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[X86][SSE] Add knownbits test demonstrating demandedelts not ignoring undef shuffle elements

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288825 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Simon Pilgrim 2016-12-06 17:00:47 +00:00
parent 06ec4e5b99
commit 057100dd3a
1 changed files with 21 additions and 0 deletions
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21
test/CodeGen/X86/known-bits-vector.ll
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@ -70,6 +70,27 @@ define <4 x i32> @knownbits_mask_shuffle_sext(<8 x i16> %a0) nounwind {
ret <4 x i32> %3 ret <4 x i32> %3
} }
define <4 x i32> @knownbits_mask_shuffle_shuffle_sext(<8 x i16> %a0) nounwind {
; X32-LABEL: knownbits_mask_shuffle_shuffle_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: # 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>
%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 float> @knownbits_mask_shuffle_uitofp(<4 x i32> %a0) nounwind { define <4 x float> @knownbits_mask_shuffle_uitofp(<4 x i32> %a0) nounwind {
; X32-LABEL: knownbits_mask_shuffle_uitofp: ; X32-LABEL: knownbits_mask_shuffle_uitofp:
; X32: # BB#0: ; X32: # BB#0: