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[Bug middle-end/34400] [4.3 regression] bad interaction between DF and SJLJ exceptions
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 19 Dec 2007 23:57:52 -0000
- Subject: [Bug middle-end/34400] [4.3 regression] bad interaction between DF and SJLJ exceptions
- References: <bug-34400-286@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #41 from steven at gcc dot gnu dot org 2007-12-19 23:57 -------
Patches attached to this bug report address more general issues, namely:
1. The LIVE problem allocates too many bitmaps (xf. df_hack2.diff)
2. Large and very connected CFGs are a time problem
Bug 26854 is another example of bad DF behavior, without SJLJ exceptions. I'm
making this bug depend on bug 26854 because bug 26854 shows there is more work
to do than just fixing the above mentioned two issues.
I suspect other problems than LIVE also allocate too many bitmaps. We badly
need a mechanism to track memory usage of DF.
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |26854
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34400