[PATCH] D111014: [X86][Costmodel] Load/store i16 Stride=3 VF=2 interleaving costs
Roman Lebedev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun Oct 3 05:26:31 PDT 2021
lebedev.ri created this revision.
lebedev.ri added a reviewer: RKSimon.
lebedev.ri added a project: LLVM.
Herald added subscribers: pengfei, hiraditya.
lebedev.ri requested review of this revision.
The only sched models that for cpu's that support avx2
but not avx512 are: haswell, broadwell, skylake, zen1-3
For load we have:
https://godbolt.org/z/xnE988aej - for intels `Block RThroughput: =5.0`; for ryzens, `Block RThroughput: <=2.5`
So pick cost of `5`.
For store we have:
https://godbolt.org/z/rMGT31Tnh - for intels `Block RThroughput: =4.0`; for ryzens, `Block RThroughput: <=2.0`
So pick cost of `4`.
I'm directly using the shuffling asm the llc produced,
without any manual fixups that may be needed
to ensure sequential execution.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D111014
Files:
llvm/lib/Target/X86/X86TargetTransformInfo.cpp
llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-3.ll
llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-3.ll
Index: llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-3.ll
===================================================================
--- llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-3.ll
+++ llvm/test/Analysis/CostModel/X86/interleaved-store-i16-stride-3.ll
@@ -26,7 +26,7 @@
; AVX1: LV: Found an estimated cost of 258 for VF 32 For instruction: store i16 %v2, i16* %out2, align 2
;
; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction: store i16 %v2, i16* %out2, align 2
-; AVX2: LV: Found an estimated cost of 15 for VF 2 For instruction: store i16 %v2, i16* %out2, align 2
+; AVX2: LV: Found an estimated cost of 7 for VF 2 For instruction: store i16 %v2, i16* %out2, align 2
; AVX2: LV: Found an estimated cost of 30 for VF 4 For instruction: store i16 %v2, i16* %out2, align 2
; AVX2: LV: Found an estimated cost of 53 for VF 8 For instruction: store i16 %v2, i16* %out2, align 2
; AVX2: LV: Found an estimated cost of 129 for VF 16 For instruction: store i16 %v2, i16* %out2, align 2
Index: llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-3.ll
===================================================================
--- llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-3.ll
+++ llvm/test/Analysis/CostModel/X86/interleaved-load-i16-stride-3.ll
@@ -26,7 +26,7 @@
; AVX1: LV: Found an estimated cost of 258 for VF 32 For instruction: %v0 = load i16, i16* %in0, align 2
;
; AVX2: LV: Found an estimated cost of 1 for VF 1 For instruction: %v0 = load i16, i16* %in0, align 2
-; AVX2: LV: Found an estimated cost of 15 for VF 2 For instruction: %v0 = load i16, i16* %in0, align 2
+; AVX2: LV: Found an estimated cost of 8 for VF 2 For instruction: %v0 = load i16, i16* %in0, align 2
; AVX2: LV: Found an estimated cost of 31 for VF 4 For instruction: %v0 = load i16, i16* %in0, align 2
; AVX2: LV: Found an estimated cost of 58 for VF 8 For instruction: %v0 = load i16, i16* %in0, align 2
; AVX2: LV: Found an estimated cost of 129 for VF 16 For instruction: %v0 = load i16, i16* %in0, align 2
Index: llvm/lib/Target/X86/X86TargetTransformInfo.cpp
===================================================================
--- llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -5092,6 +5092,8 @@
{3, MVT::v16i8, 11}, // (load 48i8 and) deinterleave into 3 x 16i8
{3, MVT::v32i8, 14}, // (load 96i8 and) deinterleave into 3 x 32i8
+ {3, MVT::v2i16, 5}, // (load 6i16 and) deinterleave into 3 x 2i16
+
{3, MVT::v8i32, 17}, // (load 24i32 and) deinterleave into 3 x 8i32
{4, MVT::v2i8, 4}, // (load 8i8 and) deinterleave into 4 x 2i8
@@ -5144,6 +5146,8 @@
{3, MVT::v16i8, 11}, // interleave 3 x 16i8 into 48i8 (and store)
{3, MVT::v32i8, 13}, // interleave 3 x 32i8 into 96i8 (and store)
+ {3, MVT::v2i16, 4}, // interleave 3 x 2i16 into 6i16 (and store)
+
{4, MVT::v2i8, 4}, // interleave 4 x 2i8 into 8i8 (and store)
{4, MVT::v4i8, 4}, // interleave 4 x 4i8 into 16i8 (and store)
{4, MVT::v8i8, 4}, // interleave 4 x 8i8 into 32i8 (and store)
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