[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

[amylaar 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.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21848