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For PR1297:

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Implement code generation for overloaded intrinsic functions. The basic
difference is that "actual" argument types must be provided when
constructing intrinsic names and types. Also, for recognition, only the
prefix is examined. If it matches, the suffix is assumed to match. The
suffix is checked by the Verifier, however.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-04-01 07:20:02 +00:00
parent 86a5a368f8
commit c4de3dec62
3 changed files with 35 additions and 17 deletions
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6
utils/TableGen/CodeGenIntrinsics.h
View File

@ -24,7 +24,7 @@ namespace llvm {
class CodeGenTarget;
struct CodeGenIntrinsic {
Record *TheDef; // The actual record defining this instruction.
Record *TheDef; // The actual record defining this intrinsic.
std::string Name; // The name of the LLVM function "llvm.bswap.i32"
std::string EnumName; // The name of the enum "bswap_i32"
std::string GCCBuiltinName;// Name of the corresponding GCC builtin, or "".
@ -49,6 +49,10 @@ namespace llvm {
NoMem, ReadArgMem, ReadMem, WriteArgMem, WriteMem
} ModRef;
// This is set to true if the intrinsic is overloaded by its argument
// types.
bool isOverloaded;
CodeGenIntrinsic(Record *R, CodeGenTarget *CGT);
};

10
utils/TableGen/CodeGenTarget.cpp
View File

@ -43,6 +43,7 @@ std::string llvm::getName(MVT::ValueType T) {
case MVT::i32: return "MVT::i32";
case MVT::i64: return "MVT::i64";
case MVT::i128: return "MVT::i128";
case MVT::iAny: return "MVT::iAny";
case MVT::f32: return "MVT::f32";
case MVT::f64: return "MVT::f64";
case MVT::f80: return "MVT::f80";
@ -74,6 +75,7 @@ std::string llvm::getEnumName(MVT::ValueType T) {
case MVT::i32: return "MVT::i32";
case MVT::i64: return "MVT::i64";
case MVT::i128: return "MVT::i128";
case MVT::iAny: return "MVT::iAny";
case MVT::f32: return "MVT::f32";
case MVT::f64: return "MVT::f64";
case MVT::f80: return "MVT::f80";
@ -570,6 +572,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R, CodeGenTarget *CGT) {
TheDef = R;
std::string DefName = R->getName();
ModRef = WriteMem;
isOverloaded = false;
if (DefName.size() <= 4 ||
std::string(DefName.begin(), DefName.begin()+4) != "int_")
@ -610,13 +613,14 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R, CodeGenTarget *CGT) {
Record *TyEl = TypeList->getElementAsRecord(i);
assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
ArgTypes.push_back(TyEl->getValueAsString("TypeVal"));
if (CGT)
ArgVTs.push_back(getValueType(TyEl->getValueAsDef("VT"), CGT));
MVT::ValueType VT = getValueType(TyEl->getValueAsDef("VT"), CGT);
isOverloaded |= VT == MVT::iAny;
ArgVTs.push_back(VT);
ArgTypeDefs.push_back(TyEl);
}
if (ArgTypes.size() == 0)
throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
// Parse the intrinsic properties.
ListInit *PropList = R->getValueAsListInit("Properties");

36
utils/TableGen/IntrinsicEmitter.cpp
View File

@ -74,9 +74,9 @@ 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;
std::map<std::string, unsigned> IntMapping;
for (unsigned i = 0, e = Ints.size(); i != e; ++i)
IntMapping[Ints[i].Name] = Ints[i].EnumName;
IntMapping[Ints[i].Name] = i;
OS << "// Function name -> enum value recognizer code.\n";
OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
@ -84,7 +84,7 @@ EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
OS << " default:\n";
// Emit the intrinsics in sorted order.
char LastChar = 0;
for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
for (std::map<std::string, unsigned>::iterator I = IntMapping.begin(),
E = IntMapping.end(); I != E; ++I) {
if (I->first[5] != LastChar) {
LastChar = I->first[5];
@ -92,9 +92,15 @@ EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
OS << " case '" << LastChar << "':\n";
}
OS << " if (Len == " << I->first.size()
<< " && !memcmp(Name, \"" << I->first << "\", Len)) return Intrinsic::"
<< I->second << ";\n";
// For overloaded intrinsics, only the prefix needs to match
if (Ints[I->second].isOverloaded)
OS << " if (Len >= " << I->first.size()
<< " && !memcmp(Name, \"" << I->first << "\", " << I->first.size()
<< ")) return Intrinsic::" << Ints[I->second].EnumName << ";\n";
else
OS << " if (Len == " << I->first.size()
<< " && !memcmp(Name, \"" << I->first << "\", Len)) return Intrinsic::"
<< Ints[I->second].EnumName << ";\n";
}
OS << " }\n";
OS << " // The 'llvm.' namespace is reserved!\n";
@ -130,16 +136,20 @@ static bool EmitTypeVerify(std::ostream &OS, Record *ArgType) {
return false;
}
static void EmitTypeGenerate(std::ostream &OS, Record *ArgType) {
static void EmitTypeGenerate(std::ostream &OS, Record *ArgType, unsigned ArgNo){
if (ArgType->isSubClassOf("LLVMIntegerType")) {
OS << "IntegerType::get(" << ArgType->getValueAsInt("Width") << ")";
unsigned BitWidth = ArgType->getValueAsInt("Width");
if (BitWidth == 0)
OS << "Tys[" << ArgNo << "]";
else
OS << "IntegerType::get(" << BitWidth << ")";
} else if (ArgType->isSubClassOf("LLVMVectorType")) {
OS << "VectorType::get(";
EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"));
EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
OS << ", " << ArgType->getValueAsInt("NumElts") << ")";
} else if (ArgType->isSubClassOf("LLVMPointerType")) {
OS << "PointerType::get(";
EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"));
EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
OS << ")";
} else if (ArgType->isSubClassOf("LLVMEmptyStructType")) {
OS << "StructType::get(std::vector<const Type *>())";
@ -194,7 +204,7 @@ void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
}
const std::vector<Record*> &ArgTypes = I->first;
OS << " VerifyIntrinsicPrototype(IF, ";
OS << " VerifyIntrinsicPrototype(ID, IF, ";
bool VarArg = false;
for (unsigned j = 0; j != ArgTypes.size(); ++j) {
VarArg = EmitTypeVerify(OS, ArgTypes[j]);
@ -246,12 +256,12 @@ void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
}
OS << " ResultTy = ";
EmitTypeGenerate(OS, ArgTypes[0]);
EmitTypeGenerate(OS, ArgTypes[0], 0);
OS << ";\n";
for (unsigned j = 1; j != N; ++j) {
OS << " ArgTys.push_back(";
EmitTypeGenerate(OS, ArgTypes[j]);
EmitTypeGenerate(OS, ArgTypes[j], j);
OS << ");\n";
}