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Re: a patch for PR68695
- From: Christophe Lyon <christophe dot lyon at linaro dot org>
- To: Vladimir Makarov <vmakarov at redhat dot com>
- Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Wed, 30 Mar 2016 23:23:26 +0200
- Subject: Re: a patch for PR68695
- Authentication-results: sourceware.org; auth=none
- References: <56FAAD47 dot 8090300 at redhat dot com>
On 29 March 2016 at 18:28, Vladimir Makarov <vmakarov@redhat.com> wrote:
> The following patch improves the code in 2 out of 3 cases in
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68695
>
> The patch uses more accurate costs for the RA cost improvement
> optimization after colouring.
>
> The patch was tested and bootstrapped on x86-64. It is hard to create a
> test to check the correct code generation. Therefore there is no test. As
> the patch changes heuristics, a generated code in some cases will be
> different but at least x86-64 tests expecting a specific code are not broken
> by the patch.
>
> Committed as rev. 234527
>
Hi,
I've noticed that after this patch, 2 tests regress (PASS -> FAIL) on arm:
gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump pro_and_epilogue
"Performing shrink-wrapping"
gcc.dg/pr10474.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping"
Christophe