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[Bug c/48228] incorrect signed overflow warning when only 0 and 1 are used
- 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: Tue, 22 Mar 2011 12:40:33 +0000
- Subject: [Bug c/48228] incorrect signed overflow warning when only 0 and 1 are used
- Auto-submitted: auto-generated
- References: <bug-48228-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48228
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-22 12:40:16 UTC ---
Author: rguenth
Date: Tue Mar 22 12:40:09 2011
New Revision: 171287
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171287
Log:
2011-03-22 Richard Guenther <rguenther@suse.de>
PR tree-optimization/48228
* tree-vrp.c (vrp_visit_phi_node): Do not stop propagating
for single-arg PHIs.
* gcc.dg/Wstrict-overflow-23.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-23.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c