From: "Martin Liška" <mliska@suse.cz>
To: Martin Jambor <mjambor@suse.cz>, Jan Hubicka <hubicka@ucw.cz>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Fix UBSAN errors in ipa-cp.
Date: Thu, 24 Sep 2020 09:20:55 +0200 [thread overview]
Message-ID: <c3c881cf-291c-08ca-8c51-497ca27e8060@suse.cz> (raw)
In-Reply-To: <ri6k0wkr0x5.fsf@suse.cz>
On 9/23/20 5:02 PM, Martin Jambor wrote:
> Hi,
>
> On Wed, Sep 23 2020, Martin Liška wrote:
>> There's patch that does that.
>>
>> Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
>>
>> Ready to be installed?
>> Thanks,
>> Martin
>> From ff5f78110684ed9aedde15d19e856b3acf649971 Mon Sep 17 00:00:00 2001
>> From: Martin Liska <mliska@suse.cz>
>> Date: Wed, 23 Sep 2020 15:10:43 +0200
>> Subject: [PATCH] Port IPA CP time and size to sreal
>>
>> gcc/ChangeLog:
>>
>> * ipa-cp.c (ipcp_lattice::print): Print sreal values
>> with to_double.
>> (incorporate_penalties): Change type to sreal.
>> (good_cloning_opportunity_p): Change args to sreal.
>> (get_max_overall_size): Work in sreal type.
>> (estimate_local_effects): Likewise.
>> (safe_add): Remove.
>> (value_topo_info::propagate_effects): Work in sreal type.
>> (ipcp_propagate_stage): Print sreal numbers.
>> (decide_about_value): Work in sreal type.
>> ---
>> gcc/ipa-cp.c | 128 ++++++++++++++++++++++++---------------------------
>> 1 file changed, 59 insertions(+), 69 deletions(-)
>>
>> diff --git a/gcc/ipa-cp.c b/gcc/ipa-cp.c
>> index b3e7d41ea10..9a79b5862f8 100644
>> @@ -3224,8 +3226,9 @@ incorporate_penalties (cgraph_node *node, ipa_node_params *info,
>> potential new clone in FREQUENCIES. */
>>
>> static bool
>> -good_cloning_opportunity_p (struct cgraph_node *node, int time_benefit,
>> - int freq_sum, profile_count count_sum, int size_cost)
>> +good_cloning_opportunity_p (struct cgraph_node *node, sreal time_benefit,
>> + sreal freq_sum, profile_count count_sum,
>
> Is the change of type of freq_sum intentional? Even with this patch,
> all the callers will keep passing their frequency sums as ints and so
> the implicit conversion seems a bit misleading.
>
> I guess complete transition to sreals would include also switch from
> using cgraph_edge::frequency to sreal_frequency in
> get_info_about_necessary_edges and users of struct caller_statistics.
Hello.
All right, I'm leaving that to you Martin ;) You are much more familiar
with the code base.
Martin
>
> I planned to work on conversions to sreals right after resolving various
> exchange2 issues and I can still do this bit afterwards, but the change
> in the parameter type looks like you wanted to but eventually did not?
>
> Thanks,
>
> Martin
>
>
prev parent reply other threads:[~2020-09-24 7:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 12:19 Martin Liška
2020-09-23 12:32 ` Jan Hubicka
2020-09-23 12:39 ` Martin Liška
2020-09-23 13:50 ` Martin Liška
2020-09-23 13:57 ` Jan Hubicka
2020-09-23 14:32 ` Martin Jambor
2020-09-23 15:02 ` Martin Jambor
2020-09-24 7:20 ` Martin Liška [this message]
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