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; With sub reassociation, constant folding can eliminate the two 12 constants.
;
; RUN: llvm-upgrade < %s | llvm-as | opt -reassociate -constprop -dce | llvm-dis | not grep 12
int "test"(int %A, int %B, int %C, int %D) {
%M = add int %A, 12
%N = add int %M, %B
%O = add int %N, %C
%P = sub int %D, %O
%Q = add int %P, 12
ret int %Q
}
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