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[Bug target/41399] [4.5 Regression] Internal error compiling fortran/intrinsic.c
- 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: 28 Jan 2010 23:22:47 -0000
- Subject: [Bug target/41399] [4.5 Regression] Internal error compiling fortran/intrinsic.c
- References: <bug-41399-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #18 from steven at gcc dot gnu dot org 2010-01-28 23:22 -------
Function that seems to cost the most time is add_functions(), which is one big
basic block of ~7500 insns (~500 of them call insns).
List scheduling is quadratic in the number of insns per basic block. I don't
know the scheduler very well, but I would expect GCC has some kind of moving
window to limit the number of insns we consider for scheduling within a basic
block. If so, then this is broken now.
That doesn't explain why only ARM seems to be hit by this, though.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41399