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Re: [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16

From: Sandra Loosemore <sandra at codesourcery dot com>
To: Richard Sandiford <rdsandiford at googlemail dot com>
Cc: <gcc-patches at gcc dot gnu dot org>, Steve Ellcey <sellcey at mips dot com>
Date: Thu, 20 Sep 2012 19:40:35 -0600
Subject: Re: [patch, mips] Fix for PR 54619, GCC aborting with -O -mips16

Re:

I think tree-ssa-loop-ivopts is simply
asking for the wrong thing, and needs to be changed.  As I say,
Sandra had some fixes in this area.

This patch:

http://gcc.gnu.org/ml/gcc-patches/2012-06/msg00319.html

Sadly, that patch has fallen off the bottom of my priority list (some legal wrangling halted all work on the Hexagon port that was the motivating example for it), and meanwhile it's become bit-rotten due to Bill Schmidt's work that touched on the ivopts code as well. If someone else would like to "adopt" this patch, please do!

I agree that it is just plain dumb for ivopts to be trying to precompute address costs for modes that are not even valid.

-Sandra

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