#include "IntrinsicEmitter.h"
#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include <algorithm>
using namespace llvm;
-//===----------------------------------------------------------------------===//
-// CodeGenIntrinsic Implementation
-//===----------------------------------------------------------------------===//
-
-std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
- std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
- return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
-}
-
-CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
- std::string DefName = R->getName();
-
- if (DefName.size() <= 4 ||
- std::string(DefName.begin(), DefName.begin()+4) != "int_")
- throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
- EnumName = std::string(DefName.begin()+4, DefName.end());
-
- Name = R->getValueAsString("LLVMName");
- if (Name == "") {
- // If an explicit name isn't specified, derive one from the DefName.
- Name = "llvm.";
- for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
- if (EnumName[i] == '_')
- Name += '.';
- else
- Name += EnumName[i];
- }
-}
-
//===----------------------------------------------------------------------===//
// IntrinsicEmitter Implementation
//===----------------------------------------------------------------------===//
// Emit the enum information.
EmitEnumInfo(Ints, OS);
+
+ // Emit the intrinsic ID -> name table.
+ EmitIntrinsicToNameTable(Ints, OS);
+
+ // Emit the function name recognizer.
+ EmitFnNameRecognizer(Ints, OS);
+
+ // Emit the intrinsic verifier.
+ EmitVerifier(Ints, OS);
+
+ // Emit mod/ref info for each function.
+ EmitModRefInfo(Ints, OS);
+
+ // Emit table of non-memory accessing intrinsics.
+ EmitNoMemoryInfo(Ints, OS);
+
+ // Emit side effect info for each intrinsic.
+ EmitSideEffectInfo(Ints, OS);
+
+ // Emit a list of intrinsics with corresponding GCC builtins.
+ EmitGCCBuiltinList(Ints, OS);
+
+ // Emit code to translate GCC builtins into LLVM intrinsics.
+ EmitIntrinsicToGCCBuiltinMap(Ints, OS);
}
void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
std::ostream &OS) {
+ OS << "// Enum values for Intrinsics.h\n";
OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
OS << " " << Ints[i].EnumName;
}
OS << "#endif\n\n";
}
+
+void IntrinsicEmitter::
+EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ // Build a function name -> intrinsic name mapping.
+ std::map<std::string, std::string> IntMapping;
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ IntMapping[Ints[i].Name] = Ints[i].EnumName;
+
+ OS << "// Function name -> enum value recognizer code.\n";
+ OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
+ OS << " switch (Name[5]) {\n";
+ OS << " default: break;\n";
+ // Emit the intrinsics in sorted order.
+ char LastChar = 0;
+ for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
+ E = IntMapping.end(); I != E; ++I) {
+ if (I->first[5] != LastChar) {
+ LastChar = I->first[5];
+ OS << " case '" << LastChar << "':\n";
+ }
+
+ OS << " if (Name == \"" << I->first << "\") return Intrinsic::"
+ << I->second << ";\n";
+ }
+ OS << " }\n";
+ OS << " // The 'llvm.' namespace is reserved!\n";
+ OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Intrinsic ID to name table\n";
+ OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
+ OS << " // Note that entry #0 is the invalid intrinsic!\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ OS << " \"" << Ints[i].Name << "\",\n";
+ OS << "#endif\n\n";
+}
+
+static void EmitTypeVerify(std::ostream &OS, Record *ArgType) {
+ OS << "(int)" << ArgType->getValueAsString("TypeVal") << ", ";
+ // If this is an integer type, check the width is correct.
+ if (ArgType->isSubClassOf("LLVMIntegerType"))
+ OS << ArgType->getValueAsInt("Width") << ", ";
+
+ // If this is a packed type, check that the subtype and size are correct.
+ else if (ArgType->isSubClassOf("LLVMPackedType")) {
+ EmitTypeVerify(OS, ArgType->getValueAsDef("ElTy"));
+ OS << ArgType->getValueAsInt("NumElts") << ", ";
+ }
+}
+
+/// RecordListComparator - Provide a determinstic comparator for lists of
+/// records.
+namespace {
+ struct RecordListComparator {
+ bool operator()(const std::vector<Record*> &LHS,
+ const std::vector<Record*> &RHS) const {
+ unsigned i = 0;
+ do {
+ if (i == RHS.size()) return false; // RHS is shorter than LHS.
+ if (LHS[i] != RHS[i])
+ return LHS[i]->getName() < RHS[i]->getName();
+ } while (++i != LHS.size());
+
+ return i != RHS.size();
+ }
+ };
+}
+
+void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
+ OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
+ OS << " switch (ID) {\n";
+ OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
+
+ // This checking can emit a lot of very common code. To reduce the amount of
+ // code that we emit, batch up cases that have identical types. This avoids
+ // problems where GCC can run out of memory compiling Verifier.cpp.
+ typedef std::map<std::vector<Record*>, std::vector<unsigned>,
+ RecordListComparator> MapTy;
+ MapTy UniqueArgInfos;
+
+ // Compute the unique argument type info.
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
+
+ // Loop through the array, emitting one comparison for each batch.
+ for (MapTy::iterator I = UniqueArgInfos.begin(),
+ E = UniqueArgInfos.end(); I != E; ++I) {
+ for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
+ OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
+ << Ints[I->second[i]].Name << "\n";
+ }
+
+ const std::vector<Record*> &ArgTypes = I->first;
+ OS << " VerifyIntrinsicPrototype(IF, ";
+ for (unsigned j = 0; j != ArgTypes.size(); ++j)
+ EmitTypeVerify(OS, ArgTypes[j]);
+ OS << "-1);\n";
+ OS << " break;\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ OS << "// BasicAliasAnalysis code.\n";
+ OS << "#ifdef GET_MODREF_BEHAVIOR\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ OS << " NoMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
+ break;
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " OnlyReadsMemoryTable->push_back(\"" << Ints[i].Name << "\");\n";
+ break;
+ }
+ }
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
+ OS << "// SelectionDAGIsel code.\n";
+ OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
+ OS << " switch (IntrinsicID) {\n";
+ OS << " default: break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
+ break;
+ }
+ }
+ OS << " return true; // These intrinsics have no side effects.\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Return true if doesn't access or only reads memory.\n";
+ OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
+ OS << " switch (IntrinsicID) {\n";
+ OS << " default: break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
+ break;
+ }
+ }
+ OS << " return true; // These intrinsics have no side effects.\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
+ OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
+ OS << " switch (F->getIntrinsicID()) {\n";
+ OS << " default: BuiltinName = \"\"; break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (!Ints[i].GCCBuiltinName.empty()) {
+ OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
+ << Ints[i].GCCBuiltinName << "\"; break;\n";
+ }
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
+ BIMTy BuiltinMap;
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (!Ints[i].GCCBuiltinName.empty()) {
+ std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
+ Ints[i].TargetPrefix);
+ if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
+ throw "Intrinsic '" + Ints[i].TheDef->getName() +
+ "': duplicate GCC builtin name!";
+ }
+ }
+
+ OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
+ OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
+ OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
+ OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
+ OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
+ OS << " if (0);\n";
+ // Note: this could emit significantly better code if we cared.
+ for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
+ OS << " else if (";
+ if (!I->first.second.empty()) {
+ // Emit this as a strcmp, so it can be constant folded by the FE.
+ OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
+ << " ";
+ }
+ OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
+ OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
+ }
+ OS << " else\n";
+ OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
+ OS << "#endif\n\n";
+}
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