)116M ; |
73 | 287M | bool MSModeUnsupported = |
74 | 287M | !LangOpts.MicrosoftExt && (BuiltinInfo.Langs & MS_LANG)250M ; |
75 | 287M | bool ObjCUnsupported = !LangOpts.ObjC && BuiltinInfo.Langs == OBJC_LANG213M ; |
76 | 287M | bool OclCUnsupported = |
77 | 287M | !LangOpts.OpenCL && (BuiltinInfo.Langs & ALL_OCL_LANGUAGES)286M ; |
78 | 287M | bool OclGASUnsupported = |
79 | 287M | !LangOpts.OpenCLGenericAddressSpace && (BuiltinInfo.Langs & OCL_GAS)286M ; |
80 | 287M | bool OclPipeUnsupported = |
81 | 287M | !LangOpts.OpenCLPipes && (BuiltinInfo.Langs & OCL_PIPE)286M ; |
82 | | // Device side enqueue is not supported until OpenCL 2.0. In 2.0 and higher |
83 | | // support is indicated with language option for blocks. |
84 | 287M | bool OclDSEUnsupported = |
85 | 287M | (LangOpts.getOpenCLCompatibleVersion() < 200 || !LangOpts.Blocks832k ) && |
86 | 287M | (BuiltinInfo.Langs & OCL_DSE)287M ; |
87 | 287M | bool OpenMPUnsupported = !LangOpts.OpenMP && BuiltinInfo.Langs == OMP_LANG260M ; |
88 | 287M | bool CUDAUnsupported = !LangOpts.CUDA && BuiltinInfo.Langs == CUDA_LANG286M ; |
89 | 287M | bool CPlusPlusUnsupported = |
90 | 287M | !LangOpts.CPlusPlus && BuiltinInfo.Langs == CXX_LANG74.1M ; |
91 | 287M | return !BuiltinsUnsupported && !CorBuiltinsUnsupported279M && |
92 | 287M | !MathBuiltinsUnsupported278M && !OclCUnsupported278M && !OclGASUnsupported278M && |
93 | 287M | !OclPipeUnsupported278M && !OclDSEUnsupported276M && !OpenMPUnsupported276M && |
94 | 287M | !GnuModeUnsupported276M && !MSModeUnsupported275M && !ObjCUnsupported266M && |
95 | 287M | !CPlusPlusUnsupported264M && !CUDAUnsupported264M ; |
96 | 287M | } |
97 | | |
98 | | /// initializeBuiltins - Mark the identifiers for all the builtins with their |
99 | | /// appropriate builtin ID # and mark any non-portable builtin identifiers as |
100 | | /// such. |
101 | | void Builtin::Context::initializeBuiltins(IdentifierTable &Table, |
102 | 85.3k | const LangOptions& LangOpts) { |
103 | | // Step #1: mark all target-independent builtins with their ID's. |
104 | 109M | for (unsigned i = Builtin::NotBuiltin+1; i != Builtin::FirstTSBuiltin; ++i109M ) |
105 | 109M | if (builtinIsSupported(BuiltinInfo[i], LangOpts)) { |
106 | 89.0M | Table.get(BuiltinInfo[i].Name).setBuiltinID(i); |
107 | 89.0M | } |
108 | | |
109 | | // Step #2: Register target-specific builtins. |
110 | 178M | for (unsigned i = 0, e = TSRecords.size(); i != e; ++i178M ) |
111 | 178M | if (builtinIsSupported(TSRecords[i], LangOpts)) |
112 | 175M | Table.get(TSRecords[i].Name).setBuiltinID(i + Builtin::FirstTSBuiltin); |
113 | | |
114 | | // Step #3: Register target-specific builtins for AuxTarget. |
115 | 219k | for (unsigned i = 0, e = AuxTSRecords.size(); i != e; ++i133k ) |
116 | 133k | Table.get(AuxTSRecords[i].Name) |
117 | 133k | .setBuiltinID(i + Builtin::FirstTSBuiltin + TSRecords.size()); |
118 | | |
119 | | // Step #4: Unregister any builtins specified by -fno-builtin-foo. |
120 | 85.3k | for (llvm::StringRef Name : LangOpts.NoBuiltinFuncs) { |
121 | 57 | bool InStdNamespace = Name.consume_front("std-"); |
122 | 57 | auto NameIt = Table.find(Name); |
123 | 57 | if (NameIt != Table.end()) { |
124 | 57 | unsigned ID = NameIt->second->getBuiltinID(); |
125 | 57 | if (ID != Builtin::NotBuiltin && isPredefinedLibFunction(ID) && |
126 | 57 | isInStdNamespace(ID) == InStdNamespace) { |
127 | 57 | Table.get(Name).setBuiltinID(Builtin::NotBuiltin); |
128 | 57 | } |
129 | 57 | } |
130 | 57 | } |
131 | 85.3k | } |
132 | | |
133 | 56.3k | unsigned Builtin::Context::getRequiredVectorWidth(unsigned ID) const { |
134 | 56.3k | const char *WidthPos = ::strchr(getRecord(ID).Attributes, 'V'); |
135 | 56.3k | if (!WidthPos) |
136 | 43.1k | return 0; |
137 | | |
138 | 13.1k | ++WidthPos; |
139 | 13.1k | assert(*WidthPos == ':' && |
140 | 13.1k | "Vector width specifier must be followed by a ':'"); |
141 | 0 | ++WidthPos; |
142 | | |
143 | 13.1k | char *EndPos; |
144 | 13.1k | unsigned Width = ::strtol(WidthPos, &EndPos, 10); |
145 | 13.1k | assert(*EndPos == ':' && "Vector width specific must end with a ':'"); |
146 | 0 | return Width; |
147 | 56.3k | } |
148 | | |
149 | | bool Builtin::Context::isLike(unsigned ID, unsigned &FormatIdx, |
150 | 38.0M | bool &HasVAListArg, const char *Fmt) const { |
151 | 38.0M | assert(Fmt && "Not passed a format string"); |
152 | 0 | assert(::strlen(Fmt) == 2 && |
153 | 38.0M | "Format string needs to be two characters long"); |
154 | 0 | assert(::toupper(Fmt[0]) == Fmt[1] && |
155 | 38.0M | "Format string is not in the form \"xX\""); |
156 | | |
157 | 0 | const char *Like = ::strpbrk(getRecord(ID).Attributes, Fmt); |
158 | 38.0M | if (!Like) |
159 | 38.0M | return false; |
160 | | |
161 | 2.24k | HasVAListArg = (*Like == Fmt[1]); |
162 | | |
163 | 2.24k | ++Like; |
164 | 2.24k | assert(*Like == ':' && "Format specifier must be followed by a ':'"); |
165 | 0 | ++Like; |
166 | | |
167 | 2.24k | assert(::strchr(Like, ':') && "Format specifier must end with a ':'"); |
168 | 0 | FormatIdx = ::strtol(Like, nullptr, 10); |
169 | 2.24k | return true; |
170 | 38.0M | } |
171 | | |
172 | | bool Builtin::Context::isPrintfLike(unsigned ID, unsigned &FormatIdx, |
173 | 19.0M | bool &HasVAListArg) { |
174 | 19.0M | return isLike(ID, FormatIdx, HasVAListArg, "pP"); |
175 | 19.0M | } |
176 | | |
177 | | bool Builtin::Context::isScanfLike(unsigned ID, unsigned &FormatIdx, |
178 | 19.0M | bool &HasVAListArg) { |
179 | 19.0M | return isLike(ID, FormatIdx, HasVAListArg, "sS"); |
180 | 19.0M | } |
181 | | |
182 | | bool Builtin::Context::performsCallback(unsigned ID, |
183 | 19.0M | SmallVectorImpl<int> &Encoding) const { |
184 | 19.0M | const char *CalleePos = ::strchr(getRecord(ID).Attributes, 'C'); |
185 | 19.0M | if (!CalleePos) |
186 | 19.0M | return false; |
187 | | |
188 | 0 | ++CalleePos; |
189 | 0 | assert(*CalleePos == '<' && |
190 | 0 | "Callback callee specifier must be followed by a '<'"); |
191 | 0 | ++CalleePos; |
192 | |
|
193 | 0 | char *EndPos; |
194 | 0 | int CalleeIdx = ::strtol(CalleePos, &EndPos, 10); |
195 | 0 | assert(CalleeIdx >= 0 && "Callee index is supposed to be positive!"); |
196 | 0 | Encoding.push_back(CalleeIdx); |
197 | |
|
198 | 0 | while (*EndPos == ',') { |
199 | 0 | const char *PayloadPos = EndPos + 1; |
200 | |
|
201 | 0 | int PayloadIdx = ::strtol(PayloadPos, &EndPos, 10); |
202 | 0 | Encoding.push_back(PayloadIdx); |
203 | 0 | } |
204 | |
|
205 | 0 | assert(*EndPos == '>' && "Callback callee specifier must end with a '>'"); |
206 | 0 | return true; |
207 | 19.0M | } |
208 | | |
209 | 57.8M | bool Builtin::Context::canBeRedeclared(unsigned ID) const { |
210 | 57.8M | return ID == Builtin::NotBuiltin || ID == Builtin::BI__va_start45.8M || |
211 | 57.8M | (45.8M !hasReferenceArgsOrResult(ID)45.8M && !hasCustomTypechecking(ID)45.8M ) || |
212 | 57.8M | isInStdNamespace(ID)74 ; |
213 | 57.8M | } |