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[InstCombine] add a vector version of a test added in r291262; NFC 

llvm-svn: 291265
This commit is contained in:
Sanjay Patel 2017-01-06 19:14:05 +00:00
parent 35cfca2e20
commit 2715d92389
1 changed files with 13 additions and 0 deletions
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llvm/test/Transforms/InstCombine/icmp-shl-nsw.ll
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@ -201,5 +201,18 @@ define i1 @icmp_sgt11(i8 %x) {
ret i1 %cmp
}
; Splat vector version should fold the same way.
define <2 x i1> @icmp_sgt11_vec(<2 x i8> %x) {
; CHECK-LABEL: @icmp_sgt11_vec(
; CHECK-NEXT: [[SHL:%.*]] = shl nsw <2 x i8> %x, <i8 7, i8 7>
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt <2 x i8> [[SHL]], <i8 -2, i8 -2>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl nsw <2 x i8> %x, <i8 7, i8 7>
%cmp = icmp sgt <2 x i8> %shl, <i8 -2, i8 -2>
ret <2 x i1> %cmp
}
; Known bits analysis returns false for compares with >=0.