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From: "siddhesh at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/15424] modf benchtest gives bogus results
Date: Fri, 17 May 2013 13:40:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id=15424

Siddhesh Poyarekar <siddhesh at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Siddhesh Poyarekar <siddhesh at redhat dot com> 2013-05-17 13:40:34 UTC ---
Fixed in master.

commit 48a18de1e1e7dfeab6d034765caaf732b53cfcb7
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Fri May 17 19:10:33 2013 +0530

    Prevent optimizing out of benchmark function call

    Resolves: #15424

    The compiler would optimize the benchmark function call out of the
    loop and call it only once, resulting in blazingly fast times for some
    benchmarks (notably atan, sin and cos).  Mark the inputs as volatile
    so that the code is forced to read again from the input for each
    iteration.

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