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[RISCV][TTI] Implement instruction cost for vp.splice. #124221

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Feb 4, 2025
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[RISCV][TTI] Implement instruction cost for vp.splice. #124221

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a8f6b66
Precommit test case for vp.splice.
ElvisWang123 Jan 24, 2025
3a63c4d
[RISCV][TTI] Implement cost for vp.splice.
ElvisWang123 Jan 24, 2025
1befad1
Using poison to replace undef
ElvisWang123 Jan 24, 2025
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8 changes: 8 additions & 0 deletions llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1235,6 +1235,14 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
: RISCV::VMV_V_X,
LT.second, CostKind);
}
case Intrinsic::experimental_vp_splice: {
// To support type-based query from vectorizer, set the index to 0.
// Note that index only change the cost from vslide.vx to vslide.vi and in
// current implementations they have same costs.
return getShuffleCost(TTI::SK_Splice,
cast<VectorType>(ICA.getArgTypes()[0]), {}, CostKind,
0, cast<VectorType>(ICA.getReturnType()));
}
}

if (ST->hasVInstructions() && RetTy->isVectorTy()) {
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52 changes: 52 additions & 0 deletions llvm/test/Analysis/CostModel/RISCV/vp-intrinsics.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -2351,6 +2351,58 @@ define void @splat() {
ret void
}

define void @splice() {
; CHECK-LABEL: 'splice'
; CHECK-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vp.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vp.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1, <vscale x 32 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vp.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vp.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vp.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vp.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vp.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vp.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vp.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vp.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv16i1 = call <vscale x 16 x i1> @llvm.experimental.vp.splice.nxv16i1(<vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv8i1 = call <vscale x 8 x i1> @llvm.experimental.vp.splice.nxv8i1(<vscale x 8 x i1> zeroinitializer, <vscale x 8 x i1> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i1 = call <vscale x 4 x i1> @llvm.experimental.vp.splice.nxv4i1(<vscale x 4 x i1> zeroinitializer, <vscale x 4 x i1> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i1 = call <vscale x 2 x i1> @llvm.experimental.vp.splice.nxv2i1(<vscale x 2 x i1> zeroinitializer, <vscale x 2 x i1> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
; TYPEBASED-LABEL: 'splice'
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vp.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vp.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1, <vscale x 32 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vp.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vp.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vp.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vp.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vp.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vp.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vp.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %splice_nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vp.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %splice_nxv16i1 = call <vscale x 16 x i1> @llvm.experimental.vp.splice.nxv16i1(<vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv8i1 = call <vscale x 8 x i1> @llvm.experimental.vp.splice.nxv8i1(<vscale x 8 x i1> zeroinitializer, <vscale x 8 x i1> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i1 = call <vscale x 4 x i1> @llvm.experimental.vp.splice.nxv4i1(<vscale x 4 x i1> zeroinitializer, <vscale x 4 x i1> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i1 = call <vscale x 2 x i1> @llvm.experimental.vp.splice.nxv2i1(<vscale x 2 x i1> zeroinitializer, <vscale x 2 x i1> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
; TYPEBASED-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
%splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vp.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vp.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1, <vscale x 32 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vp.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vp.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vp.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vp.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vp.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vp.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vp.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vp.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv16i1 = call <vscale x 16 x i1> @llvm.experimental.vp.splice.nxv16i1(<vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1> zeroinitializer, i32 1, <vscale x 16 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv8i1 = call <vscale x 8 x i1> @llvm.experimental.vp.splice.nxv8i1(<vscale x 8 x i1> zeroinitializer, <vscale x 8 x i1> zeroinitializer, i32 1, <vscale x 8 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv4i1 = call <vscale x 4 x i1> @llvm.experimental.vp.splice.nxv4i1(<vscale x 4 x i1> zeroinitializer, <vscale x 4 x i1> zeroinitializer, i32 1, <vscale x 4 x i1> zeroinitializer, i32 poison, i32 poison)
%splice_nxv2i1 = call <vscale x 2 x i1> @llvm.experimental.vp.splice.nxv2i1(<vscale x 2 x i1> zeroinitializer, <vscale x 2 x i1> zeroinitializer, i32 1, <vscale x 2 x i1> zeroinitializer, i32 poison, i32 poison)
ret void
}

declare <2 x i8> @llvm.vp.add.v2i8(<2 x i8>, <2 x i8>, <2 x i1>, i32)
declare <4 x i8> @llvm.vp.add.v4i8(<4 x i8>, <4 x i8>, <4 x i1>, i32)
declare <8 x i8> @llvm.vp.add.v8i8(<8 x i8>, <8 x i8>, <8 x i1>, i32)
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