llvm-6502/test/Transforms/Reassociate/negation.ll

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; RUN: opt < %s -reassociate -instcombine -S | not grep sub
; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
define i32 @test1(i32 %a, i32 %b, i32 %z) {
%c = sub i32 0, %z ; <i32> [#uses=1]
%d = mul i32 %a, %b ; <i32> [#uses=1]
%e = mul i32 %c, %d ; <i32> [#uses=1]
%f = mul i32 %e, 12345 ; <i32> [#uses=1]
%g = sub i32 0, %f ; <i32> [#uses=1]
ret i32 %g
}
define i32 @test2(i32 %a, i32 %b, i32 %z) {
%d = mul i32 %z, 40 ; <i32> [#uses=1]
%c = sub i32 0, %d ; <i32> [#uses=1]
%e = mul i32 %a, %c ; <i32> [#uses=1]
%f = sub i32 0, %e ; <i32> [#uses=1]
ret i32 %f
}