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[x86] add tests for fneg with undefs; NFC 

This was originally part of D61419.

llvm-svn: 359896
This commit is contained in:
Sanjay Patel 2019-05-03 15:09:53 +00:00
parent 344d68d3c9
commit d0336b1e3f
1 changed files with 68 additions and 0 deletions
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68
llvm/test/CodeGen/X86/vec_fneg.ll
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@ -21,6 +21,74 @@ define <4 x float> @t1(<4 x float> %Q) nounwind {
ret <4 x float> %tmp
}
; Possibly misplaced test, but since we're checking undef scenarios...
define float @scalar_fsub_neg0_undef(float %x) nounwind {
; X32-SSE1-LABEL: scalar_fsub_neg0_undef:
; X32-SSE1: # %bb.0:
; X32-SSE1-NEXT: pushl %eax
; X32-SSE1-NEXT: xorps {{\.LCPI.*}}, %xmm0
; X32-SSE1-NEXT: movss %xmm0, (%esp)
; X32-SSE1-NEXT: flds (%esp)
; X32-SSE1-NEXT: popl %eax
; X32-SSE1-NEXT: retl
;
; X32-SSE2-LABEL: scalar_fsub_neg0_undef:
; X32-SSE2: # %bb.0:
; X32-SSE2-NEXT: pushl %eax
; X32-SSE2-NEXT: movss %xmm0, (%esp)
; X32-SSE2-NEXT: flds (%esp)
; X32-SSE2-NEXT: popl %eax
; X32-SSE2-NEXT: retl
;
; X64-SSE1-LABEL: scalar_fsub_neg0_undef:
; X64-SSE1: # %bb.0:
; X64-SSE1-NEXT: xorps {{.*}}(%rip), %xmm0
; X64-SSE1-NEXT: retq
;
; X64-SSE2-LABEL: scalar_fsub_neg0_undef:
; X64-SSE2: # %bb.0:
; X64-SSE2-NEXT: retq
%r = fsub float -0.0, undef
ret float %r
}
define <4 x float> @fsub_neg0_undef(<4 x float> %Q) nounwind {
; X32-SSE1-LABEL: fsub_neg0_undef:
; X32-SSE1: # %bb.0:
; X32-SSE1-NEXT: xorps {{\.LCPI.*}}, %xmm0
; X32-SSE1-NEXT: retl
;
; X32-SSE2-LABEL: fsub_neg0_undef:
; X32-SSE2: # %bb.0:
; X32-SSE2-NEXT: retl
;
; X64-SSE1-LABEL: fsub_neg0_undef:
; X64-SSE1: # %bb.0:
; X64-SSE1-NEXT: xorps {{.*}}(%rip), %xmm0
; X64-SSE1-NEXT: retq
;
; X64-SSE2-LABEL: fsub_neg0_undef:
; X64-SSE2: # %bb.0:
; X64-SSE2-NEXT: retq
%tmp = fsub <4 x float> < float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00 >, undef
ret <4 x float> %tmp
}
define <4 x float> @fsub_neg0_undef_elts_undef(<4 x float> %x) {
; X32-SSE-LABEL: fsub_neg0_undef_elts_undef:
; X32-SSE: # %bb.0:
; X32-SSE-NEXT: movaps {{.*#+}} xmm0 = <NaN,u,u,NaN>
; X32-SSE-NEXT: retl
;
; X64-SSE-LABEL: fsub_neg0_undef_elts_undef:
; X64-SSE: # %bb.0:
; X64-SSE-NEXT: movaps {{.*#+}} xmm0 = <NaN,u,u,NaN>
; X64-SSE-NEXT: retq
%r = fsub <4 x float> <float -0.0, float undef, float undef, float -0.0>, undef
ret <4 x float> %r
}
; This test verifies that we generate an FP subtraction because "0.0 - x" is not an fneg.
define <4 x float> @t2(<4 x float> %Q) nounwind {
; X32-SSE-LABEL: t2: