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Re: decrement and branch optimization broken?
- To: David Edelsohn <dje at watson dot ibm dot com>
- Subject: Re: decrement and branch optimization broken?
- From: Jan Hubicka <jh at suse dot cz>
- Date: Mon, 30 Jul 2001 11:53:09 +0200
- Cc: Roman Zippel <zippel at linux-m68k dot org>, Richard Henderson <rth at redhat dot com>, Jan Hubicka <jh at suse dot cz>, gcc at gcc dot gnu dot org, john at feith dot com
- References: <zippel@linux-m68k.org> <200107300202.WAA23824@makai.watson.ibm.com>
> PowerPC and other architecture still use the REG_NONNEG note for
> some loop patterns. It's unfortunate that this information has been made
> unusable.
Value range propagation pass should work better than not-so-easilly-maitainable
REG_NONNEG notes IMO. But the review process of that work apparently got suck
somewhere.
Honza
>
> David