http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45871
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |UNCONFIRMED
Last reconfirmed|2010-10-03 19:42:33 |
Target Milestone|4.6.0 |---
Summary|[4.6 Regression] lto |lto bootstrap miscompiles
|bootstrap miscompiles |expmed.c
|expmed.c |
Ever Confirmed|1 |0
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> 2010-10-03
22:07:00 UTC ---
The problem is that we have
MEM[ptr+24].predicate access, where ptr is isnsn_code[2000].
The reference really access insn_code[2001].predicate, but since
get_base_constructor handle ARRAY_REF by calling fold_const_aggregate_ref that
return constructor of insn_code[2000] only, we don't find matching field while
looking for field at offset 24.
I am testing patch that makes get_base_constructor to use
get_ref_base_and_extent and simply adjust the offset of outer reference
accordingly to fix this.
Honza
