[llvm] [RISCV][TTI] Use processShuffleMask for shuffle legalization estimate (PR #136191)
via llvm-commits
llvm-commits at lists.llvm.org
Thu Apr 17 13:16:12 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-transforms
@llvm/pr-subscribers-backend-risc-v
Author: Philip Reames (preames)
<details>
<summary>Changes</summary>
We had some code which tried to estimate legalization costs for illegally typed shuffles, but only handle the case of a widening shuffle, and used a somewhat adhoc heuristic. We can reuse the processShuffleMask utility (which we already use for individual vector register splitting when exact VLEN is known) to perform the same splitting given the legal vector type as the unit of split instead. This makes the costing both simpler and more robust.
Note that this swings costs for illegal shuffles pretty wildly as we were previously sometimes hitting the adhoc code, and sometimes falling through into generic scalarization costing. I don't know that any of the costs for the individual tests in tree are significant, but the test which which triggered me finding this was reported to me by Alexey reduced from something triggering a bad choice in SLP for x264. So this has the potential to be somewhat high impact.
---
Patch is 142.51 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/136191.diff
4 Files Affected:
- (modified) llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp (+61-41)
- (modified) llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll (+145-270)
- (modified) llvm/test/Analysis/CostModel/RISCV/shuffle-permute.ll (+12-12)
- (modified) llvm/test/Transforms/SLPVectorizer/RISCV/reductions.ll (+15-51)
``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index 9b91de36a688a..39b571c358460 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -383,6 +383,61 @@ static VectorType *getVRGatherIndexType(MVT DataVT, const RISCVSubtarget &ST,
return cast<VectorType>(EVT(IndexVT).getTypeForEVT(C));
}
+/// Attempt to approximate the cost of a shuffle which will require splitting
+/// during legalization. Note that processShuffleMasks is not an exact proxy
+/// for the algorithm used in LegalizeVectorTypes, but hopefull it's a
+/// reasonably close upperbound.
+static InstructionCost costShuffleViaSplitting(RISCVTTIImpl &TTI, MVT LegalVT,
+ VectorType *Tp,
+ ArrayRef<int> Mask,
+ TTI::TargetCostKind CostKind) {
+ assert(LegalVT.isFixedLengthVector() && !Mask.empty());
+ unsigned LegalNumElts = LegalVT.getVectorNumElements();
+ // Number of destination vectors after legalization:
+ unsigned NumOfDests = divideCeil(Mask.size(), LegalNumElts);
+ // We are going to permute multiple sources and the result will be in
+ // multiple destinations. Providing an accurate cost only for splits where
+ // the element type remains the same.
+ if (NumOfDests <= 1 ||
+ LegalVT.getVectorElementType().getSizeInBits() !=
+ Tp->getElementType()->getPrimitiveSizeInBits() ||
+ LegalNumElts >= Tp->getElementCount().getFixedValue())
+ return InstructionCost::getInvalid();
+
+ unsigned VecTySize = TTI.getDataLayout().getTypeStoreSize(Tp);
+ unsigned LegalVTSize = LegalVT.getStoreSize();
+ // Number of source vectors after legalization:
+ unsigned NumOfSrcs = divideCeil(VecTySize, LegalVTSize);
+
+ auto *SingleOpTy = FixedVectorType::get(Tp->getElementType(), LegalNumElts);
+
+ unsigned NormalizedVF = LegalNumElts * std::max(NumOfSrcs, NumOfDests);
+ unsigned NumOfSrcRegs = NormalizedVF / LegalNumElts;
+ unsigned NumOfDestRegs = NormalizedVF / LegalNumElts;
+ SmallVector<int> NormalizedMask(NormalizedVF, PoisonMaskElem);
+ assert(NormalizedVF >= Mask.size() &&
+ "Normalized mask expected to be not shorter than original mask.");
+ copy(Mask, NormalizedMask.begin());
+ InstructionCost Cost = 0;
+ SmallDenseSet<std::pair<ArrayRef<int>, unsigned>> ReusedSingleSrcShuffles;
+ processShuffleMasks(
+ NormalizedMask, NumOfSrcRegs, NumOfDestRegs, NumOfDestRegs, []() {},
+ [&](ArrayRef<int> RegMask, unsigned SrcReg, unsigned DestReg) {
+ if (ShuffleVectorInst::isIdentityMask(RegMask, RegMask.size()))
+ return;
+ if (!ReusedSingleSrcShuffles.insert(std::make_pair(RegMask, SrcReg))
+ .second)
+ return;
+ Cost += TTI.getShuffleCost(TTI::SK_PermuteSingleSrc, SingleOpTy,
+ RegMask, CostKind, 0, nullptr);
+ },
+ [&](ArrayRef<int> RegMask, unsigned Idx1, unsigned Idx2, bool NewReg) {
+ Cost += TTI.getShuffleCost(TTI::SK_PermuteTwoSrc, SingleOpTy, RegMask,
+ CostKind, 0, nullptr);
+ });
+ return Cost;
+}
+
/// Try to perform better estimation of the permutation.
/// 1. Split the source/destination vectors into real registers.
/// 2. Do the mask analysis to identify which real registers are
@@ -645,48 +700,13 @@ InstructionCost RISCVTTIImpl::getShuffleCost(TTI::ShuffleKind Kind,
return true;
}
};
- // We are going to permute multiple sources and the result will be in
- // multiple destinations. Providing an accurate cost only for splits where
- // the element type remains the same.
+
if (!Mask.empty() && LT.first.isValid() && LT.first != 1 &&
- shouldSplit(Kind) &&
- LT.second.getVectorElementType().getSizeInBits() ==
- Tp->getElementType()->getPrimitiveSizeInBits() &&
- LT.second.getVectorNumElements() <
- cast<FixedVectorType>(Tp)->getNumElements() &&
- divideCeil(Mask.size(),
- cast<FixedVectorType>(Tp)->getNumElements()) ==
- static_cast<unsigned>(*LT.first.getValue())) {
- unsigned NumRegs = *LT.first.getValue();
- unsigned VF = cast<FixedVectorType>(Tp)->getNumElements();
- unsigned SubVF = PowerOf2Ceil(VF / NumRegs);
- auto *SubVecTy = FixedVectorType::get(Tp->getElementType(), SubVF);
-
- InstructionCost Cost = 0;
- for (unsigned I = 0, NumSrcRegs = divideCeil(Mask.size(), SubVF);
- I < NumSrcRegs; ++I) {
- bool IsSingleVector = true;
- SmallVector<int> SubMask(SubVF, PoisonMaskElem);
- transform(
- Mask.slice(I * SubVF,
- I == NumSrcRegs - 1 ? Mask.size() % SubVF : SubVF),
- SubMask.begin(), [&](int I) -> int {
- if (I == PoisonMaskElem)
- return PoisonMaskElem;
- bool SingleSubVector = I / VF == 0;
- IsSingleVector &= SingleSubVector;
- return (SingleSubVector ? 0 : 1) * SubVF + (I % VF) % SubVF;
- });
- if (all_of(enumerate(SubMask), [](auto &&P) {
- return P.value() == PoisonMaskElem ||
- static_cast<unsigned>(P.value()) == P.index();
- }))
- continue;
- Cost += getShuffleCost(IsSingleVector ? TTI::SK_PermuteSingleSrc
- : TTI::SK_PermuteTwoSrc,
- SubVecTy, SubMask, CostKind, 0, nullptr);
- }
- return Cost;
+ shouldSplit(Kind)) {
+ InstructionCost SplitCost =
+ costShuffleViaSplitting(*this, LT.second, FVTp, Mask, CostKind);
+ if (SplitCost.isValid())
+ return SplitCost;
}
}
diff --git a/llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll b/llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll
index 23d5999237e30..b73abbfeba084 100644
--- a/llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll
+++ b/llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll
@@ -6,11 +6,11 @@
define <64 x i32> @interleave_v32i32(<32 x i32> %x, <32 x i32> %y) vscale_range(2,2) {
; CHECK-LABEL: 'interleave_v32i32'
-; CHECK-NEXT: Cost Model: Found an estimated cost of 224 for instruction: %a = shufflevector <32 x i32> %x, <32 x i32> %y, <64 x i32> <i32 0, i32 32, i32 1, i32 33, i32 2, i32 34, i32 3, i32 35, i32 4, i32 36, i32 5, i32 37, i32 6, i32 38, i32 7, i32 39, i32 8, i32 40, i32 9, i32 41, i32 10, i32 42, i32 11, i32 43, i32 12, i32 44, i32 13, i32 45, i32 14, i32 46, i32 15, i32 47, i32 16, i32 48, i32 17, i32 49, i32 18, i32 50, i32 19, i32 51, i32 20, i32 52, i32 21, i32 53, i32 22, i32 54, i32 23, i32 55, i32 24, i32 56, i32 25, i32 57, i32 26, i32 58, i32 27, i32 59, i32 28, i32 60, i32 29, i32 61, i32 30, i32 62, i32 31, i32 63>
+; CHECK-NEXT: Cost Model: Found an estimated cost of 302 for instruction: %a = shufflevector <32 x i32> %x, <32 x i32> %y, <64 x i32> <i32 0, i32 32, i32 1, i32 33, i32 2, i32 34, i32 3, i32 35, i32 4, i32 36, i32 5, i32 37, i32 6, i32 38, i32 7, i32 39, i32 8, i32 40, i32 9, i32 41, i32 10, i32 42, i32 11, i32 43, i32 12, i32 44, i32 13, i32 45, i32 14, i32 46, i32 15, i32 47, i32 16, i32 48, i32 17, i32 49, i32 18, i32 50, i32 19, i32 51, i32 20, i32 52, i32 21, i32 53, i32 22, i32 54, i32 23, i32 55, i32 24, i32 56, i32 25, i32 57, i32 26, i32 58, i32 27, i32 59, i32 28, i32 60, i32 29, i32 61, i32 30, i32 62, i32 31, i32 63>
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <64 x i32> %a
;
; CHECK-SIZE-LABEL: 'interleave_v32i32'
-; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 224 for instruction: %a = shufflevector <32 x i32> %x, <32 x i32> %y, <64 x i32> <i32 0, i32 32, i32 1, i32 33, i32 2, i32 34, i32 3, i32 35, i32 4, i32 36, i32 5, i32 37, i32 6, i32 38, i32 7, i32 39, i32 8, i32 40, i32 9, i32 41, i32 10, i32 42, i32 11, i32 43, i32 12, i32 44, i32 13, i32 45, i32 14, i32 46, i32 15, i32 47, i32 16, i32 48, i32 17, i32 49, i32 18, i32 50, i32 19, i32 51, i32 20, i32 52, i32 21, i32 53, i32 22, i32 54, i32 23, i32 55, i32 24, i32 56, i32 25, i32 57, i32 26, i32 58, i32 27, i32 59, i32 28, i32 60, i32 29, i32 61, i32 30, i32 62, i32 31, i32 63>
+; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 22 for instruction: %a = shufflevector <32 x i32> %x, <32 x i32> %y, <64 x i32> <i32 0, i32 32, i32 1, i32 33, i32 2, i32 34, i32 3, i32 35, i32 4, i32 36, i32 5, i32 37, i32 6, i32 38, i32 7, i32 39, i32 8, i32 40, i32 9, i32 41, i32 10, i32 42, i32 11, i32 43, i32 12, i32 44, i32 13, i32 45, i32 14, i32 46, i32 15, i32 47, i32 16, i32 48, i32 17, i32 49, i32 18, i32 50, i32 19, i32 51, i32 20, i32 52, i32 21, i32 53, i32 22, i32 54, i32 23, i32 55, i32 24, i32 56, i32 25, i32 57, i32 26, i32 58, i32 27, i32 59, i32 28, i32 60, i32 29, i32 61, i32 30, i32 62, i32 31, i32 63>
; CHECK-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: ret <64 x i32> %a
;
%a = shufflevector <32 x i32> %x, <32 x i32> %y, <64 x i32> <i32 0, i32 32, i32 1, i32 33, i32 2, i32 34, i32 3, i32 35, i32 4, i32 36, i32 5, i32 37, i32 6, i32 38, i32 7, i32 39, i32 8, i32 40, i32 9, i32 41, i32 10, i32 42, i32 11, i32 43, i32 12, i32 44, i32 13, i32 45, i32 14, i32 46, i32 15, i32 47, i32 16, i32 48, i32 17, i32 49, i32 18, i32 50, i32 19, i32 51, i32 20, i32 52, i32 21, i32 53, i32 22, i32 54, i32 23, i32 55, i32 24, i32 56, i32 25, i32 57, i32 26, i32 58, i32 27, i32 59, i32 28, i32 60, i32 29, i32 61, i32 30, i32 62, i32 31, i32 63>
@@ -319,7 +319,7 @@ define void @shuffle1() vscale_range(2,2) {
; RV32-NEXT: Cost Model: Found an estimated cost of 68 for instruction: %zipv8i64 = shufflevector <8 x i64> poison, <8 x i64> poison, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
; RV32-NEXT: Cost Model: Found an estimated cost of 139 for instruction: %zip1v16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <16 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23>
; RV32-NEXT: Cost Model: Found an estimated cost of 139 for instruction: %zip2v16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <16 x i32> <i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV32-NEXT: Cost Model: Found an estimated cost of 256 for instruction: %zipv16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
+; RV32-NEXT: Cost Model: Found an estimated cost of 278 for instruction: %zipv16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
; RV32-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
; RV64-LABEL: 'shuffle1'
@@ -370,110 +370,59 @@ define void @shuffle1() vscale_range(2,2) {
; RV64-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %zipv8i64 = shufflevector <8 x i64> poison, <8 x i64> poison, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
; RV64-NEXT: Cost Model: Found an estimated cost of 151 for instruction: %zip1v16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <16 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23>
; RV64-NEXT: Cost Model: Found an estimated cost of 151 for instruction: %zip2v16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <16 x i32> <i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV64-NEXT: Cost Model: Found an estimated cost of 96 for instruction: %zipv16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
+; RV64-NEXT: Cost Model: Found an estimated cost of 302 for instruction: %zipv16i64 = shufflevector <16 x i64> poison, <16 x i64> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
; RV64-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
-; RV32-SIZE-LABEL: 'shuffle1'
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v2i8 = shufflevector <2 x i8> poison, <2 x i8> poison, <2 x i32> <i32 0, i32 2>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v2i8 = shufflevector <2 x i8> poison, <2 x i8> poison, <2 x i32> <i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv2i8 = shufflevector <2 x i8> poison, <2 x i8> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v4i8 = shufflevector <4 x i8> poison, <4 x i8> poison, <4 x i32> <i32 0, i32 4, i32 1, i32 5>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v4i8 = shufflevector <4 x i8> poison, <4 x i8> poison, <4 x i32> <i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv4i8 = shufflevector <4 x i8> poison, <4 x i8> poison, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v8i8 = shufflevector <8 x i8> poison, <8 x i8> poison, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v8i8 = shufflevector <8 x i8> poison, <8 x i8> poison, <8 x i32> <i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv8i8 = shufflevector <8 x i8> poison, <8 x i8> poison, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v16i8 = shufflevector <16 x i8> poison, <16 x i8> poison, <16 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v16i8 = shufflevector <16 x i8> poison, <16 x i8> poison, <16 x i32> <i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv16i8 = shufflevector <16 x i8> poison, <16 x i8> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v2i16 = shufflevector <2 x i16> poison, <2 x i16> poison, <2 x i32> <i32 0, i32 2>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v2i16 = shufflevector <2 x i16> poison, <2 x i16> poison, <2 x i32> <i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv2i16 = shufflevector <2 x i16> poison, <2 x i16> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v4i16 = shufflevector <4 x i16> poison, <4 x i16> poison, <4 x i32> <i32 0, i32 4, i32 1, i32 5>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v4i16 = shufflevector <4 x i16> poison, <4 x i16> poison, <4 x i32> <i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv4i16 = shufflevector <4 x i16> poison, <4 x i16> poison, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v8i16 = shufflevector <8 x i16> poison, <8 x i16> poison, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v8i16 = shufflevector <8 x i16> poison, <8 x i16> poison, <8 x i32> <i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv8i16 = shufflevector <8 x i16> poison, <8 x i16> poison, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v16i16 = shufflevector <16 x i16> poison, <16 x i16> poison, <16 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v16i16 = shufflevector <16 x i16> poison, <16 x i16> poison, <16 x i32> <i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv16i16 = shufflevector <16 x i16> poison, <16 x i16> poison, <32 x i32> <i32 0, i32 16, i32 1, i32 17, i32 2, i32 18, i32 3, i32 19, i32 4, i32 20, i32 5, i32 21, i32 6, i32 22, i32 7, i32 23, i32 8, i32 24, i32 9, i32 25, i32 10, i32 26, i32 11, i32 27, i32 12, i32 28, i32 13, i32 29, i32 14, i32 30, i32 15, i32 31>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v2i32 = shufflevector <2 x i32> poison, <2 x i32> poison, <2 x i32> <i32 0, i32 2>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v2i32 = shufflevector <2 x i32> poison, <2 x i32> poison, <2 x i32> <i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv2i32 = shufflevector <2 x i32> poison, <2 x i32> poison, <4 x i32> <i32 0, i32 2, i32 1, i32 3>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v4i32 = shufflevector <4 x i32> poison, <4 x i32> poison, <4 x i32> <i32 0, i32 4, i32 1, i32 5>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v4i32 = shufflevector <4 x i32> poison, <4 x i32> poison, <4 x i32> <i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv4i32 = shufflevector <4 x i32> poison, <4 x i32> poison, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip1v8i32 = shufflevector <8 x i32> poison, <8 x i32> poison, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %zip2v8i32 = shufflevector <8 x i32> poison, <8 x i32> poison, <8 x i32> <i32 4, i32 12, i32 5, i32 13, i32 6, i32 14, i32 7, i32 15>
-; RV32-SIZE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %zipv8i32 = shufflevector <8 x i32> poison, <8 x i32> poison, <16 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11, i32 4, i32 12, i3...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/136191
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