* c-typeck.c (check_modify_expr): New function.

	* c-typeck.c (check_modify_expr): New function.
	(build_modify_expr): Call it if warn_sequence_point.
	* c-decl.c (warn_sequence_point): New variable.
	(c_decode_option): Handle -Wsequence-point and
	-Wno-sequence-point.  Enable -Wsequence-point as part of -Wall.
	* c-tree.h (warn_sequence_point): Declare.
	* invoke.texi (-Wsequence-point): Document.
	* toplev.c (documented_lang_options): Add -Wsequence-point and
	-Wno-sequence-point.
	Original work by Michael Meeks, 16 Jun 1998.

testsuite:
	* gcc.dg/sequence-pt-1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36840 138bc75d-0d04-0410-961f-82ee72b054a4