[Bug lto/41230] [LTO] Segfault using -flto with -fvar-tracking-assignments

[ubizjak at gmail dot com]

------- Comment #7 from ubizjak at gmail dot com  2009-09-03 08:53 -------
(In reply to comment #3)
> Hmm, dropping the stmt looks like it would be a "hack".  Alex - if I just set
> flag_var_tracking_assignments to 1 if I encounter a GIMPLE_DEBUG during read-in
> I get
> 
> t.c: In function 'foo':
> t.c:1:6: error: unrecognizable insn:
> (debug_insn 6 5 14 t.c:3 (var_location:SI hex (mem/c/i:SI (plus:SI (reg/f:SI 20
> frame)
>             (const_int -4 [0xfffffffc])) [0 hex+0 S4 A32])) -1 (nil))
> t.c:1:6: internal compiler error: in insn_default_length, at
> config/i386/i386.md:544
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
> 
> is there sth else that I need to do to "enable" VTA?

You should use NONDEBUG_INSN_P instead of INSN_P somewhere. Backtrace will tell
you where. I have similar problem on alpha, see perhaps PR 41238.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41230