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From: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
To: Richard Biener <richard.guenther@gmail.com>
Cc: "Martin Liška" <mliska@suse.cz>,
	"GCC Patches" <gcc-patches@gcc.gnu.org>,
	"Eric Botcazou" <ebotcazou@adacore.com>,
	"Jakub Jelinek" <jakub@redhat.com>,
	"Bernhard Reutner-Fischer" <rep.dot.nop@gmail.com>
Subject: Re: [PATCH] Come up with debug counter for store-merging.
Date: Thu, 19 Sep 2019 14:57:00 -0000	[thread overview]
Message-ID: <20190919165737.14ccca59@nbbrfq.loc> (raw)
In-Reply-To: <CAFiYyc079H74XUfSwKc54rVkd+L35uEPJa8LotY47Khxs18jOg@mail.gmail.com>

On Wed, 18 Sep 2019 11:01:59 +0200
Richard Biener <richard.guenther@gmail.com> wrote:

> On Wed, Sep 18, 2019 at 9:22 AM Martin Liška <mliska@suse.cz> wrote:
> >
> > Hi.
> >
> > After I spent quite some time with PR91758, I would like
> > to see a debug counter in store merging for the next time.
> >
> > Ready to be installed?  
> OK.

> @@ -4195,7 +4196,8 @@ imm_store_chain_info::output_merged_stores ()
>    bool ret = false;
>    FOR_EACH_VEC_ELT (m_merged_store_groups, i, merged_store)
>      {
> -      if (output_merged_store (merged_store))
> +      if (dbg_cnt (store_merging)
> +	  && output_merged_store (merged_store))

Doesn't this over-count actual merged stores? You really count the number of attempted store merges, not the actual successful stores merged. As i would expect to count the latter, i would have expected ..

>  	{
>  	  unsigned int j;
>  	  store_immediate_info *store;

dbg_cnt (store_merging) here, i.e. after the guard that determines if
the merge is benefical, no?

thanks,

  reply	other threads:[~2019-09-19 14:57 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-18  7:22 Martin Liška
2019-09-18  9:02 ` Richard Biener
2019-09-19 14:57   ` Bernhard Reutner-Fischer [this message]
2019-09-20  7:50     ` Martin Liška

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