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[X86] Add knownbits vector BSWAP test

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In preparation for demandedelts support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Simon Pilgrim 2016-11-11 11:33:21 +00:00
parent 912c7ec127
commit 970d6e800d
1 changed files with 22 additions and 0 deletions
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22
test/CodeGen/X86/known-bits-vector.ll
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@ -305,3 +305,25 @@ define <4 x i32> @knownbits_mask_srem_shuffle_lshr(<4 x i32> %a0) nounwind {
%4 = lshr <4 x i32> %3, <i32 22, i32 22, i32 22, i32 22>
ret <4 x i32> %4
}
define <4 x i32> @knownbits_mask_bswap_shuffle_shl(<4 x i32> %a0) nounwind {
; X32-LABEL: knownbits_mask_bswap_shuffle_shl:
; X32: # BB#0:
; X32-NEXT: vpand {{\.LCPI.*}}, %xmm0, %xmm0
; X32-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,3,2,1,0,15,14,13,12,15,14,13,12]
; X32-NEXT: vpslld $22, %xmm0, %xmm0
; X32-NEXT: retl
;
; X64-LABEL: knownbits_mask_bswap_shuffle_shl:
; X64: # BB#0:
; X64-NEXT: vpand {{.*}}(%rip), %xmm0, %xmm0
; X64-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,3,2,1,0,15,14,13,12,15,14,13,12]
; X64-NEXT: vpslld $22, %xmm0, %xmm0
; X64-NEXT: retq
%1 = and <4 x i32> %a0, <i32 32767, i32 -1, i32 -1, i32 32767>
%2 = call <4 x i32> @llvm.bswap.v4i32(<4 x i32> %1)
%3 = shufflevector <4 x i32> %2, <4 x i32> undef, <4 x i32> <i32 0, i32 0, i32 3, i32 3>
%4 = shl <4 x i32> %3, <i32 22, i32 22, i32 22, i32 22>
ret <4 x i32> %4
}
declare <4 x i32> @llvm.bswap.v4i32(<4 x i32>)