invoke.texi (Warning Options): Add -Wconversion-sign.

2007-05-19  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* doc/invoke.texi (Warning Options): Add -Wconversion-sign.
	(Wconversion): Update description.
	(Wconversion-sign): New.
	* c.opt (Wconversion-sign): New.
	* c-opts.c (c_common_post_options): Uninitialized Wconversion-sign
	means disabled for C++. Otherwise, take the status of Wconversion.
	* c-common.c (conversion_warning): Warn with either Wconversion or
	Wconversion-sign.
	(warnings_for_convert_and_check): Conditions are already checked by
	conversion_warning.
	(convert_and_check): Don't check warnings if the conversion failed.

cp/
	* cvt.c (cp_convert_and_check): Don't check warnings if the
	conversion failed.

testsuite/
	* gcc.dg/Wconversion-integer.c: Group testcases and add more.
	* gcc.dg/Wconversion-sign.c: New.
	* gcc.dg/Wconversion-integer-no-sign.c: New.
	* g++.dg/warn/Wconversion-integer.C: Move some warnings to
	Wconversion-sign.C
	* g++.dg/warn/Wconversion-sign.C: New.
	* g++.old-deja/g++.other/warn4.C: Update.
	* g++.dg/warn/Wconversion1.C: Likewise.

From-SVN: r124856

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/c.opt b/gcc/c.opt
index 0635fdc..0ef7693 100644
--- a/gcc/c.opt
+++ b/gcc/c.opt
@@ -164,6 +164,10 @@ Wconversion
 C ObjC C++ ObjC++ Var(warn_conversion) Warning
 Warn for implicit type conversions that may change a value
 
+Wsign-conversion
+C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
+Warn for implicit type conversions between signed and unsigned integers
+
 Wctor-dtor-privacy
 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
 Warn when all constructors and destructors are private