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[X86][SSE] Add UNDEF test case for combineSelect ISD::USUBSAT matching (PR40083)

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llvm-svn: 352329
This commit is contained in:
Simon Pilgrim 2019-01-27 20:52:34 +00:00
parent f10b6623cc
commit e5cf884018
1 changed files with 45 additions and 0 deletions
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45
llvm/test/CodeGen/X86/psubus.ll
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@ -2747,3 +2747,48 @@ entry:
%4 = extractelement <2 x i64> %3, i32 0
ret i64 %4
}
; PR40083
define i64 @test31(<2 x i64> %x) {
; SSE-LABEL: test31:
; SSE: # %bb.0:
; SSE-NEXT: movdqa {{.*#+}} xmm1 = <70,70,70,70,70,70,70,70,u,u,u,u,u,u,u,u>
; SSE-NEXT: pminub %xmm0, %xmm1
; SSE-NEXT: pcmpeqb %xmm0, %xmm1
; SSE-NEXT: paddb {{.*}}(%rip), %xmm0
; SSE-NEXT: pandn %xmm0, %xmm1
; SSE-NEXT: movq %xmm1, %rax
; SSE-NEXT: retq
;
; AVX1-LABEL: test31:
; AVX1: # %bb.0:
; AVX1-NEXT: vpminub {{.*}}(%rip), %xmm0, %xmm1
; AVX1-NEXT: vpcmpeqb %xmm1, %xmm0, %xmm1
; AVX1-NEXT: vpaddb {{.*}}(%rip), %xmm0, %xmm0
; AVX1-NEXT: vpandn %xmm0, %xmm1, %xmm0
; AVX1-NEXT: vmovq %xmm0, %rax
; AVX1-NEXT: retq
;
; AVX2-LABEL: test31:
; AVX2: # %bb.0:
; AVX2-NEXT: vpminub {{.*}}(%rip), %xmm0, %xmm1
; AVX2-NEXT: vpcmpeqb %xmm1, %xmm0, %xmm1
; AVX2-NEXT: vpaddb {{.*}}(%rip), %xmm0, %xmm0
; AVX2-NEXT: vpandn %xmm0, %xmm1, %xmm0
; AVX2-NEXT: vmovq %xmm0, %rax
; AVX2-NEXT: retq
;
; AVX512-LABEL: test31:
; AVX512: # %bb.0:
; AVX512-NEXT: vpcmpnleub {{.*}}(%rip), %xmm0, %k1
; AVX512-NEXT: vpaddb {{.*}}(%rip), %xmm0, %xmm0 {%k1} {z}
; AVX512-NEXT: vmovq %xmm0, %rax
; AVX512-NEXT: retq
%t0 = bitcast <2 x i64> %x to <16 x i8>
%cmp = icmp ugt <16 x i8> %t0, <i8 70, i8 70, i8 70, i8 70, i8 70, i8 70, i8 70, i8 70, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef>
%bop = add <16 x i8> %t0, <i8 -71, i8 -71, i8 -71, i8 -71, i8 -71, i8 -71, i8 -71, i8 -71, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef, i8 undef>
%sel = select <16 x i1> %cmp, <16 x i8> %bop, <16 x i8> zeroinitializer
%bc = bitcast <16 x i8> %sel to <2 x i64>
%ext = extractelement <2 x i64> %bc, i32 0
ret i64 %ext
}