On Wed, Sep 19, 2012 at 10:53:00AM +0200, Richard Guenther wrote:
> + extern void abort (void);
> + void foo(char *p, int n)
> + {
> + int i;
> + for (i = 1; i < n; i++)
> + p[i] = p[i - 1];
You could turn this into if (n > 1) memset (p + 1, p[0], n - 1); if you wanted,
though of course th
This fixes PR54132 where loop distribution pattern matching thinks
that every loop that copies contiguous memory regions and has
a dependence between input and output can be representet by a memmove.
Not. Obviously.
Thus, fixed by doing proper dependence checks.
Bootstrapped and tested on x86_6
