------- Comment #4 from changpeng dot fang at amd dot com 2010-06-14 22:22
-------
There is nothing wrong in the prefetch itself. The problem is
__builtin_prefetch call used for prefetch instruction. Whenever,
there is a non-local lable in the current function, the __builtin_prefetch
inserted will be considered as a control flow statement:
is_ctrl_altering_stmt (gimple t)
{
....
/* A non-pure/const call alters flow control if the current
function has nonlocal labels. */
if (!(flags & (ECF_CONST | ECF_PURE)) && cfun->has_nonlocal_label) {
return true;
...
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44503
