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; RUN: llvm-upgrade < %s | llvm-as | opt -reassociate -gcse -instcombine | llvm-dis | not grep add
%a = weak global int 0
%b = weak global int 0
%c = weak global int 0
%d = weak global int 0
implementation
int %foo() {
%tmp.0 = load int* %a
%tmp.1 = load int* %b
%tmp.2 = add int %tmp.0, %tmp.1 ; (a+b)
%tmp.4 = load int* %c
%tmp.5 = add int %tmp.2, %tmp.4 ; (a+b)+c
%tmp.8 = add int %tmp.0, %tmp.4 ; (a+c)
%tmp.11 = add int %tmp.8, %tmp.1 ; (a+c)+b
%RV = xor int %tmp.5, %tmp.11 ; X ^ X = 0
ret int %RV
}
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