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[Bug tree-optimization/34683] [4.3 Regression] Fortran FE generated IL pessimizes middle-end IL and analysis
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jan 2008 14:32:05 -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 #19 from rguenth at gcc dot gnu dot org 2008-01-07 14:32 -------
-fno-tree-loop-optimize reduces compile-time of this testcase from 117s to 35s
with -O -fstrict-aliasing. try_unroll_loop_completely calls update_ssa, for
every loop unrolled, added by r98599, which seems to be necessary - mainly
because
of the interesting PHI redirect re-use of PENDING_STMT.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34683