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[InstCombine] Add missing test case for (xor (sext (cmp)), -1) -> (sext (!cmp)).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309839 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-08-02 17:33:02 +00:00
parent e97c5836a7
commit dbf7ec5b15
1 changed files with 14 additions and 0 deletions

14
test/Transforms/InstCombine/cast.ll

@ -1522,3 +1522,17 @@ define i8 @pr33078_4(i3 %x) {
%D = trunc i16 %C to i8
ret i8 %D
}
; (sext (xor (cmp), -1)) -> (sext (!cmp))
define i64 @test94(i32 %a) {
; CHECK-LABEL: @test94(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i32 [[A:%.*]], -2
; CHECK-NEXT: [[TMP2:%.*]] = sext i1 [[TMP1]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp eq i32 %a, -2
%2 = sext i1 %1 to i8
%3 = xor i8 %2, -1
%4 = sext i8 %3 to i64
ret i64 %4
}