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 void EmitTypeVerify(std::ostream &OS, const std::string &Val,
113 OS << " Assert1(" << Val << "->getTypeID() == "
114 << ArgType->getValueAsString("TypeVal") << ",\n"
115 << " \"Illegal intrinsic type!\", IF);\n";
117 // If this is a packed type, check that the subtype and size are correct.
118 if (ArgType->isSubClassOf("LLVMPackedType")) {
119 Record *SubType = ArgType->getValueAsDef("ElTy");
120 OS << " Assert1(cast<PackedType>(" << Val
121 << ")->getElementType()->getTypeID() == "
122 << SubType->getValueAsString("TypeVal") << ",\n"
123 << " \"Illegal intrinsic type!\", IF);\n";
124 OS << " Assert1(cast<PackedType>(" << Val << ")->getNumElements() == "
125 << ArgType->getValueAsInt("NumElts") << ",\n"
126 << " \"Illegal intrinsic type!\", IF);\n";
130 void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
132 OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
133 OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
134 OS << " switch (ID) {\n";
135 OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
136 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
137 OS << " case Intrinsic::" << Ints[i].EnumName << ":\t\t// "
138 << Ints[i].Name << "\n";
139 OS << " Assert1(FTy->getNumParams() == " << Ints[i].ArgTypes.size()-1
141 << " \"Illegal # arguments for intrinsic function!\", IF);\n";
142 EmitTypeVerify(OS, "FTy->getReturnType()", Ints[i].ArgTypeDefs[0]);
143 for (unsigned j = 1; j != Ints[i].ArgTypes.size(); ++j)
144 EmitTypeVerify(OS, "FTy->getParamType(" + utostr(j-1) + ")",
145 Ints[i].ArgTypeDefs[j]);
152 void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
154 OS << "// BasicAliasAnalysis code.\n";
155 OS << "#ifdef GET_MODREF_BEHAVIOR\n";
156 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
157 switch (Ints[i].ModRef) {
159 case CodeGenIntrinsic::NoMem:
160 OS << " NoMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
162 case CodeGenIntrinsic::ReadArgMem:
163 case CodeGenIntrinsic::ReadMem:
164 OS << " OnlyReadsMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
171 void IntrinsicEmitter::
172 EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
173 OS << "// SelectionDAGIsel code.\n";
174 OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
175 OS << " switch (IntrinsicID) {\n";
176 OS << " default: break;\n";
177 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
178 switch (Ints[i].ModRef) {
180 case CodeGenIntrinsic::NoMem:
181 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
185 OS << " return true; // These intrinsics have no side effects.\n";
190 void IntrinsicEmitter::
191 EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
192 OS << "// isInstructionTriviallyDead code.\n";
193 OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
194 OS << " switch (F->getIntrinsicID()) {\n";
195 OS << " default: break;\n";
196 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
197 switch (Ints[i].ModRef) {
199 case CodeGenIntrinsic::NoMem:
200 case CodeGenIntrinsic::ReadArgMem:
201 case CodeGenIntrinsic::ReadMem:
202 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
206 OS << " return true; // These intrinsics have no side effects.\n";
211 void IntrinsicEmitter::
212 EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
213 OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
214 OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
215 OS << " switch (F->getIntrinsicID()) {\n";
216 OS << " default: BuiltinName = \"\"; break;\n";
217 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
218 if (!Ints[i].GCCBuiltinName.empty()) {
219 OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
220 << Ints[i].GCCBuiltinName << "\"; break;\n";
227 void IntrinsicEmitter::
228 EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
230 typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
232 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
233 if (!Ints[i].GCCBuiltinName.empty()) {
234 std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
235 Ints[i].TargetPrefix);
236 if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
237 throw "Intrinsic '" + Ints[i].TheDef->getName() +
238 "': duplicate GCC builtin name!";
242 OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
243 OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
244 OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
245 OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
246 OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
248 // Note: this could emit significantly better code if we cared.
249 for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
251 if (!I->first.second.empty()) {
252 // Emit this as a strcmp, so it can be constant folded by the FE.
253 OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
256 OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
257 OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
260 OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";