1 //===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend emits information about intrinsic functions.
12 //===----------------------------------------------------------------------===//
14 #include "IntrinsicEmitter.h"
16 #include "llvm/ADT/StringExtras.h"
20 //===----------------------------------------------------------------------===//
21 // IntrinsicEmitter Implementation
22 //===----------------------------------------------------------------------===//
24 void IntrinsicEmitter::run(std::ostream &OS) {
25 EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
27 std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
29 // Emit the enum information.
30 EmitEnumInfo(Ints, OS);
32 // Emit the intrinsic ID -> name table.
33 EmitIntrinsicToNameTable(Ints, OS);
35 // Emit the function name recognizer.
36 EmitFnNameRecognizer(Ints, OS);
38 // Emit the intrinsic verifier.
39 EmitVerifier(Ints, OS);
41 // Emit mod/ref info for each function.
42 EmitModRefInfo(Ints, OS);
44 // Emit table of non-memory accessing intrinsics.
45 EmitNoMemoryInfo(Ints, OS);
47 // Emit side effect info for each intrinsic.
48 EmitSideEffectInfo(Ints, OS);
50 // Emit a list of intrinsics with corresponding GCC builtins.
51 EmitGCCBuiltinList(Ints, OS);
53 // Emit code to translate GCC builtins into LLVM intrinsics.
54 EmitIntrinsicToGCCBuiltinMap(Ints, OS);
57 void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
59 OS << "// Enum values for Intrinsics.h\n";
60 OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
61 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
62 OS << " " << Ints[i].EnumName;
63 OS << ((i != e-1) ? ", " : " ");
64 OS << std::string(40-Ints[i].EnumName.size(), ' ')
65 << "// " << Ints[i].Name << "\n";
70 void IntrinsicEmitter::
71 EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
73 // Build a function name -> intrinsic name mapping.
74 std::map<std::string, std::string> IntMapping;
75 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
76 IntMapping[Ints[i].Name] = Ints[i].EnumName;
78 OS << "// Function name -> enum value recognizer code.\n";
79 OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
80 OS << " switch (Name[5]) {\n";
81 OS << " default: break;\n";
82 // Emit the intrinsics in sorted order.
84 for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
85 E = IntMapping.end(); I != E; ++I) {
86 if (I->first[5] != LastChar) {
87 LastChar = I->first[5];
88 OS << " case '" << LastChar << "':\n";
91 OS << " if (Name == \"" << I->first << "\") return Intrinsic::"
92 << I->second << ";\n";
95 OS << " // The 'llvm.' namespace is reserved!\n";
96 OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n";
100 void IntrinsicEmitter::
101 EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
103 OS << "// Intrinsic ID to name table\n";
104 OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
105 OS << " // Note that entry #0 is the invalid intrinsic!\n";
106 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
107 OS << " \"" << Ints[i].Name << "\",\n";
111 static bool EmitTypeVerify(std::ostream &OS, Record *ArgType) {
112 if (ArgType->getValueAsString("TypeVal") == "...") return true;
114 OS << "(int)" << ArgType->getValueAsString("TypeVal") << ", ";
115 // If this is an integer type, check the width is correct.
116 if (ArgType->isSubClassOf("LLVMIntegerType"))
117 OS << ArgType->getValueAsInt("Width") << ", ";
119 // If this is a packed type, check that the subtype and size are correct.
120 else if (ArgType->isSubClassOf("LLVMPackedType")) {
121 EmitTypeVerify(OS, ArgType->getValueAsDef("ElTy"));
122 OS << ArgType->getValueAsInt("NumElts") << ", ";
128 /// RecordListComparator - Provide a determinstic comparator for lists of
131 struct RecordListComparator {
132 bool operator()(const std::vector<Record*> &LHS,
133 const std::vector<Record*> &RHS) const {
136 if (i == RHS.size()) return false; // RHS is shorter than LHS.
137 if (LHS[i] != RHS[i])
138 return LHS[i]->getName() < RHS[i]->getName();
139 } while (++i != LHS.size());
141 return i != RHS.size();
146 void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
148 OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
149 OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
150 OS << " switch (ID) {\n";
151 OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
153 // This checking can emit a lot of very common code. To reduce the amount of
154 // code that we emit, batch up cases that have identical types. This avoids
155 // problems where GCC can run out of memory compiling Verifier.cpp.
156 typedef std::map<std::vector<Record*>, std::vector<unsigned>,
157 RecordListComparator> MapTy;
158 MapTy UniqueArgInfos;
160 // Compute the unique argument type info.
161 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
162 UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
164 // Loop through the array, emitting one comparison for each batch.
165 for (MapTy::iterator I = UniqueArgInfos.begin(),
166 E = UniqueArgInfos.end(); I != E; ++I) {
167 for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
168 OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
169 << Ints[I->second[i]].Name << "\n";
172 const std::vector<Record*> &ArgTypes = I->first;
173 OS << " VerifyIntrinsicPrototype(IF, ";
175 for (unsigned j = 0; j != ArgTypes.size(); ++j) {
176 VarArg = EmitTypeVerify(OS, ArgTypes[j]);
178 if ((j+1) != ArgTypes.size())
179 throw "Var arg type not last argument";
184 OS << (VarArg ? "-2);\n" : "-1);\n");
191 void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
193 OS << "// BasicAliasAnalysis code.\n";
194 OS << "#ifdef GET_MODREF_BEHAVIOR\n";
195 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
196 switch (Ints[i].ModRef) {
198 case CodeGenIntrinsic::NoMem:
199 OS << " NoMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
201 case CodeGenIntrinsic::ReadArgMem:
202 case CodeGenIntrinsic::ReadMem:
203 OS << " OnlyReadsMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
210 void IntrinsicEmitter::
211 EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
212 OS << "// SelectionDAGIsel code.\n";
213 OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
214 OS << " switch (IntrinsicID) {\n";
215 OS << " default: break;\n";
216 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
217 switch (Ints[i].ModRef) {
219 case CodeGenIntrinsic::NoMem:
220 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
224 OS << " return true; // These intrinsics have no side effects.\n";
229 void IntrinsicEmitter::
230 EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
231 OS << "// Return true if doesn't access or only reads memory.\n";
232 OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
233 OS << " switch (IntrinsicID) {\n";
234 OS << " default: break;\n";
235 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
236 switch (Ints[i].ModRef) {
238 case CodeGenIntrinsic::NoMem:
239 case CodeGenIntrinsic::ReadArgMem:
240 case CodeGenIntrinsic::ReadMem:
241 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
245 OS << " return true; // These intrinsics have no side effects.\n";
250 void IntrinsicEmitter::
251 EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
252 OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
253 OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
254 OS << " switch (F->getIntrinsicID()) {\n";
255 OS << " default: BuiltinName = \"\"; break;\n";
256 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
257 if (!Ints[i].GCCBuiltinName.empty()) {
258 OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
259 << Ints[i].GCCBuiltinName << "\"; break;\n";
266 void IntrinsicEmitter::
267 EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
269 typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
271 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
272 if (!Ints[i].GCCBuiltinName.empty()) {
273 std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
274 Ints[i].TargetPrefix);
275 if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
276 throw "Intrinsic '" + Ints[i].TheDef->getName() +
277 "': duplicate GCC builtin name!";
281 OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
282 OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
283 OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
284 OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
285 OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
287 // Note: this could emit significantly better code if we cared.
288 for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
290 if (!I->first.second.empty()) {
291 // Emit this as a strcmp, so it can be constant folded by the FE.
292 OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
295 OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
296 OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
299 OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";