[Bug c++/26399] New: -fprofile-use fails with unnamed namespaces in 4.1.0 prerelease

[Bug c++/26399] New: -fprofile-use fails with unnamed namespaces in 4.1.0 prerelease

[strieder at informatik dot uni-kl dot de]

Hello,

the problem seems to have returned, similar problems have been reported several
times at least in the 4.0.0 prerelease time, as far as Google tells.

See

gcc.gnu.org/ml/gcc/2005-03/msg00844.html 
http://kegel.com/crosstool/crosstool-0.38/patches/gcc-4.0.1/pr20815-fix.patch

I have a larger code base, where the compiler bails out at every first
occurence of unnamed
namespaces with -fprofile-use. The working files get a remarkable speedup due
to profile-use,
so I would prefer to be able to use it for all files without having to assign
the namespaces
names. I can get away  for the moment by compiling the failing files without
-fprofile-use.

Thanks,

Bernd Strieder



proft1.cc:
------------------------------------------------------
namespace {

int calc(int j)
{
  if (j==0) return 0;
  return calc(j-1)*j % 17;
}

}

int main(void)
{
  return calc(25);
}
--------------------------

Steps to reproduce:

g++ -fprofile-generate -c proft1.cc    
g++ -fprofile-generate -o proft1 proft1.o 
./proft1
g++ -fprofile-use -c proft1.cc 
proft1.cc: In function 'int<unnamed>::calc(int)':
proft1.cc:13: error: coverage mismatch for function
'_ZN38_GLOBAL__N_proft1.cc_00000000_DA7CA6ED4calcEi' while reading counter
'arcs'
proft1.cc:13: error: checksum is 2c81fd4d instead of dd8ba62c


-- 
           Summary: -fprofile-use fails with unnamed namespaces in 4.1.0
                    prerelease
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: strieder at informatik dot uni-kl dot de
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces in 4.1.0 prerelease

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-02-21 16:59 -------
2005-10-31  Jan Hubicka  <jh@suse.cz>

        PR profile/20815
        * coverage.c (coverage_checksum_string): Fix code to stip random seeds
        from symbol names while computing checkup.

The patch which you referenced was applied.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces in 4.1.0 prerelease

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-02-21 17:00 -------
But still fails.

Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-21 17:00:58
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces in 4.1.0 prerelease

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2006-02-22 11:30 -------
Providing -frandom-seed=0 is a workaround.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces

[hjl at lucon dot org]

------- Comment #4 from hjl at lucon dot org  2006-04-03 21:54 -------
If -frandom-seed=0 is required for -fprofile-use to work correctly, why not
add it automatically for -fprofile-use?


-- 

hjl at lucon dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl at lucon dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces

[hubicka at gcc dot gnu dot org]

------- Comment #5 from hubicka at gcc dot gnu dot org  2006-04-06 20:33 -------
Subject: Bug 26399

Author: hubicka
Date: Thu Apr  6 20:33:21 2006
New Revision: 112738

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112738
Log:

        PR profile/20815
        PR profile/26399
        * coverage.c (coverage_checksum_string): Reorganize loop to not read
        after buffer.
        * g++.dg/bprob/g++-bprob-2.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/bprob/g++-bprob-2.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/coverage.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov/profile/26399] -fprofile-use fails with unnamed namespaces

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-04-15 16:47 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov-profile/26399] -fprofile-use fails with unnamed namespaces

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2006-09-04 16:16 -------
*** Bug 28948 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bangerth at dealii dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov-profile/26399] -fprofile-use fails with unnamed namespaces

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2008-12-31 19:48 -------
*** Bug 32316 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |patrick dot pastoor at
                   |                            |onespin-solutions dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399

[Bug gcov-profile/26399] -fprofile-use fails with unnamed namespaces

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2009-01-14 23:14 -------
*** Bug 25351 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |cyberax at elewise dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26399