------- Comment #4 from ubizjak at gmail dot com 2010-06-09 06:27 -------
(In reply to comment #1)
> It may be broken by revision 160394:
>
> http://gcc.gnu.org/ml/gcc-cvs/2010-06/msg00307.html
The add->lea transformation doesn't even trigger in this testcase... You still
have normal add instruction with a flags clobber up to and including sched2
pass.
Later, compilation breaks in machine reorg pass with:
Program received signal SIGSEGV, Segmentation fault.
distance_non_agu_define (code=<value optimized out>, insn=0x7ffff18c2750,
operands=0x1298aa0) at ../../gcc-svn/trunk/gcc/config/i386/i386.c:13826
13826 if (insn != BB_HEAD (bb))
(gdb) l
13821 basic_block bb = BLOCK_FOR_INSN (insn);
13822 int distance = 0;
13823 df_ref *def_rec;
13824 enum attr_type insn_type;
13825
13826 if (insn != BB_HEAD (bb))
13827 {
13828 rtx prev = PREV_INSN (insn);
13829 while (prev && distance < LEA_SEARCH_THRESHOLD)
13830 {
It looks to me that bb is NULL, which isn't a good sign anyway.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44470
