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[X86] Add knownbits vector TRUNC test 

In preparation for demandedelts support

llvm-svn: 286477
This commit is contained in:
Simon Pilgrim 2016-11-10 17:24:33 +00:00
parent fa8c99fda9
commit e517f0a417
1 changed files with 27 additions and 0 deletions
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27
llvm/test/CodeGen/X86/known-bits-vector.ll
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@ -186,3 +186,30 @@ define <4 x i32> @knownbits_mask_mul_shuffle_shl(<4 x i32> %a0, <4 x i32> %a1) n
%4 = shl <4 x i32> %3, <i32 22, i32 22, i32 22, i32 22>
ret <4 x i32> %4
}
define <4 x i32> @knownbits_mask_trunc_shuffle_shl(<4 x i64> %a0) nounwind {
; X32-LABEL: knownbits_mask_trunc_shuffle_shl:
; X32: # BB#0:
; X32-NEXT: vandps {{\.LCPI.*}}, %ymm0, %ymm0
; X32-NEXT: vextractf128 $1, %ymm0, %xmm1
; X32-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1,2,3],xmm1[4,5,6,7]
; X32-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,2,2]
; X32-NEXT: vpslld $22, %xmm0, %xmm0
; X32-NEXT: vzeroupper
; X32-NEXT: retl
;
; X64-LABEL: knownbits_mask_trunc_shuffle_shl:
; X64: # BB#0:
; X64-NEXT: vandps {{.*}}(%rip), %ymm0, %ymm0
; X64-NEXT: vextractf128 $1, %ymm0, %xmm1
; X64-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1,2,3],xmm1[4,5,6,7]
; X64-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,2,2]
; X64-NEXT: vpslld $22, %xmm0, %xmm0
; X64-NEXT: vzeroupper
; X64-NEXT: retq
%1 = and <4 x i64> %a0, <i64 -65536, i64 -7, i64 7, i64 -65536>
%2 = trunc <4 x i64> %1 to <4 x i32>
%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
}