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[x86] add test to show missed movddup load fold; NFC 

llvm-svn: 349773
This commit is contained in:
Sanjay Patel 2018-12-20 17:05:57 +00:00
parent 367a7b7d66
commit 18b008b577
1 changed files with 48 additions and 0 deletions
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48
llvm/test/CodeGen/X86/build-vector-128.ll
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@ -508,6 +508,54 @@ define <4 x i32> @test_buildvector_v4i32_splat_zext_i8(i8 %in) {
ret <4 x i32> %splat
}
define <4 x float> @movddup_load_fold(float %x, float %y) {
; SSE2-32-LABEL: movddup_load_fold:
; SSE2-32: # %bb.0:
; SSE2-32-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; SSE2-32-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
; SSE2-32-NEXT: retl
;
; SSE2-64-LABEL: movddup_load_fold:
; SSE2-64: # %bb.0:
; SSE2-64-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; SSE2-64-NEXT: movlhps {{.*#+}} xmm0 = xmm0[0,0]
; SSE2-64-NEXT: retq
;
; SSE41-32-LABEL: movddup_load_fold:
; SSE41-32: # %bb.0:
; SSE41-32-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; SSE41-32-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
; SSE41-32-NEXT: retl
;
; SSE41-64-LABEL: movddup_load_fold:
; SSE41-64: # %bb.0:
; SSE41-64-NEXT: insertps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[2,3]
; SSE41-64-NEXT: movddup {{.*#+}} xmm0 = xmm0[0,0]
; SSE41-64-NEXT: retq
;
; AVX-32-LABEL: movddup_load_fold:
; AVX-32: # %bb.0:
; AVX-32-NEXT: vmovsd {{.*#+}} xmm0 = mem[0],zero
; AVX-32-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
; AVX-32-NEXT: retl
;
; AVX1-64-LABEL: movddup_load_fold:
; AVX1-64: # %bb.0:
; AVX1-64-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[2,3]
; AVX1-64-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
; AVX1-64-NEXT: retq
;
; AVX2-64-LABEL: movddup_load_fold:
; AVX2-64: # %bb.0:
; AVX2-64-NEXT: vunpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; AVX2-64-NEXT: vmovddup {{.*#+}} xmm0 = xmm0[0,0]
; AVX2-64-NEXT: retq
%i0 = insertelement <4 x float> zeroinitializer, float %x, i32 0
%i1 = insertelement <4 x float> %i0, float %y, i32 1
%dup = shufflevector <4 x float> %i1, <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
ret <4 x float> %dup
}
; PR37502 - https://bugs.llvm.org/show_bug.cgi?id=37502
; Don't use a series of insertps when movddup will do.