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[x86] add test for (X - 0.0) vector with undef elts; NFC

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llvm-svn: 343863
This commit is contained in:
Sanjay Patel 2018-10-05 17:36:51 +00:00
parent 82a21c5635
commit 9b272ef9b1
1 changed files with 29 additions and 3 deletions
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32
test/CodeGen/X86/vec_fneg.ll
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@ -99,15 +99,15 @@ define <2 x float> @fneg_bitcast(i64 %i) nounwind {
ret <2 x float> %fneg
}
define <4 x float> @undef_elts_v4f32(<4 x float> %x) {
; X32-SSE-LABEL: undef_elts_v4f32:
define <4 x float> @fneg_undef_elts_v4f32(<4 x float> %x) {
; X32-SSE-LABEL: fneg_undef_elts_v4f32:
; X32-SSE: # %bb.0:
; X32-SSE-NEXT: movaps {{.*#+}} xmm1 = <-0,u,u,-0>
; X32-SSE-NEXT: subps %xmm0, %xmm1
; X32-SSE-NEXT: movaps %xmm1, %xmm0
; X32-SSE-NEXT: retl
;
; X64-SSE-LABEL: undef_elts_v4f32:
; X64-SSE-LABEL: fneg_undef_elts_v4f32:
; X64-SSE: # %bb.0:
; X64-SSE-NEXT: movaps {{.*#+}} xmm1 = <-0,u,u,-0>
; X64-SSE-NEXT: subps %xmm0, %xmm1
@ -117,3 +117,29 @@ define <4 x float> @undef_elts_v4f32(<4 x float> %x) {
ret <4 x float> %r
}
; This isn't fneg, but similarly check that (X - 0.0) is simplified.
define <4 x float> @fsub0_undef_elts_v4f32(<4 x float> %x) {
; X32-SSE1-LABEL: fsub0_undef_elts_v4f32:
; X32-SSE1: # %bb.0:
; X32-SSE1-NEXT: retl
;
; X32-SSE2-LABEL: fsub0_undef_elts_v4f32:
; X32-SSE2: # %bb.0:
; X32-SSE2-NEXT: xorps %xmm1, %xmm1
; X32-SSE2-NEXT: subps %xmm1, %xmm0
; X32-SSE2-NEXT: retl
;
; X64-SSE1-LABEL: fsub0_undef_elts_v4f32:
; X64-SSE1: # %bb.0:
; X64-SSE1-NEXT: retq
;
; X64-SSE2-LABEL: fsub0_undef_elts_v4f32:
; X64-SSE2: # %bb.0:
; X64-SSE2-NEXT: xorps %xmm1, %xmm1
; X64-SSE2-NEXT: subps %xmm1, %xmm0
; X64-SSE2-NEXT: retq
%r = fsub <4 x float> %x, <float 0.0, float undef, float 0.0, float undef>
ret <4 x float> %r
}