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[InstCombine] Add reduced sub/negate test from PR51584.

This commit is contained in:
Florian Hahn 2021-08-23 15:45:53 +01:00
parent 9577fac0fd
commit 7872074f22
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1 changed files with 12 additions and 0 deletions
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12
llvm/test/Transforms/InstCombine/sub.ll
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@ -1700,3 +1700,15 @@ define <2 x i8> @or_vec(<2 x i8> %X, <2 x i8> %Y) {
%r = sub <2 x i8> %a, %b
ret <2 x i8> %r
}
define i32 @pr51584(i32 %a, i32 %b) {
; CHECK-LABEL: @pr51584(
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[DOTNEG:%.*]] = sub i32 -11, [[TMP1]]
; CHECK-NEXT: ret i32 [[DOTNEG]]
;
%sub = sub i32 0, %a
%add = add nsw i32 11, %b
%sub1 = sub i32 %sub, %add
ret i32 %sub1
}