http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49721
--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> 2011-08-02 19:29:12
UTC ---
combine.c has
/* Allocate array for insn info. */
max_uid_known = get_max_uid ();
uid_log_links = XCNEWVEC (struct insn_link *, max_uid_known + 1);
uid_insn_cost = XCNEWVEC (int, max_uid_known + 1);
gcc_obstack_init (&insn_link_obstack);
combine isn't prepared to deal with new insns generated by
convert_memory_address_addr_space and it accesses invalid
memory in
FOR_EACH_LOG_LINK (link, temp)
if (link->insn == i2)
link->insn = i3;
on those newly generated insns.
