[llvm] [CostModel][X86] Attempt to match cheap v4f32 shuffles that map to SHUFPS instruction (PR #121778)
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llvm-commits at lists.llvm.org
Mon Jan 6 07:39:10 PST 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-analysis
Author: Simon Pilgrim (RKSimon)
<details>
<summary>Changes</summary>
Avoid always assuming the worst for v4f32 2 input shuffles, and match the SHUFPS pattern where possible - each pair of output elements must come from the same source register.
---
Patch is 159.92 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/121778.diff
14 Files Affected:
- (modified) llvm/lib/Target/X86/X86TargetTransformInfo.cpp (+10-1)
- (modified) llvm/test/Analysis/CostModel/X86/alternate-shuffle-cost.ll (+3-15)
- (modified) llvm/test/Analysis/CostModel/X86/reduction.ll (+8-8)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-codesize.ll (+32-94)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-latency.ll (+32-94)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-sizelatency.ll (+32-94)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector.ll (+32-94)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-splice-codesize.ll (+1-1)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-splice-latency.ll (+1-1)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-splice-sizelatency.ll (+1-1)
- (modified) llvm/test/Analysis/CostModel/X86/shuffle-splice.ll (+1-1)
- (modified) llvm/test/Transforms/PhaseOrdering/X86/hadd.ll (+13-31)
- (modified) llvm/test/Transforms/PhaseOrdering/X86/hsub.ll (+13-31)
- (modified) llvm/test/Transforms/VectorCombine/X86/shuffle-of-cmps.ll (+7-23)
``````````diff
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
index 5d07507457eec5..7a7554cdb99088 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -2226,9 +2226,18 @@ InstructionCost X86TTIImpl::getShuffleCost(
{ TTI::SK_PermuteTwoSrc, MVT::v4f32, 2 }, // 2*shufps
};
- if (ST->hasSSE1())
+ if (ST->hasSSE1()) {
+ if (LT.first == 1 && LT.second == MVT::v4f32 && Mask.size() == 4) {
+ // SHUFPS: both pairs must come from the same source register.
+ auto MatchSHUFPS = [](int X, int Y) {
+ return X < 0 || Y < 0 || ((X & 4) == (Y & 4));
+ };
+ if (MatchSHUFPS(Mask[0], Mask[1]) && MatchSHUFPS(Mask[2], Mask[3]))
+ return 1;
+ }
if (const auto *Entry = CostTableLookup(SSE1ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
+ }
return BaseT::getShuffleCost(Kind, BaseTp, Mask, CostKind, Index, SubTp);
}
diff --git a/llvm/test/Analysis/CostModel/X86/alternate-shuffle-cost.ll b/llvm/test/Analysis/CostModel/X86/alternate-shuffle-cost.ll
index 21a92c45591718..033537d93bf777 100644
--- a/llvm/test/Analysis/CostModel/X86/alternate-shuffle-cost.ll
+++ b/llvm/test/Analysis/CostModel/X86/alternate-shuffle-cost.ll
@@ -247,21 +247,9 @@ define <4 x float> @test_v4f32_2(<4 x float> %a, <4 x float> %b) {
}
define <4 x float> @test_v4f32_3(<4 x float> %a, <4 x float> %b) {
-; SSE2-LABEL: 'test_v4f32_3'
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <4 x float> %1
-;
-; SSSE3-LABEL: 'test_v4f32_3'
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <4 x float> %1
-;
-; SSE42-LABEL: 'test_v4f32_3'
-; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; SSE42-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <4 x float> %1
-;
-; AVX-LABEL: 'test_v4f32_3'
-; AVX-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; AVX-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <4 x float> %1
+; CHECK-LABEL: 'test_v4f32_3'
+; CHECK-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
+; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret <4 x float> %1
;
%1 = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
ret <4 x float> %1
diff --git a/llvm/test/Analysis/CostModel/X86/reduction.ll b/llvm/test/Analysis/CostModel/X86/reduction.ll
index c55545998d57f6..d7cf8e6cb8905b 100644
--- a/llvm/test/Analysis/CostModel/X86/reduction.ll
+++ b/llvm/test/Analysis/CostModel/X86/reduction.ll
@@ -926,8 +926,8 @@ define fastcc double @pairwise_reduction4double(<4 x double> %rdx, double %f1) {
define fastcc float @pairwise_reduction8float(<8 x float> %rdx, float %f1) {
; SSE2-LABEL: 'pairwise_reduction8float'
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
; SSE2-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %bin.rdx = fadd <8 x float> %rdx.shuf.0.0, %rdx.shuf.0.1
; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.0 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.1 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
@@ -939,8 +939,8 @@ define fastcc float @pairwise_reduction8float(<8 x float> %rdx, float %f1) {
; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %r
;
; SSSE3-LABEL: 'pairwise_reduction8float'
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSSE3-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSSE3-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %bin.rdx = fadd <8 x float> %rdx.shuf.0.0, %rdx.shuf.0.1
; SSSE3-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.0 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.1 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
@@ -952,8 +952,8 @@ define fastcc float @pairwise_reduction8float(<8 x float> %rdx, float %f1) {
; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %r
;
; SSE42-LABEL: 'pairwise_reduction8float'
-; SSE42-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE42-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
+; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
; SSE42-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %bin.rdx = fadd <8 x float> %rdx.shuf.0.0, %rdx.shuf.0.1
; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.0 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.1 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
@@ -991,8 +991,8 @@ define fastcc float @pairwise_reduction8float(<8 x float> %rdx, float %f1) {
; AVX2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret float %r
;
; SLM-LABEL: 'pairwise_reduction8float'
-; SLM-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
-; SLM-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
+; SLM-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.0 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 poison, i32 poison, i32 poison, i32 poison>
+; SLM-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.0.1 = shufflevector <8 x float> %rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 5, i32 7, i32 poison, i32 poison, i32 poison, i32 poison>
; SLM-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %bin.rdx = fadd <8 x float> %rdx.shuf.0.0, %rdx.shuf.0.1
; SLM-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.0 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 0, i32 2, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
; SLM-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rdx.shuf.1.1 = shufflevector <8 x float> %bin.rdx, <8 x float> undef, <8 x i32> <i32 1, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
diff --git a/llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-codesize.ll b/llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-codesize.ll
index bcba890867ed21..11ee433cae26c2 100644
--- a/llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-codesize.ll
+++ b/llvm/test/Analysis/CostModel/X86/shuffle-insert_subvector-codesize.ll
@@ -133,98 +133,36 @@ define void @test_vXi64(<2 x i64> %src128, <4 x i64> %src256, <8 x i64> %src512)
}
define void @test_vXf32(<2 x float> %src64, <4 x float> %src128, <8 x float> %src256, <16 x float> %src512) {
-; SSE2-LABEL: 'test_vXf32'
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_128 = shufflevector <2 x float> %src64, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_256 = shufflevector <2 x float> %src64, <2 x float> undef, <8 x i32> <i32 0, i32 1, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_512 = shufflevector <2 x float> %src64, <2 x float> undef, <16 x i32> <i32 0, i32 1, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src128_256 = shufflevector <4 x float> %src128, <4 x float> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src128_512 = shufflevector <4 x float> %src128, <4 x float> undef, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src256_512 = shufflevector <8 x float> %src256, <8 x float> undef, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V128_01 = shufflevector <4 x float> %src128, <4 x float> %src64_128, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V128_23 = shufflevector <4 x float> %src128, <4 x float> %src64_128, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V256_01 = shufflevector <8 x float> %src256, <8 x float> %src64_256, <8 x i32> <i32 8, i32 9, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V256_23 = shufflevector <8 x float> %src256, <8 x float> %src64_256, <8 x i32> <i32 0, i32 1, i32 8, i32 9, i32 4, i32 5, i32 6, i32 7>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V256_45 = shufflevector <8 x float> %src256, <8 x float> %src64_256, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 8, i32 9, i32 6, i32 7>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V256_67 = shufflevector <8 x float> %src256, <8 x float> %src64_256, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 8, i32 9>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V256_0123 = shufflevector <8 x float> %src256, <8 x float> %src128_256, <8 x i32> <i32 8, i32 9, i32 10, i32 11, i32 4, i32 5, i32 6, i32 7>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V256_4567 = shufflevector <8 x float> %src256, <8 x float> %src128_256, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 8, i32 9, i32 10, i32 11>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V512_01 = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 16, i32 17, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V512_23 = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 16, i32 17, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V512_45 = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 16, i32 17, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V512_67 = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 16, i32 17, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V512_89 = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 16, i32 17, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V512_AB = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 16, i32 17, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V512_CD = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V512_EF = shufflevector <16 x float> %src512, <16 x float> %src64_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 16, i32 17>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_0123 = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 16, i32 17, i32 18, i32 19, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_4567 = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 16, i32 17, i32 18, i32 19, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_89AB = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 16, i32 17, i32 18, i32 19, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_CDEF = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 16, i32 17, i32 18, i32 19>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_01234567 = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V512_89ABCDEF = shufflevector <16 x float> %src512, <16 x float> %src128_512, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: ret void
-;
-; SSSE3-LABEL: 'test_vXf32'
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_128 = shufflevector <2 x float> %src64, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_256 = shufflevector <2 x float> %src64, <2 x float> undef, <8 x i32> <i32 0, i32 1, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src64_512 = shufflevector <2 x float> %src64, <2 x float> undef, <16 x i32> <i32 0, i32 1, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src128_256 = shufflevector <4 x float> %src128, <4 x float> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src128_512 = shufflevector <4 x float> %src128, <4 x float> undef, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %src256_512 = shufflevector <8 x float> %src256, <8 x float> undef, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison, i32 poison>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V128_01 = shufflevector <4 x float> %src128, <4 x float> %src64_128, <4 x i32> <i32 4, i32 5, i32 2, i32 3>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V128_23 = shufflevector <4 x float> %src128, <4 x float> %src64_128, <4 x i32> <i32 0, i32 1, i32 4, i32 5>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V256_01 = shufflevector <8 x float> %src256, <8 x float> %src64_256, <8 x i32> <i32 8, i32 9, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V256_23 = shufflevector <8 x float> %src256, <8 x float> %src6...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/121778
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