From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-369048-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 23337 invoked by alias); 30 May 2014 23:51:20 -0000
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Received: (qmail 23328 invoked by uid 89); 30 May 2014 23:51:19 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-yh0-f46.google.com
Received: from mail-yh0-f46.google.com (HELO mail-yh0-f46.google.com) (209.85.213.46) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Fri, 30 May 2014 23:51:18 +0000
Received: by mail-yh0-f46.google.com with SMTP id 29so2202947yhl.19        for <gcc-patches@gcc.gnu.org>; Fri, 30 May 2014 16:51:16 -0700 (PDT)
X-Received: by 10.236.47.201 with SMTP id t49mr26143588yhb.123.1401493876550; Fri, 30 May 2014 16:51:16 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.170.122.2 with HTTP; Fri, 30 May 2014 16:50:36 -0700 (PDT)
In-Reply-To: <CAO2gOZXPsoRetjgWtATwAqj0FGAbH59S_+-bQAm1Lstx6WHSZA@mail.gmail.com>
References: <CAO2gOZXPsoRetjgWtATwAqj0FGAbH59S_+-bQAm1Lstx6WHSZA@mail.gmail.com>
From: Steven Bosscher <stevenb.gcc@gmail.com>
Date: Fri, 30 May 2014 23:51:00 -0000
Message-ID: <CABu31nMw7SDfPTAB5Xy8fbUCFJzKt9Ng7LfPZpLarKrNeCJATg@mail.gmail.com>
Subject: Re: [PATCH] Updates merged bb count
To: Dehao Chen <dehao@google.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>, Jan Hubicka <hubicka@ucw.cz>
Content-Type: text/plain; charset=UTF-8
X-IsSubscribed: yes
X-SW-Source: 2014-05/txt/msg02663.txt.bz2

On Fri, May 30, 2014 at 11:43 PM, Dehao Chen wrote:
> Index: gcc/testsuite/gcc.dg/tree-prof/merge_block.c
> ===================================================================
> --- gcc/testsuite/gcc.dg/tree-prof/merge_block.c (revision 0)
> +++ gcc/testsuite/gcc.dg/tree-prof/merge_block.c (revision 0)
> @@ -0,0 +1,20 @@
> +
> +/* { dg-options "-O2 -fno-ipa-pure-const
> -fdump-tree-optimized-blocks-details -fno-early-inlining" } */
> +int a[8];
> +int t()
> +{
> + int i;
> + for (i = 0; i < 3; i++)
> + if (a[i])
> + break;
> + return i;
> +}
> +main ()
> +{
> +  int i;
> +  for (i = 0; i < 1000; i++)
> +    t ();
> +  return 0;
> +}
> +/* { dg-final-use { scan-tree-dump-not "Invalid sum" "optimized"} } */
> +/* { dg-final-use { cleanup-tree-dump "optimized" } } */


I suppose you want to avoid having t() inlined into main()? If so,
then I'd suggest adding __attribute__((__noinline__,__noclone__)) to
"robustify" the test case.

Ciao!
Steven