public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/53915] New: gcov -f rounding problem
Date: Tue, 10 Jul 2012 13:32:00 -0000	[thread overview]
Message-ID: <bug-53915-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53915

             Bug #: 53915
           Summary: gcov -f rounding problem
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: gcov-profile
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: vincent-gcc@vinc17.net


I have the following problem with gcov 4.7.1 under Debian:

ypig:/tmp/ompfr-gcov/src> gcov -f round_prec.c
Function 'mpfr_can_round_raw'
Lines executed:100.00% of 44

Function 'mpfr_can_round'
Lines executed:100.00% of 4

Function 'mpfr_prec_round'
Lines executed:100.00% of 31

Function 'mpfr_round_raw_4'
Lines executed:95.00% of 60

Function 'mpfr_round_raw_2'
Lines executed:99.99% of 9

Function 'mpfr_round_raw'
Lines executed:100.00% of 7

File 'round_prec.c'
Lines executed:100.00% of 79
Creating 'round_prec.c.gcov'

File 'round_raw_generic.c'
Lines executed:97.37% of 76
Creating 'round_raw_generic.c.gcov'

File '/usr/include/gmp-x86_64.h'
No executable lines
Removing 'gmp-x86_64.h.gcov'

See the result for Function 'mpfr_round_raw_2': 99.99% of 9. This is not
possible! Either all the lines are executed, in which case one should get 100%,
or at most 8 lines of 9 are executed, in which case one should get 88.89% at
most.

This is reproducible on a Debian/unstable amd64 machine with MPFR trunk r8346
by running the tools/coverage script.

I've also reported with bug on the Debian BTS:

  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681076


             reply	other threads:[~2012-07-10 13:32 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-10 13:32 vincent-gcc at vinc17 dot net [this message]
2012-07-10 14:27 ` [Bug gcov-profile/53915] " vincent-gcc at vinc17 dot net
2012-07-10 14:46 ` vincent-gcc at vinc17 dot net
2012-07-10 15:19 ` [Bug gcov-profile/53915] gcov can call format_gcov with top > bottom, which is unexpected vincent-gcc at vinc17 dot net
2012-07-11  7:44 ` [Bug gcov-profile/53915] gcov can call format_gcov with top > bottom, which is unexpected and gives 99.99% rguenth at gcc dot gnu.org
2012-07-22  0:15 ` steven at gcc dot gnu.org

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=bug-53915-4@http.gcc.gnu.org/bugzilla/ \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).