2013-05-10  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* stor-layout.c (element_precision): New function.
	* machmode.h (element_precision): Declare it.
	* tree.c (build_minus_one_cst): New function.
	(element_precision): Likewise.
	* tree.h (build_minus_one_cst): Declare new function.
	(element_precision): Likewise.
	* fold-const.c (operand_equal_p): Use element_precision.
	(fold_binary_loc): Handle vector types.
	* convert.c (convert_to_integer): Use element_precision.
	* gimple.c (iterative_hash_canonical_type): Handle complex and vectors
	separately.

gcc/c-family/
	* c-common.c (vector_types_convertible_p): No TYPE_PRECISION for
	vectors.

gcc/testsuite/
	* gcc.dg/vector-shift.c: New testcase.

From-SVN: r198772