2011-08-10 Artjoms Sinkarovs <artyom.shinakroff@gmail.com>

2011-08-10  Artjoms Sinkarovs <artyom.shinakroff@gmail.com>

	* c-typeck.c (scalar_to_vector): New function. Try scalar to
	vector conversion.
	(stv_conv): New enum for scalar_to_vector return type.
	(build_binary_op): Adjust.
	* doc/extend.texi: Description of scalar to vector expansion.

	c-family/
	* c-common.c (unsafe_conversion_p): New function. Check if it is
	unsafe to convert an expression to the type.
	(conversion_warning): Adjust, use unsafe_conversion_p.
	* c-common.h (unsafe_conversion_p): New function declaration.

	testsuite/
	* gcc.c-torture/execute/scal-to-vec1.c: New test.
	* gcc.c-torture/execute/scal-to-vec2.c: New test.
	* gcc.c-torture/execute/scal-to-vec3.c: New test.
	* gcc.dg/scal-to-vec1.c: New test.
	* gcc.dg/scal-to-vec2.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177622 138bc75d-0d04-0410-961f-82ee72b054a4