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There are cases of AVX-512 instructions that have two possible encodings. This is the case with instructions that use vector registers with low indexes of 0 - 15 and do not use the zmm registers or the mask k registers. The EVEX encoding prefix requires 4 bytes whereas the VEX prefix can take only up to 3 bytes. Consequently, using the VEX encoding for these instructions results in a code size reduction of ~2 bytes even though it is compiled with the AVX-512 features enabled. Reviewers: Craig Topper, Zvi Rackoover, Elena Demikhovsky Differential Revision: https://reviews.llvm.org/D27901 llvm-svn: 290663
105 lines
6.6 KiB
LLVM
105 lines
6.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown -mattr=+avx512bw,+avx512vl | FileCheck %s --check-prefix=X32
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx512bw,+avx512vl | FileCheck %s --check-prefix=X64
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declare <16 x i16> @llvm.x86.avx512.mask.permvar.hi.256(<16 x i16>, <16 x i16>, <16 x i16>, i16)
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declare <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16>, <16 x i16>, <16 x i16>, i16)
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declare <16 x i16> @llvm.x86.avx512.mask.vpermi2var.hi.256(<16 x i16>, <16 x i16>, <16 x i16>, i16)
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define <16 x i16> @combine_vpermt2var_16i16_identity(<16 x i16> %x0, <16 x i16> %x1) {
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; X32-LABEL: combine_vpermt2var_16i16_identity:
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; X32: # BB#0:
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermt2var_16i16_identity:
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; X64: # BB#0:
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>, <16 x i16> %x0, <16 x i16> %x1, i16 -1)
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%res1 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 15, i16 30, i16 13, i16 28, i16 11, i16 26, i16 9, i16 24, i16 7, i16 22, i16 5, i16 20, i16 3, i16 18, i16 1, i16 16>, <16 x i16> %res0, <16 x i16> %res0, i16 -1)
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ret <16 x i16> %res1
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}
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define <16 x i16> @combine_vpermt2var_16i16_identity_mask(<16 x i16> %x0, <16 x i16> %x1, i16 %m) {
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; X32-LABEL: combine_vpermt2var_16i16_identity_mask:
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; X32: # BB#0:
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; X32-NEXT: kmovw {{[0-9]+}}(%esp), %k1
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; X32-NEXT: vmovdqu {{.*#+}} ymm2 = [15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0]
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; X32-NEXT: vpermi2w %ymm1, %ymm0, %ymm2 {%k1} {z}
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; X32-NEXT: vmovdqu {{.*#+}} ymm0 = [15,30,13,28,11,26,9,24,7,22,5,20,3,18,1,16]
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; X32-NEXT: vpermi2w %ymm2, %ymm2, %ymm0 {%k1} {z}
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermt2var_16i16_identity_mask:
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; X64: # BB#0:
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; X64-NEXT: kmovw %edi, %k1
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; X64-NEXT: vmovdqu {{.*#+}} ymm2 = [15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0]
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; X64-NEXT: vpermi2w %ymm1, %ymm0, %ymm2 {%k1} {z}
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; X64-NEXT: vmovdqu {{.*#+}} ymm0 = [15,30,13,28,11,26,9,24,7,22,5,20,3,18,1,16]
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; X64-NEXT: vpermi2w %ymm2, %ymm2, %ymm0 {%k1} {z}
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>, <16 x i16> %x0, <16 x i16> %x1, i16 %m)
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%res1 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 15, i16 30, i16 13, i16 28, i16 11, i16 26, i16 9, i16 24, i16 7, i16 22, i16 5, i16 20, i16 3, i16 18, i16 1, i16 16>, <16 x i16> %res0, <16 x i16> %res0, i16 %m)
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ret <16 x i16> %res1
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}
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define <16 x i16> @combine_vpermi2var_16i16_as_permw(<16 x i16> %x0, <16 x i16> %x1) {
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; X32-LABEL: combine_vpermi2var_16i16_as_permw:
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; X32: # BB#0:
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; X32-NEXT: vmovdqu {{.*#+}} ymm1 = [15,0,14,1,13,2,12,3,11,4,10,5,9,6,8,7]
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; X32-NEXT: vpermw %ymm0, %ymm1, %ymm0
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermi2var_16i16_as_permw:
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; X64: # BB#0:
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; X64-NEXT: vmovdqu {{.*#+}} ymm1 = [15,0,14,1,13,2,12,3,11,4,10,5,9,6,8,7]
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; X64-NEXT: vpermw %ymm0, %ymm1, %ymm0
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.mask.vpermi2var.hi.256(<16 x i16> %x0, <16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>, <16 x i16> %x1, i16 -1)
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%res1 = call <16 x i16> @llvm.x86.avx512.mask.vpermi2var.hi.256(<16 x i16> %res0, <16 x i16> <i16 0, i16 15, i16 1, i16 14, i16 2, i16 13, i16 3, i16 12, i16 4, i16 11, i16 5, i16 10, i16 6, i16 9, i16 7, i16 8>, <16 x i16> %res0, i16 -1)
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ret <16 x i16> %res1
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}
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define <16 x i16> @combine_vpermt2var_vpermi2var_16i16_as_vperm2(<16 x i16> %x0, <16 x i16> %x1) {
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; X32-LABEL: combine_vpermt2var_vpermi2var_16i16_as_vperm2:
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; X32: # BB#0:
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; X32-NEXT: vmovdqu {{.*#+}} ymm2 = [0,31,2,2,4,29,6,27,8,25,10,23,12,21,14,19]
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; X32-NEXT: vpermt2w %ymm1, %ymm2, %ymm0
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermt2var_vpermi2var_16i16_as_vperm2:
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; X64: # BB#0:
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; X64-NEXT: vmovdqu {{.*#+}} ymm2 = [0,31,2,2,4,29,6,27,8,25,10,23,12,21,14,19]
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; X64-NEXT: vpermt2w %ymm1, %ymm2, %ymm0
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.mask.vpermi2var.hi.256(<16 x i16> %x0, <16 x i16> <i16 0, i16 31, i16 2, i16 29, i16 4, i16 27, i16 6, i16 25, i16 8, i16 23, i16 10, i16 21, i16 12, i16 19, i16 14, i16 17>, <16 x i16> %x1, i16 -1)
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%res1 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 0, i16 17, i16 2, i16 18, i16 4, i16 19, i16 6, i16 21, i16 8, i16 23, i16 10, i16 25, i16 12, i16 27, i16 14, i16 29>, <16 x i16> %res0, <16 x i16> %res0, i16 -1)
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ret <16 x i16> %res1
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}
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define <16 x i16> @combine_vpermt2var_vpermi2var_16i16_as_unpckhwd(<16 x i16> %a0, <16 x i16> %a1) {
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; X32-LABEL: combine_vpermt2var_vpermi2var_16i16_as_unpckhwd:
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; X32: # BB#0:
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; X32-NEXT: vpunpckhwd {{.*#+}} ymm0 = ymm1[4],ymm0[4],ymm1[5],ymm0[5],ymm1[6],ymm0[6],ymm1[7],ymm0[7],ymm1[12],ymm0[12],ymm1[13],ymm0[13],ymm1[14],ymm0[14],ymm1[15],ymm0[15]
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermt2var_vpermi2var_16i16_as_unpckhwd:
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; X64: # BB#0:
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; X64-NEXT: vpunpckhwd {{.*#+}} ymm0 = ymm1[4],ymm0[4],ymm1[5],ymm0[5],ymm1[6],ymm0[6],ymm1[7],ymm0[7],ymm1[12],ymm0[12],ymm1[13],ymm0[13],ymm1[14],ymm0[14],ymm1[15],ymm0[15]
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.mask.vpermi2var.hi.256(<16 x i16> %a0, <16 x i16> <i16 20, i16 4, i16 21, i16 5, i16 22, i16 6, i16 23, i16 7, i16 28, i16 12, i16 29, i16 13, i16 30, i16 14, i16 31, i16 15>, <16 x i16> %a1, i16 -1)
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ret <16 x i16> %res0
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}
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define <16 x i16> @combine_vpermt2var_vpermi2var_16i16_as_unpcklwd(<16 x i16> %a0, <16 x i16> %a1) {
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; X32-LABEL: combine_vpermt2var_vpermi2var_16i16_as_unpcklwd:
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; X32: # BB#0:
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; X32-NEXT: vpunpcklwd {{.*#+}} ymm0 = ymm0[0],ymm1[0],ymm0[1],ymm1[1],ymm0[2],ymm1[2],ymm0[3],ymm1[3],ymm0[8],ymm1[8],ymm0[9],ymm1[9],ymm0[10],ymm1[10],ymm0[11],ymm1[11]
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; X32-NEXT: retl
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;
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; X64-LABEL: combine_vpermt2var_vpermi2var_16i16_as_unpcklwd:
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; X64: # BB#0:
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; X64-NEXT: vpunpcklwd {{.*#+}} ymm0 = ymm0[0],ymm1[0],ymm0[1],ymm1[1],ymm0[2],ymm1[2],ymm0[3],ymm1[3],ymm0[8],ymm1[8],ymm0[9],ymm1[9],ymm0[10],ymm1[10],ymm0[11],ymm1[11]
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; X64-NEXT: retq
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%res0 = call <16 x i16> @llvm.x86.avx512.maskz.vpermt2var.hi.256(<16 x i16> <i16 0, i16 16, i16 1, i16 17, i16 2, i16 18, i16 3, i16 19, i16 8, i16 24, i16 9, i16 25, i16 10, i16 26, i16 11, i16 27>, <16 x i16> %a0, <16 x i16> %a1, i16 -1)
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ret <16 x i16> %res0
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}
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