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[InstCombine] Add additional test for invert of lshr (NFC)

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This commit is contained in:
Nikita Popov 2023-12-01 16:07:18 +01:00
parent 852f6be696
commit 7007919cfd
1 changed files with 12 additions and 0 deletions
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12
llvm/test/Transforms/InstCombine/free-inversion.ll
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@ -524,3 +524,15 @@ define i8 @lshr_not_nneg(i8 %x, i8 %y) {
%shr.not = xor i8 %shr, -1
ret i8 %shr.not
}
define i8 @lshr_not_nneg2(i8 %x) {
; CHECK-LABEL: @lshr_not_nneg2(
; CHECK-NEXT: [[SHR:%.*]] = lshr i8 [[X:%.*]], 1
; CHECK-NEXT: [[SHR_NOT1:%.*]] = or i8 [[SHR]], -128
; CHECK-NEXT: ret i8 [[SHR_NOT1]]
;
%x.not = xor i8 %x, -1
%shr = lshr i8 %x.not, 1
%shr.not = xor i8 %shr, -1
ret i8 %shr.not
}