Displaying 1 result from an estimated 1 matches for "1032627".
2013 Sep 04
6
[LLVMdev] Aliasing of volatile and non-volatile
A customer has reported a performance problem, which I have eventually
tracked down to the following situation:
Consider this program:
int foo(int *p, volatile int *q, int n) {
int i, s = 0;
for (i = 0; i < n; ++i)
s += *p + *q;
return s;
}
LLVM's analysis indicates that *p and *q can alias, even though *p is
non-volatile whereas *q is volatile. I don't have the