; X32-LABEL: knownbits_mask_shuffle_shuffle_sext:
; X32: # BB#0:
; X32-NEXT: vpand {{\.LCPI.*}}, %xmm0, %xmm0
+; X32-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; X32-NEXT: vpunpckhwd {{.*#+}} xmm0 = xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; X32-NEXT: retl
+;
+; X64-LABEL: knownbits_mask_shuffle_shuffle_sext:
+; X64: # BB#0:
+; X64-NEXT: vpand {{.*}}(%rip), %xmm0, %xmm0
+; X64-NEXT: vpxor %xmm1, %xmm1, %xmm1
+; X64-NEXT: vpunpckhwd {{.*#+}} xmm0 = xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
+; X64-NEXT: retq
+ %1 = and <8 x i16> %a0, <i16 -1, i16 -1, i16 -1, i16 -1, i16 15, i16 15, i16 15, i16 15>
+ %2 = shufflevector <8 x i16> %1, <8 x i16> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+ %3 = shufflevector <8 x i16> %2, <8 x i16> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %4 = sext <4 x i16> %3 to <4 x i32>
+ ret <4 x i32> %4
+}
+
+define <4 x i32> @knownbits_mask_shuffle_shuffle_undef_sext(<8 x i16> %a0) nounwind {
+; X32-LABEL: knownbits_mask_shuffle_shuffle_undef_sext:
+; X32: # BB#0:
+; X32-NEXT: vpand {{\.LCPI.*}}, %xmm0, %xmm0
; X32-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
; X32-NEXT: vpmovsxwd %xmm0, %xmm0
; X32-NEXT: retl
;
-; X64-LABEL: knownbits_mask_shuffle_shuffle_sext:
+; X64-LABEL: knownbits_mask_shuffle_shuffle_undef_sext:
; X64: # BB#0:
; X64-NEXT: vpand {{.*}}(%rip), %xmm0, %xmm0
; X64-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
; X64-NEXT: vpmovsxwd %xmm0, %xmm0
; X64-NEXT: retq
%1 = and <8 x i16> %a0, <i16 -1, i16 -1, i16 -1, i16 -1, i16 15, i16 15, i16 15, i16 15>
- %2 = shufflevector <8 x i16> %1, <8 x i16> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+ %2 = shufflevector <8 x i16> %1, <8 x i16> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%3 = shufflevector <8 x i16> %2, <8 x i16> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
%4 = sext <4 x i16> %3 to <4 x i32>
ret <4 x i32> %4