File: 2002-12-05-MissedConstProp.ll

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llvm 2.6-9.1
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep add

define i32 @test(i32 %A) {
        %A.neg = sub i32 0, %A          ; <i32> [#uses=1]
        %.neg = sub i32 0, 1            ; <i32> [#uses=1]
        %X = add i32 %.neg, 1           ; <i32> [#uses=1]
        %Y.neg.ra = add i32 %A, %X              ; <i32> [#uses=1]
        %r = add i32 %A.neg, %Y.neg.ra          ; <i32> [#uses=1]
        ret i32 %r
}