Hello,

this patch adds mixed scalar-vector operations to the C++ front-end. It 
also adds a few operators to the C front-end (comparisons in particular). 
This patch is mostly an import from the C front-end (with the maybe_const 
stuff removed).

2012-09-22  Marc Glisse  <marc.glisse@inria.fr>

 	PR c++/54427

c/
 	* c-typeck.c: Include c-common.h.
 	(enum stv_conv): Moved to c-common.h.
 	(scalar_to_vector): Moved to c-common.c.
 	* Make-lang.in: c-typeck.c depends on c-common.h.

c-family/
 	* c-common.c (scalar_to_vector): Moved from c-typeck.c. Support
 	more operations.
 	* c-common.h (enum stv_conv): Moved from c-typeck.c.
 	(scalar_to_vector): Declare.

cp/
 	* typeck.c (cp_build_binary_op): Handle mixed scalar-vector
 	operations.
 	[LSHIFT_EXPR, RSHIFT_EXPR]: Likewise.

gcc/
 	* fold-const.c (fold_binary_loc): Use build_zero_cst instead of
 	build_int_cst for a potential vector.

testsuite/
 	* c-c++-common/vector-scalar.c: New testcase.
 	* g++.dg/ext/vector5.C: This is not an error anymore.
 	* gcc.dg/init-vec-1.c: Move ...
 	* c-c++-common/init-vec-1.c: ... here. Adapt error message.
 	* gcc.c-torture/execute/vector-shift1.c: Move ...
 	* c-c++-common/torture/vector-shift1.c: ... here.
 	* gcc.dg/scal-to-vec1.c: Move ...
 	* c-c++-common/scal-to-vec1.c: ... here. Avoid narrowing for
 	C++11. Adapt error message.
 	* gcc.dg/convert-vec-1.c: Move ...
 	* c-c++-common/convert-vec-1.c: ... here.
 	* gcc.dg/scal-to-vec2.c: Move ...
 	* c-c++-common/scal-to-vec2.c: ... here.

-- 
Marc Glisse