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[Bug c++/55095] Wshift-overflow
- From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 12 Aug 2015 17:25:54 +0000
- Subject: [Bug c++/55095] Wshift-overflow
- Auto-submitted: auto-generated
- References: <bug-55095-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55095
--- Comment #19 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Aug 12 17:25:23 2015
New Revision: 226826
URL: https://gcc.gnu.org/viewcvs?rev=226826&root=gcc&view=rev
Log:
PR c++/55095
* c-common.c (maybe_warn_shift_overflow): Properly handle
left-shifting 1 into the sign bit.
* c-c++-common/Wshift-overflow-6.c: New test.
* c-c++-common/Wshift-overflow-7.c: New test.
* g++.dg/cpp1y/left-shift-2.C: New test.
Added:
trunk/gcc/testsuite/c-c++-common/Wshift-overflow-6.c
trunk/gcc/testsuite/c-c++-common/Wshift-overflow-7.c
trunk/gcc/testsuite/g++.dg/cpp1y/left-shift-2.C
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/testsuite/ChangeLog