r255753 - in /trunk: gcc/testsuite/ChangeLog gc...

[msebor@gcc.gnu.org]

Author: msebor
Date: Sat Dec 16 22:37:22 2017
New Revision: 255753

URL: https://gcc.gnu.org/viewcvs?rev=255753&root=gcc&view=rev
Log:
PR tree-optimization/83239 - False positive from -Wstringop-overflow
on simple std::vector code

libstdc++/CHangeLog:
	* include/bits/vector.tcc (vector::_M_default_append): Assert
        invariant to generate better code.

gcc/testsuite/ChangeLog:
	* g++.dg/pr83239.C: New test case.

Added:
    trunk/gcc/testsuite/g++.dg/pr83239.C
Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/vector.tcc