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[Bug tree-optimization/55011] [4.8 Regression] GCC in an infinite loop at -O2 in VRP
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 22 Oct 2012 13:26:52 +0000
- Subject: [Bug tree-optimization/55011] [4.8 Regression] GCC in an infinite loop at -O2 in VRP
- Auto-submitted: auto-generated
- References: <bug-55011-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55011
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-22 13:26:52 UTC ---
Author: rguenth
Date: Mon Oct 22 13:26:48 2012
New Revision: 192689
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192689
Log:
2012-10-22 Richard Biener <rguenther@suse.de>
PR tree-optimization/55011
* tree-vrp.c (update_value_range): For invalid lattice transitions
drop to VARYING.
* gcc.dg/torture/pr55011.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr55011.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c