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llvm-mirror/test/CodeGen/X86/avx512vbmivl-intrinsics.ll
Gadi Haber 51f2170fda This is a large patch for X86 AVX-512 of an optimization for reducing code size by encoding EVEX AVX-512 instructions using the shorter VEX encoding when possible. 
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
2016-12-28 10:12:48 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; NOTE: Assertions have been autogenerated by update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+avx512vl -mattr=+avx512vbmi --show-mc-encoding| FileCheck %s
declare <16 x i8> @llvm.x86.avx512.mask.permvar.qi.128(<16 x i8>, <16 x i8>, <16 x i8>, i16)
define <16 x i8>@test_int_x86_avx512_mask_permvar_qi_128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_permvar_qi_128:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovw %edi, %k1 ## encoding: [0xc5,0xf8,0x92,0xcf]
; CHECK-NEXT: vpermb %xmm0, %xmm1, %xmm2 {%k1} ## encoding: [0x62,0xf2,0x75,0x09,0x8d,0xd0]
; CHECK-NEXT: vpermb %xmm0, %xmm1, %xmm3 {%k1} {z} ## encoding: [0x62,0xf2,0x75,0x89,0x8d,0xd8]
; CHECK-NEXT: vpermb %xmm0, %xmm1, %xmm0 ## encoding: [0x62,0xf2,0x75,0x08,0x8d,0xc0]
; CHECK-NEXT: vpaddb %xmm0, %xmm3, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe1,0xfc,0xc0]
; CHECK-NEXT: vpaddb %xmm0, %xmm2, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe9,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <16 x i8> @llvm.x86.avx512.mask.permvar.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3)
%res1 = call <16 x i8> @llvm.x86.avx512.mask.permvar.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> zeroinitializer, i16 %x3)
%res2 = call <16 x i8> @llvm.x86.avx512.mask.permvar.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 -1)
%res3 = add <16 x i8> %res, %res1
%res4 = add <16 x i8> %res3, %res2
ret <16 x i8> %res4
}
declare <32 x i8> @llvm.x86.avx512.mask.permvar.qi.256(<32 x i8>, <32 x i8>, <32 x i8>, i32)
define <32 x i8>@test_int_x86_avx512_mask_permvar_qi_256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_permvar_qi_256:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovd %edi, %k1 ## encoding: [0xc5,0xfb,0x92,0xcf]
; CHECK-NEXT: vpermb %ymm0, %ymm1, %ymm2 {%k1} ## encoding: [0x62,0xf2,0x75,0x29,0x8d,0xd0]
; CHECK-NEXT: vpermb %ymm0, %ymm1, %ymm3 {%k1} {z} ## encoding: [0x62,0xf2,0x75,0xa9,0x8d,0xd8]
; CHECK-NEXT: vpermb %ymm0, %ymm1, %ymm0 ## encoding: [0x62,0xf2,0x75,0x28,0x8d,0xc0]
; CHECK-NEXT: vpaddb %ymm0, %ymm3, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe5,0xfc,0xc0]
; CHECK-NEXT: vpaddb %ymm0, %ymm2, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xed,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <32 x i8> @llvm.x86.avx512.mask.permvar.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3)
%res1 = call <32 x i8> @llvm.x86.avx512.mask.permvar.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> zeroinitializer, i32 %x3)
%res2 = call <32 x i8> @llvm.x86.avx512.mask.permvar.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 -1)
%res3 = add <32 x i8> %res, %res1
%res4 = add <32 x i8> %res3, %res2
ret <32 x i8> %res4
}
declare <16 x i8> @llvm.x86.avx512.mask.pmultishift.qb.128(<16 x i8>, <16 x i8>, <16 x i8>, i16)
define <16 x i8>@test_int_x86_avx512_mask_pmultishift_qb_128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_pmultishift_qb_128:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovw %edi, %k1 ## encoding: [0xc5,0xf8,0x92,0xcf]
; CHECK-NEXT: vpmultishiftqb %xmm1, %xmm0, %xmm2 {%k1} ## encoding: [0x62,0xf2,0xfd,0x09,0x83,0xd1]
; CHECK-NEXT: vpmultishiftqb %xmm1, %xmm0, %xmm3 {%k1} {z} ## encoding: [0x62,0xf2,0xfd,0x89,0x83,0xd9]
; CHECK-NEXT: vpmultishiftqb %xmm1, %xmm0, %xmm0 ## encoding: [0x62,0xf2,0xfd,0x08,0x83,0xc1]
; CHECK-NEXT: vpaddb %xmm0, %xmm3, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe1,0xfc,0xc0]
; CHECK-NEXT: vpaddb %xmm0, %xmm2, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe9,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <16 x i8> @llvm.x86.avx512.mask.pmultishift.qb.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3)
%res1 = call <16 x i8> @llvm.x86.avx512.mask.pmultishift.qb.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> zeroinitializer, i16 %x3)
%res2 = call <16 x i8> @llvm.x86.avx512.mask.pmultishift.qb.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 -1)
%res3 = add <16 x i8> %res, %res1
%res4 = add <16 x i8> %res3, %res2
ret <16 x i8> %res4
}
declare <32 x i8> @llvm.x86.avx512.mask.pmultishift.qb.256(<32 x i8>, <32 x i8>, <32 x i8>, i32)
define <32 x i8>@test_int_x86_avx512_mask_pmultishift_qb_256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_pmultishift_qb_256:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovd %edi, %k1 ## encoding: [0xc5,0xfb,0x92,0xcf]
; CHECK-NEXT: vpmultishiftqb %ymm1, %ymm0, %ymm2 {%k1} ## encoding: [0x62,0xf2,0xfd,0x29,0x83,0xd1]
; CHECK-NEXT: vpmultishiftqb %ymm1, %ymm0, %ymm3 {%k1} {z} ## encoding: [0x62,0xf2,0xfd,0xa9,0x83,0xd9]
; CHECK-NEXT: vpmultishiftqb %ymm1, %ymm0, %ymm0 ## encoding: [0x62,0xf2,0xfd,0x28,0x83,0xc1]
; CHECK-NEXT: vpaddb %ymm0, %ymm3, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe5,0xfc,0xc0]
; CHECK-NEXT: vpaddb %ymm0, %ymm2, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xed,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <32 x i8> @llvm.x86.avx512.mask.pmultishift.qb.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3)
%res1 = call <32 x i8> @llvm.x86.avx512.mask.pmultishift.qb.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> zeroinitializer, i32 %x3)
%res2 = call <32 x i8> @llvm.x86.avx512.mask.pmultishift.qb.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 -1)
%res3 = add <32 x i8> %res, %res1
%res4 = add <32 x i8> %res3, %res2
ret <32 x i8> %res4
}
declare <16 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.128(<16 x i8>, <16 x i8>, <16 x i8>, i16)
define <16 x i8>@test_int_x86_avx512_mask_vpermi2var_qi_128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_vpermi2var_qi_128:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovw %edi, %k1 ## encoding: [0xc5,0xf8,0x92,0xcf]
; CHECK-NEXT: vmovdqa %xmm1, %xmm3 ## EVEX TO VEX Compression encoding: [0xc5,0xf9,0x6f,0xd9]
; CHECK-NEXT: vpermi2b %xmm2, %xmm0, %xmm3 {%k1} ## encoding: [0x62,0xf2,0x7d,0x09,0x75,0xda]
; CHECK-NEXT: vpermi2b %xmm2, %xmm0, %xmm1 ## encoding: [0x62,0xf2,0x7d,0x08,0x75,0xca]
; CHECK-NEXT: vpxor %xmm4, %xmm4, %xmm4 ## EVEX TO VEX Compression encoding: [0xc5,0xd9,0xef,0xe4]
; CHECK-NEXT: vpermi2b %xmm2, %xmm0, %xmm4 {%k1} {z} ## encoding: [0x62,0xf2,0x7d,0x89,0x75,0xe2]
; CHECK-NEXT: vpaddb %xmm1, %xmm4, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xd9,0xfc,0xc1]
; CHECK-NEXT: vpaddb %xmm0, %xmm3, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe1,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <16 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3)
%res1 = call <16 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.128(<16 x i8> %x0, <16 x i8> zeroinitializer, <16 x i8> %x2, i16 %x3)
%res2 = call <16 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 -1)
%res3 = add <16 x i8> %res, %res1
%res4 = add <16 x i8> %res3, %res2
ret <16 x i8> %res4
}
declare <32 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.256(<32 x i8>, <32 x i8>, <32 x i8>, i32)
define <32 x i8>@test_int_x86_avx512_mask_vpermi2var_qi_256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_vpermi2var_qi_256:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovd %edi, %k1 ## encoding: [0xc5,0xfb,0x92,0xcf]
; CHECK-NEXT: vmovdqa %ymm1, %ymm3 ## EVEX TO VEX Compression encoding: [0xc5,0xfd,0x6f,0xd9]
; CHECK-NEXT: vpermi2b %ymm2, %ymm0, %ymm3 {%k1} ## encoding: [0x62,0xf2,0x7d,0x29,0x75,0xda]
; CHECK-NEXT: vpermi2b %ymm2, %ymm0, %ymm1 ## encoding: [0x62,0xf2,0x7d,0x28,0x75,0xca]
; CHECK-NEXT: vpxor %ymm4, %ymm4, %ymm4 ## EVEX TO VEX Compression encoding: [0xc5,0xdd,0xef,0xe4]
; CHECK-NEXT: vpermi2b %ymm2, %ymm0, %ymm4 {%k1} {z} ## encoding: [0x62,0xf2,0x7d,0xa9,0x75,0xe2]
; CHECK-NEXT: vpaddb %ymm1, %ymm4, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xdd,0xfc,0xc1]
; CHECK-NEXT: vpaddb %ymm0, %ymm3, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe5,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <32 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3)
%res1 = call <32 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.256(<32 x i8> %x0, <32 x i8> zeroinitializer, <32 x i8> %x2, i32 %x3)
%res2 = call <32 x i8> @llvm.x86.avx512.mask.vpermi2var.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 -1)
%res3 = add <32 x i8> %res, %res1
%res4 = add <32 x i8> %res3, %res2
ret <32 x i8> %res4
}
declare <16 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.128(<16 x i8>, <16 x i8>, <16 x i8>, i16)
define <16 x i8>@test_int_x86_avx512_mask_vpermt2var_qi_128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_vpermt2var_qi_128:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovw %edi, %k1 ## encoding: [0xc5,0xf8,0x92,0xcf]
; CHECK-NEXT: vmovdqa %xmm1, %xmm3 ## EVEX TO VEX Compression encoding: [0xc5,0xf9,0x6f,0xd9]
; CHECK-NEXT: vpermt2b %xmm2, %xmm0, %xmm3 {%k1} ## encoding: [0x62,0xf2,0x7d,0x09,0x7d,0xda]
; CHECK-NEXT: vpermt2b %xmm2, %xmm0, %xmm1 ## encoding: [0x62,0xf2,0x7d,0x08,0x7d,0xca]
; CHECK-NEXT: vpxor %xmm4, %xmm4, %xmm4 ## EVEX TO VEX Compression encoding: [0xc5,0xd9,0xef,0xe4]
; CHECK-NEXT: vpermt2b %xmm2, %xmm0, %xmm4 {%k1} {z} ## encoding: [0x62,0xf2,0x7d,0x89,0x7d,0xe2]
; CHECK-NEXT: vpaddb %xmm1, %xmm4, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xd9,0xfc,0xc1]
; CHECK-NEXT: vpaddb %xmm0, %xmm3, %xmm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe1,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <16 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3)
%res1 = call <16 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.128(<16 x i8> %x0, <16 x i8> zeroinitializer, <16 x i8> %x2, i16 %x3)
%res2 = call <16 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 -1)
%res3 = add <16 x i8> %res, %res1
%res4 = add <16 x i8> %res3, %res2
ret <16 x i8> %res4
}
declare <32 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.256(<32 x i8>, <32 x i8>, <32 x i8>, i32)
define <32 x i8>@test_int_x86_avx512_mask_vpermt2var_qi_256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3) {
; CHECK-LABEL: test_int_x86_avx512_mask_vpermt2var_qi_256:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovd %edi, %k1 ## encoding: [0xc5,0xfb,0x92,0xcf]
; CHECK-NEXT: vmovdqa %ymm1, %ymm3 ## EVEX TO VEX Compression encoding: [0xc5,0xfd,0x6f,0xd9]
; CHECK-NEXT: vpermt2b %ymm2, %ymm0, %ymm3 {%k1} ## encoding: [0x62,0xf2,0x7d,0x29,0x7d,0xda]
; CHECK-NEXT: vpermt2b %ymm2, %ymm0, %ymm1 ## encoding: [0x62,0xf2,0x7d,0x28,0x7d,0xca]
; CHECK-NEXT: vpxor %ymm4, %ymm4, %ymm4 ## EVEX TO VEX Compression encoding: [0xc5,0xdd,0xef,0xe4]
; CHECK-NEXT: vpermt2b %ymm2, %ymm0, %ymm4 {%k1} {z} ## encoding: [0x62,0xf2,0x7d,0xa9,0x7d,0xe2]
; CHECK-NEXT: vpaddb %ymm1, %ymm4, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xdd,0xfc,0xc1]
; CHECK-NEXT: vpaddb %ymm0, %ymm3, %ymm0 ## EVEX TO VEX Compression encoding: [0xc5,0xe5,0xfc,0xc0]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <32 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3)
%res1 = call <32 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.256(<32 x i8> %x0, <32 x i8> zeroinitializer, <32 x i8> %x2, i32 %x3)
%res2 = call <32 x i8> @llvm.x86.avx512.mask.vpermt2var.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 -1)
%res3 = add <32 x i8> %res, %res1
%res4 = add <32 x i8> %res3, %res2
ret <32 x i8> %res4
}
declare <16 x i8> @llvm.x86.avx512.maskz.vpermt2var.qi.128(<16 x i8>, <16 x i8>, <16 x i8>, i16)
define <16 x i8>@test_int_x86_avx512_maskz_vpermt2var_qi_128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3) {
; CHECK-LABEL: test_int_x86_avx512_maskz_vpermt2var_qi_128:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovw %edi, %k1 ## encoding: [0xc5,0xf8,0x92,0xcf]
; CHECK-NEXT: vpermi2b %xmm2, %xmm1, %xmm0 {%k1} {z} ## encoding: [0x62,0xf2,0x75,0x89,0x75,0xc2]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <16 x i8> @llvm.x86.avx512.maskz.vpermt2var.qi.128(<16 x i8> %x0, <16 x i8> %x1, <16 x i8> %x2, i16 %x3)
ret <16 x i8> %res
}
declare <32 x i8> @llvm.x86.avx512.maskz.vpermt2var.qi.256(<32 x i8>, <32 x i8>, <32 x i8>, i32)
define <32 x i8>@test_int_x86_avx512_maskz_vpermt2var_qi_256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3) {
; CHECK-LABEL: test_int_x86_avx512_maskz_vpermt2var_qi_256:
; CHECK: ## BB#0:
; CHECK-NEXT: kmovd %edi, %k1 ## encoding: [0xc5,0xfb,0x92,0xcf]
; CHECK-NEXT: vpermi2b %ymm2, %ymm1, %ymm0 {%k1} {z} ## encoding: [0x62,0xf2,0x75,0xa9,0x75,0xc2]
; CHECK-NEXT: retq ## encoding: [0xc3]
%res = call <32 x i8> @llvm.x86.avx512.maskz.vpermt2var.qi.256(<32 x i8> %x0, <32 x i8> %x1, <32 x i8> %x2, i32 %x3)
ret <32 x i8> %res
}
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