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; With sub reassociation, constant folding can eliminate the 12 and -12 constants.
;
; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | not grep 12
define i32 @test(i32 %A, i32 %B) {
%X = add i32 -12, %A ; <i32> [#uses=1]
%Y = sub i32 %X, %B ; <i32> [#uses=1]
%Z = add i32 %Y, 12 ; <i32> [#uses=1]
ret i32 %Z
}
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