/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 | 252M | const Builtin::Info &Builtin::Context::getRecord(unsigned ID) const { |
32 | 252M | if (ID < Builtin::FirstTSBuiltin) |
33 | 4.21M | return BuiltinInfo[ID]; |
34 | 248M | assert(((ID - Builtin::FirstTSBuiltin) < |
35 | 248M | (TSRecords.size() + AuxTSRecords.size())) && |
36 | 248M | "Invalid builtin ID!"); |
37 | 248M | if (isAuxBuiltinID(ID)) |
38 | 206 | return AuxTSRecords[getAuxBuiltinID(ID) - Builtin::FirstTSBuiltin]; |
39 | 248M | return TSRecords[ID - Builtin::FirstTSBuiltin]; |
40 | 248M | } |
41 | | |
42 | | void Builtin::Context::InitializeTarget(const TargetInfo &Target, |
43 | 84.1k | const TargetInfo *AuxTarget) { |
44 | 84.1k | assert(TSRecords.empty() && "Already initialized target?"); |
45 | 84.1k | TSRecords = Target.getTargetBuiltins(); |
46 | 84.1k | if (AuxTarget) |
47 | 138 | AuxTSRecords = AuxTarget->getTargetBuiltins(); |
48 | 84.1k | } |
49 | | |
50 | 138 | bool Builtin::Context::isBuiltinFunc(llvm::StringRef FuncName) { |
51 | 118k | for (unsigned i = Builtin::NotBuiltin + 1; i != Builtin::FirstTSBuiltin; ++i118k ) |
52 | 118k | if (FuncName.equals(BuiltinInfo[i].Name)) |
53 | 129 | return strchr(BuiltinInfo[i].Attributes, 'f') != nullptr; |
54 | | |
55 | 9 | return false; |
56 | 138 | } |
57 | | |
58 | | bool Builtin::Context::builtinIsSupported(const Builtin::Info &BuiltinInfo, |
59 | 255M | const LangOptions &LangOpts) { |
60 | 255M | bool BuiltinsUnsupported = |
61 | 255M | (LangOpts.NoBuiltin || LangOpts.isNoBuiltinFunc(BuiltinInfo.Name)193M ) && |
62 | 62.8M | strchr(BuiltinInfo.Attributes, 'f'); |
63 | 255M | bool MathBuiltinsUnsupported = |
64 | 255M | LangOpts.NoMathBuiltin && BuiltinInfo.HeaderName9.28k && |
65 | 2.36k | llvm::StringRef(BuiltinInfo.HeaderName).equals("math.h"); |
66 | 255M | bool GnuModeUnsupported = !LangOpts.GNUMode && (BuiltinInfo.Langs & GNU_LANG)107M ; |
67 | 255M | bool MSModeUnsupported = |
68 | 255M | !LangOpts.MicrosoftExt && (BuiltinInfo.Langs & MS_LANG)223M ; |
69 | 255M | bool ObjCUnsupported = !LangOpts.ObjC && BuiltinInfo.Langs == OBJC_LANG193M ; |
70 | 255M | bool OclC1Unsupported = (LangOpts.OpenCLVersion / 100) != 1 && |
71 | 255M | (BuiltinInfo.Langs & ALL_OCLC_LANGUAGES ) == OCLC1X_LANG; |
72 | 255M | bool OclC2Unsupported = |
73 | 255M | (LangOpts.OpenCLVersion != 200 && !LangOpts.OpenCLCPlusPlus255M ) && |
74 | 255M | (BuiltinInfo.Langs & ALL_OCLC_LANGUAGES) == OCLC20_LANG; |
75 | 255M | bool OclCUnsupported = !LangOpts.OpenCL && |
76 | 254M | (BuiltinInfo.Langs & ALL_OCLC_LANGUAGES); |
77 | 255M | bool OpenMPUnsupported = !LangOpts.OpenMP && BuiltinInfo.Langs == OMP_LANG231M ; |
78 | 255M | bool CPlusPlusUnsupported = |
79 | 255M | !LangOpts.CPlusPlus && BuiltinInfo.Langs == CXX_LANG73.6M ; |
80 | 255M | return !BuiltinsUnsupported && !MathBuiltinsUnsupported248M && !OclCUnsupported248M && |
81 | 245M | !OclC1Unsupported245M && !OclC2Unsupported && !OpenMPUnsupported245M && |
82 | 245M | !GnuModeUnsupported && !MSModeUnsupported245M && !ObjCUnsupported236M && |
83 | 235M | !CPlusPlusUnsupported; |
84 | 255M | } |
85 | | |
86 | | /// initializeBuiltins - Mark the identifiers for all the builtins with their |
87 | | /// appropriate builtin ID # and mark any non-portable builtin identifiers as |
88 | | /// such. |
89 | | void Builtin::Context::initializeBuiltins(IdentifierTable &Table, |
90 | 80.2k | const LangOptions& LangOpts) { |
91 | | // Step #1: mark all target-independent builtins with their ID's. |
92 | 99.3M | for (unsigned i = Builtin::NotBuiltin+1; i != Builtin::FirstTSBuiltin; ++i99.3M ) |
93 | 99.3M | if (builtinIsSupported(BuiltinInfo[i], LangOpts)) { |
94 | 81.0M | Table.get(BuiltinInfo[i].Name).setBuiltinID(i); |
95 | 81.0M | } |
96 | | |
97 | | // Step #2: Register target-specific builtins. |
98 | 156M | for (unsigned i = 0, e = TSRecords.size(); i != e; ++i156M ) |
99 | 156M | if (builtinIsSupported(TSRecords[i], LangOpts)) |
100 | 153M | Table.get(TSRecords[i].Name).setBuiltinID(i + Builtin::FirstTSBuiltin); |
101 | | |
102 | | // Step #3: Register target-specific builtins for AuxTarget. |
103 | 203k | for (unsigned i = 0, e = AuxTSRecords.size(); i != e; ++i122k ) |
104 | 122k | Table.get(AuxTSRecords[i].Name) |
105 | 122k | .setBuiltinID(i + Builtin::FirstTSBuiltin + TSRecords.size()); |
106 | 80.2k | } |
107 | | |
108 | 1.09k | void Builtin::Context::forgetBuiltin(unsigned ID, IdentifierTable &Table) { |
109 | 1.09k | Table.get(getRecord(ID).Name).setBuiltinID(0); |
110 | 1.09k | } |
111 | | |
112 | 53.5k | unsigned Builtin::Context::getRequiredVectorWidth(unsigned ID) const { |
113 | 53.5k | const char *WidthPos = ::strchr(getRecord(ID).Attributes, 'V'); |
114 | 53.5k | if (!WidthPos) |
115 | 42.6k | return 0; |
116 | | |
117 | 10.9k | ++WidthPos; |
118 | 10.9k | assert(*WidthPos == ':' && |
119 | 10.9k | "Vector width specifier must be followed by a ':'"); |
120 | 10.9k | ++WidthPos; |
121 | | |
122 | 10.9k | char *EndPos; |
123 | 10.9k | unsigned Width = ::strtol(WidthPos, &EndPos, 10); |
124 | 10.9k | assert(*EndPos == ':' && "Vector width specific must end with a ':'"); |
125 | 10.9k | return Width; |
126 | 10.9k | } |
127 | | |
128 | | bool Builtin::Context::isLike(unsigned ID, unsigned &FormatIdx, |
129 | 16.9M | bool &HasVAListArg, const char *Fmt) const { |
130 | 16.9M | assert(Fmt && "Not passed a format string"); |
131 | 16.9M | assert(::strlen(Fmt) == 2 && |
132 | 16.9M | "Format string needs to be two characters long"); |
133 | 16.9M | assert(::toupper(Fmt[0]) == Fmt[1] && |
134 | 16.9M | "Format string is not in the form \"xX\""); |
135 | | |
136 | 16.9M | const char *Like = ::strpbrk(getRecord(ID).Attributes, Fmt); |
137 | 16.9M | if (!Like) |
138 | 16.9M | return false; |
139 | | |
140 | 2.44k | HasVAListArg = (*Like == Fmt[1]); |
141 | | |
142 | 2.44k | ++Like; |
143 | 2.44k | assert(*Like == ':' && "Format specifier must be followed by a ':'"); |
144 | 2.44k | ++Like; |
145 | | |
146 | 2.44k | assert(::strchr(Like, ':') && "Format specifier must end with a ':'"); |
147 | 2.44k | FormatIdx = ::strtol(Like, nullptr, 10); |
148 | 2.44k | return true; |
149 | 2.44k | } |
150 | | |
151 | | bool Builtin::Context::isPrintfLike(unsigned ID, unsigned &FormatIdx, |
152 | 8.47M | bool &HasVAListArg) { |
153 | 8.47M | return isLike(ID, FormatIdx, HasVAListArg, "pP"); |
154 | 8.47M | } |
155 | | |
156 | | bool Builtin::Context::isScanfLike(unsigned ID, unsigned &FormatIdx, |
157 | 8.47M | bool &HasVAListArg) { |
158 | 8.47M | return isLike(ID, FormatIdx, HasVAListArg, "sS"); |
159 | 8.47M | } |
160 | | |
161 | | bool Builtin::Context::performsCallback(unsigned ID, |
162 | 8.47M | SmallVectorImpl<int> &Encoding) const { |
163 | 8.47M | const char *CalleePos = ::strchr(getRecord(ID).Attributes, 'C'); |
164 | 8.47M | if (!CalleePos) |
165 | 8.47M | return false; |
166 | | |
167 | 0 | ++CalleePos; |
168 | 0 | assert(*CalleePos == '<' && |
169 | 0 | "Callback callee specifier must be followed by a '<'"); |
170 | 0 | ++CalleePos; |
171 | |
|
172 | 0 | char *EndPos; |
173 | 0 | int CalleeIdx = ::strtol(CalleePos, &EndPos, 10); |
174 | 0 | assert(CalleeIdx >= 0 && "Callee index is supposed to be positive!"); |
175 | 0 | Encoding.push_back(CalleeIdx); |
176 | |
|
177 | 0 | while (*EndPos == ',') { |
178 | 0 | const char *PayloadPos = EndPos + 1; |
179 | |
|
180 | 0 | int PayloadIdx = ::strtol(PayloadPos, &EndPos, 10); |
181 | 0 | Encoding.push_back(PayloadIdx); |
182 | 0 | } |
183 | |
|
184 | 0 | assert(*EndPos == '>' && "Callback callee specifier must end with a '>'"); |
185 | 0 | return true; |
186 | 0 | } |
187 | | |
188 | 49.2M | bool Builtin::Context::canBeRedeclared(unsigned ID) const { |
189 | 49.2M | return ID == Builtin::NotBuiltin || |
190 | 36.1M | ID == Builtin::BI__va_start || |
191 | 36.1M | (!hasReferenceArgsOrResult(ID) && |
192 | 36.1M | !hasCustomTypechecking(ID)); |
193 | 49.2M | } |