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From: Krishna Narayanan <krishnanarayanan132002@gmail.com>
Date: Wed, 23 Feb 2022 00:00:47 +0530
Message-ID: <CABhGnjtWdGCoV_ySUmaPMKRdcFdasta9UfQYGLRN2AVSjEgr_w@mail.gmail.com>
Subject: Re: Doubt regarding dg-directives
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Jonathan Wakely <jwakely.gcc@gmail.com>, gcc-help <gcc-help@gcc.gnu.org>
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On Tue, Feb 22, 2022 at 9:16 PM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> On Tue, Feb 22, 2022 at 09:08:40PM +0530, Krishna Narayanan via Gcc-help wrote:
> > Yes, it does.
> > I used dg-warning and not dg warning (that was a sheer typing mistake).
> > The warning is about the uninitialized variable being used in the
> > testcase yet there is no warning on that line and the test results in
> > FAIL.
> > I used /* { dg-warning "uninitialized" } */ on that particular line.I
> > used the test in gcc.dg, with other directive /* { dg-options "-O2" }
> > */ .
> > Can you help me where I went wrong?
>
> Please send the verbatim testcase (and don't top-post please).  Guessing
> is a fun game sometimes, but more often it is just frustrating.
/* { dg-do compile } */
/* { dg-options "-O2" } */
 int test(int y) {
    int z;
    int x;
    int a;
    for (x = 0; x < 10; x = x + 1, y = y + 1,a = a + 1)
    {
        if (y < 10) {
            z = z + 1 + a; /* { dg-warning "uninitialized" } */
        }
    }
    return z;
}
Here is the test case,I apologize for the inconvenience caused earlier
due to indirect context.
Thanks,
Krishna Narayanan.