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* [Bug other/55793] New: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue)
@ 2012-12-22 19:58 jan.smets@alcatel-lucent.com
2012-12-22 20:44 ` [Bug other/55793] " jan.smets@alcatel-lucent.com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: jan.smets@alcatel-lucent.com @ 2012-12-22 19:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55793
Bug #: 55793
Summary: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking
issue)
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jan.smets@alcatel-lucent.com
Created attachment 29029
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29029
testcase
Following testcase takes a very long time to compile when debugging info is
enabled.
The 'real life' scenario contained around 900 entries.
The testcase is reduced to 500.
With more than 500 entries -> variable tracking size limit exceeded.
gcc -c test.c -o test.o -O2 -gdwarf-4 -fno-builtin
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug other/55793] Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) 2012-12-22 19:58 [Bug other/55793] New: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) jan.smets@alcatel-lucent.com @ 2012-12-22 20:44 ` jan.smets@alcatel-lucent.com 2013-01-18 11:10 ` aoliva at gcc dot gnu.org 2013-04-19 11:57 ` jan.smets@alcatel-lucent.com 2 siblings, 0 replies; 4+ messages in thread From: jan.smets@alcatel-lucent.com @ 2012-12-22 20:44 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55793 --- Comment #1 from Jan Smets <jan.smets@alcatel-lucent.com> 2012-12-22 20:44:32 UTC --- 85%+ of the time is spent in "var-tracking dataflow". This may just be a duplicate of #54402 but the testcase there is different. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug other/55793] Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) 2012-12-22 19:58 [Bug other/55793] New: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) jan.smets@alcatel-lucent.com 2012-12-22 20:44 ` [Bug other/55793] " jan.smets@alcatel-lucent.com @ 2013-01-18 11:10 ` aoliva at gcc dot gnu.org 2013-04-19 11:57 ` jan.smets@alcatel-lucent.com 2 siblings, 0 replies; 4+ messages in thread From: aoliva at gcc dot gnu.org @ 2013-01-18 11:10 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55793 Alexandre Oliva <aoliva at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |aoliva at gcc dot gnu.org --- Comment #2 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2013-01-18 11:10:08 UTC --- Is this better after the patch for var-tracking that I just checked in? (I'm not sure it's related, given that this is reported against 4.6.3, which didn't have the compile-time regression that the patch addressed, but I thought I'd ask just to be sure) ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug other/55793] Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) 2012-12-22 19:58 [Bug other/55793] New: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) jan.smets@alcatel-lucent.com 2012-12-22 20:44 ` [Bug other/55793] " jan.smets@alcatel-lucent.com 2013-01-18 11:10 ` aoliva at gcc dot gnu.org @ 2013-04-19 11:57 ` jan.smets@alcatel-lucent.com 2 siblings, 0 replies; 4+ messages in thread From: jan.smets@alcatel-lucent.com @ 2013-04-19 11:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55793 --- Comment #3 from Jan Smets <jan.smets@alcatel-lucent.com> 2013-04-19 11:57:36 UTC --- Can't confirm since the patch can not be applied to 4.6. (Even though the branch is dead already..) ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-04-19 11:57 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-12-22 19:58 [Bug other/55793] New: Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue) jan.smets@alcatel-lucent.com 2012-12-22 20:44 ` [Bug other/55793] " jan.smets@alcatel-lucent.com 2013-01-18 11:10 ` aoliva at gcc dot gnu.org 2013-04-19 11:57 ` jan.smets@alcatel-lucent.com
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