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[Bug rtl-optimization/21848] [4.1 Regression] load_mems / replace_loop_mems bug causes miscompilation of jcf-io.c / SEGV while processing java/lang/AbstractMethodError
- From: "amylaar at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Jun 2005 13:06:07 -0000
- Subject: [Bug rtl-optimization/21848] [4.1 Regression] load_mems / replace_loop_mems bug causes miscompilation of jcf-io.c / SEGV while processing java/lang/AbstractMethodError
- References: <20050531200902.21848.amylaar@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From amylaar at gcc dot gnu dot org 2005-06-20 13:05 -------
(In reply to comment #4)
> 2005-05-31 Pat Haugen <pthaugen@us.ibm.com>
>
> * loop.c (loop_invariant_p, valid_initial_value_p): Revert last
> change.
>
>
> The last change was:
> 2005-05-30 Pat Haugen <pthaugen@us.ibm.com>
>
> * loop.c (loop_invariant_p, valid_initial_value_p): Use
> regs_invalidated_by_call instead of call_used_regs.
>
The failure that I analyzed involved killing stores to memory, not fixed
registers. Therefore, the underlying problem has not been fixed, it has
only become latent (again?). I don't think we should daclare a latent
wrong-code bug as fixed. We might change the severity amd/or priority,
though.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21848