[Bug optimization/12630] [3.4 regression] Various unrecognizable insns and ICEs at -O3

["jh at suse dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12630



------- Additional Comments From jh at suse dot cz  2003-10-20 22:29 -------
Subject: Re:  [3.4 regression] Various unrecognizable insns and ICEs at -O3

> PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12630
> 
> 
> 
> ------- Additional Comments From dave at hiauly1 dot hia dot nrc dot ca  2003-10-20 22:06 -------
> Subject: Re:  [3.4 regression] Various unrecognizable
> 
> > > Switching from match_dup to match_scratch introduced a need for two
> > additional
> > > temporaries.  We only have one register in the class R1_REGS.
> > 
> > Why these two temporaries are needed?
> > R1_REGS has constraint 'a' that is not used in the pattern at all so why
> > reload chooses to use it?
> 
> I don't know.  The PA backend only uses class R1_REGS for two very specific
> situations and this isn't one of them.

Do you have any idea how can I reproduce it w/o PA machine?
(don't know much about Ada...)

Honza
> 
> Dave
> 
> 
> 
> 
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