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Genericize the intrinsics descriptor decoding a bit to make room

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for future expansion, no functionality change yet though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156979 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2012-05-17 05:13:57 +00:00
parent d7cf5eb021
commit 626b108619
1 changed files with 25 additions and 20 deletions
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45
lib/VMCore/Function.cpp
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@ -361,14 +361,12 @@ std::string Intrinsic::getName(ID id, ArrayRef<Type*> Tys) {
#include "llvm/Intrinsics.gen"
#undef GET_INTRINSTIC_GENERATOR_GLOBAL
static Type *DecodeFixedType(unsigned &TableVal, ArrayRef<Type*> Tys,
LLVMContext &Context) {
unsigned Nibble = TableVal & 0xF;
TableVal >>= 4;
static Type *DecodeFixedType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
ArrayRef<Type*> Tys, LLVMContext &Context) {
IIT_Info Info = IIT_Info(Infos[NextElt++]);
unsigned StructElts = 2;
switch ((IIT_Info)Nibble) {
switch (Info) {
case IIT_Done: return Type::getVoidTy(Context);
case IIT_I1: return Type::getInt1Ty(Context);
case IIT_I8: return Type::getInt8Ty(Context);
@ -381,28 +379,27 @@ static Type *DecodeFixedType(unsigned &TableVal, ArrayRef<Type*> Tys,
case IIT_METADATA: return Type::Type::getMetadataTy(Context);
case IIT_EMPTYSTRUCT: return StructType::get(Context);
case IIT_V2:
return VectorType::get(DecodeFixedType(TableVal, Tys, Context), 2);
return VectorType::get(DecodeFixedType(NextElt, Infos, Tys, Context), 2);
case IIT_V4:
return VectorType::get(DecodeFixedType(TableVal, Tys, Context), 4);
return VectorType::get(DecodeFixedType(NextElt, Infos, Tys, Context), 4);
case IIT_V8:
return VectorType::get(DecodeFixedType(TableVal, Tys, Context), 8);
return VectorType::get(DecodeFixedType(NextElt, Infos, Tys, Context), 8);
case IIT_V16:
return VectorType::get(DecodeFixedType(TableVal, Tys, Context), 16);
return VectorType::get(DecodeFixedType(NextElt, Infos, Tys, Context), 16);
case IIT_V32:
return VectorType::get(DecodeFixedType(TableVal, Tys, Context), 32);
return VectorType::get(DecodeFixedType(NextElt, Infos, Tys, Context), 32);
case IIT_PTR:
return PointerType::getUnqual(DecodeFixedType(TableVal, Tys, Context));
return PointerType::getUnqual(DecodeFixedType(NextElt, Infos, Tys,Context));
case IIT_ARG:
case IIT_EXTEND_VEC_ARG:
case IIT_TRUNC_VEC_ARG: {
unsigned ArgNo = TableVal & 0xF;
TableVal >>= 4;
unsigned ArgNo = NextElt == Infos.size() ? 0 : Infos[NextElt++];
assert(ArgNo < Tys.size() && "Not enough types specified!");
Type *T = Tys[ArgNo];
if (Nibble == IIT_EXTEND_VEC_ARG)
if (Info == IIT_EXTEND_VEC_ARG)
T = VectorType::getExtendedElementVectorType(cast<VectorType>(T));
if (Nibble == IIT_TRUNC_VEC_ARG)
if (Info == IIT_TRUNC_VEC_ARG)
T = VectorType::getTruncatedElementVectorType(cast<VectorType>(T));
return T;
}
@ -412,7 +409,7 @@ static Type *DecodeFixedType(unsigned &TableVal, ArrayRef<Type*> Tys,
case IIT_STRUCT2: {
Type *Elts[5];
for (unsigned i = 0; i != StructElts; ++i)
Elts[i] = DecodeFixedType(TableVal, Tys, Context);
Elts[i] = DecodeFixedType(NextElt, Infos, Tys, Context);
return StructType::get(Context, ArrayRef<Type*>(Elts, StructElts));
}
}
@ -428,10 +425,18 @@ FunctionType *Intrinsic::getType(LLVMContext &Context,
// Check to see if the intrinsic's type was expressible by the table.
unsigned TableVal = IIT_Table[id-1];
if (TableVal != ~0U) {
ResultTy = DecodeFixedType(TableVal, Tys, Context);
// Decode the TableVal into an array of IITValues.
SmallVector<unsigned char, 8> IITValues;
do {
IITValues.push_back(TableVal & 0xF);
TableVal >>= 4;
} while (TableVal);
while (TableVal)
ArgTys.push_back(DecodeFixedType(TableVal, Tys, Context));
unsigned NextElt = 0;
ResultTy = DecodeFixedType(NextElt, IITValues, Tys, Context);
while (NextElt != IITValues.size())
ArgTys.push_back(DecodeFixedType(NextElt, IITValues, Tys, Context));
return FunctionType::get(ResultTy, ArgTys, false);
}