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Ping^2: ARM: More reorganization of extend patterns (PR43137)
- From: Bernd Schmidt <bernds at codesourcery dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>, Richard Earnshaw <rearnsha at arm dot com>, Paul Brook <paul at codesourcery dot com>
- Date: Tue, 24 Aug 2010 12:26:30 +0200
- Subject: Ping^2: ARM: More reorganization of extend patterns (PR43137)
- References: <4C3C383E.8060604@codesourcery.com> <4C597F88.8080509@codesourcery.com>
On 08/04/2010 04:56 PM, Bernd Schmidt wrote:
> On 07/13/2010 11:56 AM, Bernd Schmidt wrote:
>> This patch merges a number of different extend:DI patterns by using a
>> QHSI mode_iterator. It also removes separate patterns from thumb2.md as
>> we can just set attr ce_count for ARM patterns as well. I've completed
>> what I'd partially done in my previous patch, which is to remove
>> unnecessary constant pool handling from these patterns - none of them
>> accept constants.
>>
>> To fix PR43137, I've added splitters that run before the subreg2 pass.
>> In general, the ARM backend makes practically no use of lower-subreg; I
>> have given up on fixing that for the moment as it was more effort than I
>> can spare right now. Just doing it for these patterns is enough to be a
>> win in certain cases.
http://gcc.gnu.org/ml/gcc-patches/2010-07/msg01036.html
Bernd