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[Bug tree-optimization/18792] ICE with -O1 -ftree-loop-linear on small test case
- From: "rakdver at atrey dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Dec 2004 22:53:28 -0000
- Subject: [Bug tree-optimization/18792] ICE with -O1 -ftree-loop-linear on small test case
- References: <20041202193143.18792.fjahanian@apple.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-12-07 22:53 -------
Subject: Re: ICE with -O1 -ftree-loop-linear on small test case
> There are basically two ways how to fix this: either make the code
> that changes the order of loops in the nests to also renumber the loops
> (which would in turn invalidate all scev caches, that would need to be
> flushed). Or fix the code that assumes the ordering of the loops.
Sorry for a bit missleading formulation -- the later solution does not
avoid need for flushing the scev caches when the "linear" pass changes
order of loops; the data are invalidated anyway.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18792