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Title:
[PR38292] corrupted profile info with -O[23] -fprofile-use
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Marked as wont-fix as the compiler is working as designed.
** Changed in: gcc-linaro
Status: Triaged = Won't Fix
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https://bugs.launchpad.net/bugs/598462
Title:
[PR38292]
** Changed in: gcc-linaro
Status: New = Triaged
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Title:
[PR38292] corrupted profile info with -O[23] -fprofile-use
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It turns out there is no other problem on 4.6. The compiler in the
ubuntu-toolchain-r/test ppa does not build Python at all due to PR
47271. After adding the fix for this PR to the ppa package, the
compiler runs into the exact same problem as described for 4.5 in the
previous comment. By using
I've now reproduced and analyzed the problem on i386 with GCC 4.5, i.e.
building python3.2-3.2~rc1 using the 4.5.1-1ubuntu3 compiler.
It turns out that there is no particular bug here (the CFG looks
identical in the -fprofile-generate and -fprofile-use cases), but
instead we're running in a known
16-17 thought to be 5657524
make[3]: *** [Python/thread.o] Error 1
Reply at: https://bugs.launchpad.net/gcc/+bug/598462/comments/0
On 2009-02-04T19:51:13+00:00 Jakub-gcc wrote:
Subject: Bug 38292
Author: jakub
Date: Wed Feb
updated PR38292, still seen with trunk and the proposed fix for
PR47271.
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Title:
[PR38292] corrupted profile info with -O[23] -fprofile-use
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with gcc-4.6 from the ~ubuntu-toolchain-r/test PPA I get (with the just
built python (built with -fprofile-generate):
build-static$ ./python
XXX lineno: 1101, opcode: 0
Fatal Python error: Py_Initialize: Unable to get the locale encoding
Traceback (most recent call last):
File
no, normal python build fails too, this is reported as upstream bug
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47271
** Bug watch added: GCC Bugzilla #47271
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47271
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the just uploaded python3.2_3.2~rc1-1ubuntu1 fails with the current
Ubuntu/Linaro gcc-4.5 in natty on amd64, i386 and powerpc. armel is the
only architecture which seems to build.
Building with gcc-4.6 from the ubuntu-toolchain-r/test ppa fails to
build while running the setup.py with the just
no, 4.4 is not interesting anymore for this issue.
** Changed in: gcc-4.4 (Ubuntu)
Status: Confirmed = Won't Fix
** Changed in: gcc-4.5 (Ubuntu)
Status: New = Confirmed
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I just successfully completed a profiled build of python3.2_3.2~b2-1.dsc
on armel Natty using the Ubuntu/Linaro 4.5.1-10ubuntu3 system compiler,
so the problem seems to no longer exist on 4.5.
Do we still care about 4.4 at this point?
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** Also affects: gcc-4.5 (Ubuntu)
Importance: Undecided
Status: New
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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Note that this is not Linaro specific, but we plan to get PGO working for ARM
this cycle:
https://blueprints.launchpad.net/gcc-linaro/+spec/profiler-driven-feedback
Medium priority so might happen.
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[PR38292] corrupted profile info with -O[23] -fprofile-use
(Not a Linaro-specific regression)
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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no change on armel:
http://launchpadlibrarian.net/55247507/buildlog_ubuntu-maverick-
armel.python3.2_3.2~a2-1ubuntu1~ppa2_FAILEDTOBUILD.txt.gz
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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** Also affects: gcc-linaro
Importance: Undecided
Status: New
** Changed in: gcc-linaro
Importance: Undecided = Low
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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may turn into a blueprint on implementing profile guided optimization
** Changed in: gcc-4.4 (Ubuntu)
Status: New = Confirmed
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[PR38292] corrupted profile info with -O[23] -fprofile-use
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failed armel build (from ppa:doko/toolchain):
http://launchpadlibrarian.net/51573890/buildlog_ubuntu-maverick-armel.python3.2_3.2~~20100707-0ubuntu2_FAILEDTOBUILD.txt.gz
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
You received this bug
Fails on amd64 too, building _ssl.c
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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Public bug reported:
Binary package hint: gcc-4.4
seen with a profiled build (make profile-opt
PROFILE_TASK='$(srcdir)/Lib/test/regrtest.py') building python-3.0rc3 on
i486-linux-gnu. Using pybench as the PROFILE_TASK doesn't show this bug).
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O2
tagging for armel (but not specific for armel). the current python2.6
build in maverick does build, but not python3.1 when using the profiled
build.
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[PR38292] corrupted profile info with -O[23] -fprofile-use
https://bugs.launchpad.net/bugs/598462
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** Changed in: gcc
Status: Unknown = New
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[PR38292] corrupted profile info with -O[23] -fprofile-use
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