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; RUN: llvm-upgrade < %s | llvm-as | opt -basicaa -load-vn -gcse -instcombine | llvm-dis | grep 'ret i32 0'
declare void %foo(int*)
declare void %bar()
int %test() {
%A = alloca int
call void %foo(int* %A)
%X = load int* %A
tail call void %bar() ;; Cannot modify *%A because it's on the stack.
%Y = load int* %A
%Z = sub int %X, %Y
ret int %Z
}
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