From: Jeff Law <law@redhat.com>
To: Andrew Burgess <andrew.burgess@embecosm.com>,
Christophe Lyon <christophe.lyon@linaro.org>
Cc: Mike Stump <mikestump@comcast.net>,
Bernd Schmidt <bschmidt@redhat.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
Jakub Jelinek <jakub@redhat.com>
Subject: Re: Ping: Re: [PATCH 1/2] gcc: Remove unneeded global flag.
Date: Mon, 28 Nov 2016 22:09:00 -0000 [thread overview]
Message-ID: <022b1cf4-a638-1a6d-2d9f-38d9740e8f5f@redhat.com> (raw)
In-Reply-To: <20161124214002.GB4542@embecosm.com>
On 11/24/2016 02:40 PM, Andrew Burgess wrote:
> * Christophe Lyon <christophe.lyon@linaro.org> [2016-11-21 13:47:09 +0100]:
>
>> On 20 November 2016 at 18:27, Mike Stump <mikestump@comcast.net> wrote:
>>> On Nov 19, 2016, at 1:59 PM, Andrew Burgess <andrew.burgess@embecosm.com> wrote:
>>>>> So, your new test fails on arm* targets:
>>>>
>>>> After a little digging I think the problem might be that
>>>> -freorder-blocks-and-partition is not supported on arm.
>>>>
>>>> This should be detected as the new tests include:
>>>>
>>>> /* { dg-require-effective-target freorder } */
>>>>
>>>> however this test passed on arm as -freorder-blocks-and-partition does
>>>> not issue any warning unless -fprofile-use is also passed.
>>>>
>>>> The patch below extends check_effective_target_freorder to check using
>>>> -fprofile-use. With this change in place the tests are skipped on
>>>> arm.
>>>
>>>> All feedback welcome,
>>>
>>> Seems reasonable, unless a -freorder-blocks-and-partition/-fprofile-use person thinks this is the wrong solution.
>>>
>>
>> Hi,
>>
>> As promised, I tested this patch: it makes
>> gcc.dg/tree-prof/section-attr-[123].c
>> unsupported on arm*, and thus they are not failing anymore :-)
>>
>> However, it also makes other tests unsupported, while they used to pass:
>>
>> gcc.dg/pr33648.c
>> gcc.dg/pr46685.c
>> gcc.dg/tree-prof/20041218-1.c
>> gcc.dg/tree-prof/bb-reorg.c
>> gcc.dg/tree-prof/cold_partition_label.c
>> gcc.dg/tree-prof/comp-goto-1.c
>> gcc.dg/tree-prof/pr34999.c
>> gcc.dg/tree-prof/pr45354.c
>> gcc.dg/tree-prof/pr50907.c
>> gcc.dg/tree-prof/pr52027.c
>> gcc.dg/tree-prof/va-arg-pack-1.c
>>
>> and failures are now unsupported:
>> gcc.dg/tree-prof/cold_partition_label.c
>> gcc.dg/tree-prof/section-attr-1.c
>> gcc.dg/tree-prof/section-attr-2.c
>> gcc.dg/tree-prof/section-attr-3.c
>>
>> So, maybe this patch is too strong?
>
> In all of the cases that used to pass the tests are compile only tests
> (except for cold_partition_label, which I discuss below).
>
> On ARM passing -fprofile-use and -freorder-blocks-and-partition
> results in a warning, and the -freorder-blocks-and-partition flag is
> ignored. However, disabling -freorder-blocks-and-partition doesn't
> stop any of the tests compiling, hence the passes.
>
> All the tests include:
>
> /* { dg-require-effective-target freorder } */
>
> which I understand to mean, the tests requires the 'freorder' feature
> to be supported (which corresponds to -freorder-blocks-and-partition).
>
> For cold_partition_label and my new tests it's seems clear that the
> lack of support for -freorder-blocks-and-partition on ARM is the cause
> of the test failures.
>
> So, is it reasonable to give up the other tests as "unsupported"? I'd
> be inclined to say yes, but I happy to rework the patch if anyone has
> a suggestion for an alternative approach.
It is reasonable. It's not uncommon to have to drop various tests to
UNSUPPORTED, particularly things which depend on assembler/linker
capabilities, the target runtime system, etc.
jeff
next prev parent reply other threads:[~2016-11-28 22:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-10 16:56 [PATCH 0/2] Remove user_defined_section_attribute global Andrew Burgess
2016-06-10 16:56 ` [PATCH 1/2] gcc: Remove unneeded global flag Andrew Burgess
2016-06-22 2:55 ` Jeff Law
2016-06-22 6:02 ` Jakub Jelinek
2016-06-29 19:33 ` Andrew Burgess
2016-09-14 13:05 ` Ping: " Andrew Burgess
2016-09-14 13:08 ` Jakub Jelinek
2016-09-15 14:30 ` Andrew Burgess
2016-10-28 15:58 ` Jeff Law
2016-10-28 16:15 ` Andrew Burgess
2016-11-03 12:01 ` Bernd Schmidt
2016-11-16 20:09 ` Andrew Burgess
2016-11-16 21:00 ` Mike Stump
2016-11-16 22:12 ` Andrew Burgess
2016-11-17 17:59 ` Jeff Law
2016-11-18 12:22 ` Christophe Lyon
2016-11-19 21:59 ` Andrew Burgess
2016-11-20 17:27 ` Mike Stump
2016-11-21 12:47 ` Christophe Lyon
2016-11-24 21:40 ` Andrew Burgess
2016-11-28 22:09 ` Jeff Law [this message]
2016-11-29 14:03 ` Andrew Burgess
2016-11-29 17:36 ` Jeff Law
2016-11-30 11:40 ` Andrew Burgess
2016-06-10 16:57 ` [PATCH 2/2] gcc: Update comment in bb-reorder.c Andrew Burgess
2016-06-22 2:59 ` Jeff Law
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=022b1cf4-a638-1a6d-2d9f-38d9740e8f5f@redhat.com \
--to=law@redhat.com \
--cc=andrew.burgess@embecosm.com \
--cc=bschmidt@redhat.com \
--cc=christophe.lyon@linaro.org \
--cc=gcc-patches@gcc.gnu.org \
--cc=jakub@redhat.com \
--cc=mikestump@comcast.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).