r226826 - in /trunk/gcc: c-family/ChangeLog c-f...

[mpolacek@gcc.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