[Bug c/44700] New: Internal error (case derived from netpbm)

[michael at talamasca dot ocis dot net]

I've experienced an internal compiler error attempting to compile
netpbm-10.35.75 under -Os optimization.  I've reduced the problem file
(pamscale.c) down to a minimal example:

Script started on Mon Jun 28 10:15:13 2010
bash-4.1$ cat break-gcc.i
extern int bar(void);

int foo(float f, int i)
{
    return f * 2 < i || bar();
}
bash-4.1$ gcc -c -Os -ffast-math break-gcc.i
break-gcc.i: In function 'foo':
break-gcc.i:6:1: error: unrecognizable insn:
(jump_insn 39 41 12 2 break-gcc.i:5 (set (pc)
        (if_then_else (lt (reg:CCFP 17 flags)
                (const_int 0 [0x0]))
            (label_ref:SI 18)
            (pc))) -1 (expr_list:REG_BR_PROB (const_int 6102 [0x17d6])
        (nil))
 -> 18)
break-gcc.i:6:1: internal compiler error: in extract_insn, at recog.c:2103
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
bash-4.1$ exit
exit

Script done on Mon Jun 28 10:15:35 2010

-Os and -ffast-math are both essential to trigger the bug.


-- 
           Summary: Internal error (case derived from netpbm)
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: michael at talamasca dot ocis dot net
 GCC build triplet: i386-pc-linux-uclibc
  GCC host triplet: i386-pc-linux-uclibc
GCC target triplet: i386-pc-linux-uclibc


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44700