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Re: [PATCH] Fix (or work around?) strength reduction reducing potentially trapping giv computation (PR rtl-optimization/24899)
- From: Richard Henderson <rth at redhat dot com>
- To: Jakub Jelinek <jakub at redhat dot com>
- Cc: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>, gcc-patches at gcc dot gnu dot org
- Date: Thu, 15 Dec 2005 13:09:23 -0800
- Subject: Re: [PATCH] Fix (or work around?) strength reduction reducing potentially trapping giv computation (PR rtl-optimization/24899)
- References: <20051215163016.GH31785@devserv.devel.redhat.com>
On Thu, Dec 15, 2005 at 11:30:16AM -0500, Jakub Jelinek wrote:
> * loop.c (strength_reduce): Don't reduce giv that is not always
> computable and where add_val or mult_val can trap.
> * gcc.c-torture/execute/20051215-1.c: New test.
Ok.
This reminds me that I should get to reviewing the kill-loop
patches that are being posted...
r~