r217556 - in /trunk/gcc: ChangeLog fold-const.c...

Fri Nov 14 11:57:00 GMT 2014

Author: mpolacek
Date: Fri Nov 14 11:57:05 2014
New Revision: 217556

URL: https://gcc.gnu.org/viewcvs?rev=217556&root=gcc&view=rev
Log:
	* fold-const.c (fold_negate_expr): Don't fold INTEGER_CST if
	that overflows when SANITIZE_SI_OVERFLOW is on.  Guard -(-A)
	folding with TYPE_OVERFLOW_SANITIZED.

	* c-c++-common/ubsan/overflow-negate-3.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/ubsan/overflow-negate-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog