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[Bug tree-optimization/34683] [4.3 Regression] Fortran FE generated IL pessimizes middle-end IL and analysis
- From: "jaydub66 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 Jan 2008 09:38:21 -0000
- Subject: [Bug tree-optimization/34683] [4.3 Regression] Fortran FE generated IL pessimizes middle-end IL and analysis
- References: <bug-34683-14773@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #36 from jaydub66 at gmail dot com 2008-01-09 09:38 -------
> How does the trunk compare now to the numbers mentioned in comment #16 ?
Compiling with rev. 131414 gives:
-O1 -fstrict-aliasing: 33sec, 438197 kB
-O2: 97sec, 669637 kB
-O3: 50sec, 392669 kB
This is of course better than a few days ago (thanks to Richard's patches). But
it's not even close to the numbers in comment #16.
What worries me about this is not the 33sec compile time (I could live with
that, if I'd have to), but the really large amount of memory. On a machine with
only 256MB compiling takes several minutes, due to massive swapping.
Richard:
You said that the remaining issue is probably not gonna be fixed for 4.3. I
don't quite see the reason for this, since this apparently *was* fixed at some
point in the 4.3 trunk (see comment 16).
Also this would really be a shame since it would make GCC 4.3 practically
unusable for our project (http://gibuu.physik.uni-giessen.de/GiBUU/).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34683