re PR c/2707 (gcc does not warn on truncate)

re PR c/2707 (gcc does not warn on truncate)

2006-11-24  Manuel Lopez-Ibanez <manu@gcc.gnu.org>

	PR c/2707
	PR c++/26167
	* c-common.c (conversion_warning): New.
	(convert_and_check): Call conversion_warning unless there is an
	overflow warning.
	* doc/invoke.texi (-Wconversion): Update description.

testsuite/

	* gcc.dg/Wconversion-integer.c: New. Supersedes
	Wconversion-negative-constants.c
	* gcc.dg/Wconversion-real.c: New.
	* gcc.dg/Wconversion-real-integer.c: New.
	* gcc.dg/Wconversion-negative-constants.c: Deleted.
	* g++.dg/warn/Wconversion1.C: Modified.

From-SVN: r119143