kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, SjoerdMeijer, greened.
Herald added subscribers: jdoerfert, tschuett.
Herald added a project: LLVM.
Both match the type of another intrinsic parameter of a vector type, but where
each element is subdivided to form a vector with more elements of a smaller
type.
Subdivide2Argument allows intrinsics such as the following to be defined:
- declare <vscale x 4 x i32> @llvm.something.nxv4i32(<vscale x 8 x i16>)
Subdivide4Argument allows intrinsics such as:
- declare <vscale x 4 x i32> @llvm.something.nxv4i32(<vscale x 16 x i8>)
Tests are included in follow up patches which add intrinsics using these types.
Repository:
rL LLVM
https://reviews.llvm.org/D67549
Files:
include/llvm/IR/DerivedTypes.h
include/llvm/IR/Intrinsics.h
include/llvm/IR/Intrinsics.td
lib/IR/Function.cpp
utils/TableGen/IntrinsicEmitter.cpp
Index: utils/TableGen/IntrinsicEmitter.cpp
===================================================================
--- utils/TableGen/IntrinsicEmitter.cpp
+++ utils/TableGen/IntrinsicEmitter.cpp
@@ -221,7 +221,9 @@
IIT_STRUCT8 = 40,
IIT_F128 = 41,
IIT_VEC_ELEMENT = 42,
- IIT_SCALABLE_VEC = 43
+ IIT_SCALABLE_VEC = 43,
+ IIT_SUBDIVIDE2_ARG = 44,
+ IIT_SUBDIVIDE4_ARG = 45
};
static void EncodeFixedValueType(MVT::SimpleValueType VT,
@@ -293,6 +295,10 @@
Sig.push_back(IIT_PTR_TO_ELT);
else if (R->isSubClassOf("LLVMVectorElementType"))
Sig.push_back(IIT_VEC_ELEMENT);
+ else if (R->isSubClassOf("LLVMSubdivide2VectorType"))
+ Sig.push_back(IIT_SUBDIVIDE2_ARG);
+ else if (R->isSubClassOf("LLVMSubdivide4VectorType"))
+ Sig.push_back(IIT_SUBDIVIDE4_ARG);
else
Sig.push_back(IIT_ARG);
return Sig.push_back((Number << 3) | 7 /*IITDescriptor::AK_MatchType*/);
Index: lib/IR/Function.cpp
===================================================================
--- lib/IR/Function.cpp
+++ lib/IR/Function.cpp
@@ -703,7 +703,9 @@
IIT_STRUCT8 = 40,
IIT_F128 = 41,
IIT_VEC_ELEMENT = 42,
- IIT_SCALABLE_VEC = 43
+ IIT_SCALABLE_VEC = 43,
+ IIT_SUBDIVIDE2_ARG = 44,
+ IIT_SUBDIVIDE4_ARG = 45
};
static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
@@ -868,6 +870,18 @@
DecodeIITType(NextElt, Infos, OutputTable);
return;
}
+ case IIT_SUBDIVIDE2_ARG: {
+ unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Subdivide2Argument,
+ ArgInfo));
+ return;
+ }
+ case IIT_SUBDIVIDE4_ARG: {
+ unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
+ OutputTable.push_back(IITDescriptor::get(IITDescriptor::Subdivide4Argument,
+ ArgInfo));
+ return;
+ }
case IIT_VEC_ELEMENT: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::VecElementArgument,
@@ -970,6 +984,18 @@
assert(ITy->getBitWidth() % 2 == 0);
return IntegerType::get(Context, ITy->getBitWidth() / 2);
}
+ case IITDescriptor::Subdivide2Argument: {
+ Type *Ty = Tys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(Ty))
+ return VectorType::getSubdividedVectorType(VTy, 1);
+ llvm_unreachable("unhandled");
+ }
+ case IITDescriptor::Subdivide4Argument: {
+ Type *Ty = Tys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(Ty))
+ return VectorType::getSubdividedVectorType(VTy, 2);
+ llvm_unreachable("unhandled");
+ }
case IITDescriptor::HalfVecArgument:
return VectorType::getHalfElementsVectorType(cast<VectorType>(
Tys[D.getArgumentNumber()]));
@@ -1269,6 +1295,32 @@
auto *ReferenceType = dyn_cast<VectorType>(ArgTys[D.getArgumentNumber()]);
return !ReferenceType || Ty != ReferenceType->getElementType();
}
+ case IITDescriptor::Subdivide2Argument: {
+ // This may only be used when referring to a previous vector argument.
+ if (D.getArgumentNumber() >= ArgTys.size())
+ return IsDeferredCheck || DeferCheck(Ty);
+
+ Type *NewTy = ArgTys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
+ NewTy = VectorType::getSubdividedVectorType(VTy, 1);
+ else
+ return true;
+
+ return Ty != NewTy;
+ }
+ case IITDescriptor::Subdivide4Argument: {
+ // This may only be used when referring to a previous vector argument.
+ if (D.getArgumentNumber() >= ArgTys.size())
+ return IsDeferredCheck || DeferCheck(Ty);
+
+ Type *NewTy = ArgTys[D.getArgumentNumber()];
+ if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
+ NewTy = VectorType::getSubdividedVectorType(VTy, 2);
+ else
+ return true;
+
+ return Ty != NewTy;
+ }
case IITDescriptor::ScalableVecArgument: {
VectorType *VTy = dyn_cast<VectorType>(Ty);
if (!VTy || !VTy->isScalable())
Index: include/llvm/IR/Intrinsics.td
===================================================================
--- include/llvm/IR/Intrinsics.td
+++ include/llvm/IR/Intrinsics.td
@@ -187,6 +187,12 @@
// vector type, but change the element count to be half as many
class LLVMHalfElementsVectorType<int num> : LLVMMatchType<num>;
+// Match the type of another intrinsic parameter that is expected to be a
+// vector type (i.e. <N x iM>) but with each element subdivided to
+// form a vector with more elements that are smaller than the original.
+class LLVMSubdivide2VectorType<int num> : LLVMMatchType<num>;
+class LLVMSubdivide4VectorType<int num> : LLVMMatchType<num>;
+
def llvm_void_ty : LLVMType<isVoid>;
let isAny = 1 in {
def llvm_any_ty : LLVMType<Any>;
Index: include/llvm/IR/Intrinsics.h
===================================================================
--- include/llvm/IR/Intrinsics.h
+++ include/llvm/IR/Intrinsics.h
@@ -100,7 +100,8 @@
Integer, Vector, Pointer, Struct,
Argument, ExtendArgument, TruncArgument, HalfVecArgument,
SameVecWidthArgument, PtrToArgument, PtrToElt, VecOfAnyPtrsToElt,
- VecElementArgument, ScalableVecArgument
+ VecElementArgument, ScalableVecArgument, Subdivide2Argument,
+ Subdivide4Argument
} Kind;
union {
@@ -125,14 +126,16 @@
assert(Kind == Argument || Kind == ExtendArgument ||
Kind == TruncArgument || Kind == HalfVecArgument ||
Kind == SameVecWidthArgument || Kind == PtrToArgument ||
- Kind == PtrToElt || Kind == VecElementArgument);
+ Kind == PtrToElt || Kind == VecElementArgument ||
+ Kind == Subdivide2Argument || Kind == Subdivide4Argument);
return Argument_Info >> 3;
}
ArgKind getArgumentKind() const {
assert(Kind == Argument || Kind == ExtendArgument ||
Kind == TruncArgument || Kind == HalfVecArgument ||
Kind == SameVecWidthArgument || Kind == PtrToArgument ||
- Kind == VecElementArgument);
+ Kind == VecElementArgument || Kind == Subdivide2Argument ||
+ Kind == Subdivide4Argument);
return (ArgKind)(Argument_Info & 7);
}
Index: include/llvm/IR/DerivedTypes.h
===================================================================
--- include/llvm/IR/DerivedTypes.h
+++ include/llvm/IR/DerivedTypes.h
@@ -485,6 +485,38 @@
return VectorType::get(EltTy, VTy->getElementCount());
}
+ /// This static method is like getInteger except that the element types are
+ /// half as wide as the elements in the input type.
+ static VectorType *getNarrowerFpElementVectorType(VectorType *VTy) {
+ Type *EltTy;
+ switch(VTy->getElementType()->getTypeID()) {
+ case DoubleTyID:
+ EltTy = Type::getFloatTy(VTy->getContext());
+ break;
+ case FloatTyID:
+ EltTy = Type::getHalfTy(VTy->getContext());
+ break;
+ default:
+ assert(0 && "Cannot create narrower fp vector element type");
+ break;
+ }
+ return VectorType::get(EltTy, VTy->getElementCount());
+ }
+
+ // This static method returns a VectorType with a smaller number of elements
+ // of a larger type than the input element type. For example, a <16 x i8>
+ // subdivided twice would return <4 x i32>
+ static VectorType *getSubdividedVectorType(VectorType *VTy, int NumSubdivs) {
+ for (int i = 0; i < NumSubdivs; ++i) {
+ VTy = VectorType::getDoubleElementsVectorType(VTy);
+ if (VTy->getElementType()->isFloatingPointTy())
+ VTy = VectorType::getNarrowerFpElementVectorType(VTy);
+ else
+ VTy = VectorType::getTruncatedElementVectorType(VTy);
+ }
+ return VTy;
+ }
+
/// This static method returns a VectorType with half as many elements as the
/// input type and the same element type.
static VectorType *getHalfElementsVectorType(VectorType *VTy) {
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