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Re: [PATCH][AArch64] Improve bit-test-branch pattern to avoid unnecessary register clobber
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Jiong Wang <jiong dot wang at arm dot com>
- Cc: Ramana Radhakrishnan <Ramana dot Radhakrishnan at arm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Richard Henderson <rth at redhat dot com>, Marcus Shawcroft <Marcus dot Shawcroft at arm dot com>
- Date: Tue, 27 Jan 2015 15:35:02 +0100
- Subject: Re: [PATCH][AArch64] Improve bit-test-branch pattern to avoid unnecessary register clobber
- Authentication-results: sourceware.org; auth=none
- References: <548EFFE8 dot 9040703 at arm dot com> <54B6F4BE dot 2000200 at redhat dot com> <54BCDC5F dot 6090301 at arm dot com> <20150119103410 dot GE1405 at tucnak dot redhat dot com> <CAJA7tRY=qcMMcG6VkrOU6Wq_zcc0Y+qh6KDhtzoXkkx=7Ck2Eg at mail dot gmail dot com> <20150119105834 dot GF1405 at tucnak dot redhat dot com> <54C7A132 dot 7090502 at arm dot com>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Tue, Jan 27, 2015 at 02:31:14PM +0000, Jiong Wang wrote:
> testcase changed to execution version, and moved to gcc.dg. the compile time only
> take several seconds. (previously I am using cc1 built by O0 which at most take 24s)
>
> ok to install?
Ok for the testcase.
The config/aarch64/ bits I'll defer to aarch64 maintainers.
> 2015-01-19 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
> Jiong Wang <jiong.wang@arm.com>
>
> gcc/
> * config/aarch64/aarch64.md (tb<optab><mode>1): Clobber CC reg instead of scratch reg.
> (cb<optab><mode>1): Likewise.
> * config/aarch64/iterators.md (bcond): New define_code_attr.
>
> gcc/testsuite/
> * gcc.dg/long_branch.c: New testcase.
Jakub