llvm-project/llvm/test/Transforms/Reassociate/mul-neg-add.ll

11 lines
285 B
LLVM

; RUN: opt < %s -reassociate -instcombine -S |\
; RUN: not grep {sub i32 0}
define i32 @test(i32 %X, i32 %Y, i32 %Z) {
%A = sub i32 0, %X ; <i32> [#uses=1]
%B = mul i32 %A, %Y ; <i32> [#uses=1]
; (-X)*Y + Z -> Z-X*Y
%C = add i32 %B, %Z ; <i32> [#uses=1]
ret i32 %C
}