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[X86][AVX] Add truncation as shuffle test for PR31451 

llvm-svn: 342908
This commit is contained in:
Simon Pilgrim 2018-09-24 17:26:31 +00:00
parent bf112ea25b
commit 51cbd838d0
1 changed files with 17 additions and 0 deletions
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17
llvm/test/CodeGen/X86/vector-shuffle-512-v16.ll
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@ -306,6 +306,23 @@ define <4 x i32> @test_v16i32_0_1_2_12 (<16 x i32> %v) {
ret <4 x i32> %res
}
;PR31451
;FIXME: can do better with vpcompress
define <4 x i32> @test_v16i32_0_4_8_12(<16 x i32> %v) {
; ALL-LABEL: test_v16i32_0_4_8_12:
; ALL: # %bb.0:
; ALL-NEXT: vextractf64x4 $1, %zmm0, %ymm1
; ALL-NEXT: vmovaps {{.*#+}} ymm2 = <u,u,0,4,u,u,u,u>
; ALL-NEXT: vpermps %ymm1, %ymm2, %ymm1
; ALL-NEXT: vmovaps {{.*#+}} ymm2 = <0,4,u,u,u,u,u,u>
; ALL-NEXT: vpermps %ymm0, %ymm2, %ymm0
; ALL-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; ALL-NEXT: vzeroupper
; ALL-NEXT: retq
%res = shufflevector <16 x i32> %v, <16 x i32> undef, <4 x i32> <i32 0, i32 4, i32 8, i32 12>
ret <4 x i32> %res
}
define <8 x float> @shuffle_v16f32_extract_256(float* %RET, float* %a) {
; ALL-LABEL: shuffle_v16f32_extract_256:
; ALL: # %bb.0: