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[Bug rtl-optimization/53125] Very slow register allocation on SPARC
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 10 May 2012 22:17:36 +0000
- Subject: [Bug rtl-optimization/53125] Very slow register allocation on SPARC
- Auto-submitted: auto-generated
- References: <bug-53125-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53125
--- Comment #6 from Steven Bosscher <steven at gcc dot gnu.org> 2012-05-10 22:17:36 UTC ---
Created attachment 27369
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27369
Compute REG_LIVE_LENGTH smarter
The way local_live is used to compute REG_LIVE_LENGTH is just stupid.
Something like this patch would be helpful (drops from 73s after Vlad's patch
to 39s).
A complete version of this should also handle MW-hardregs.