2010-07-03  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* c-family/c-common.c (IN_GCC_FRONTEND): Do not undef.
	Do not include expr.h
	(vector_mode_valid_p): Move here.
	* expr.c (vector_mode_valid_p): Move to c-common.c.
	* expr.h (vector_mode_valid_p): Do not declare here.
	* system.h: Poison GCC_EXPR_H in front-ends.
	* Makefile.in: Update dependencies.

From-SVN: r161785