re PR c/63862 (C frontend converts shift-count to int while standard wants integer...

re PR c/63862 (C frontend converts shift-count to int while standard wants integer promotions)

	PR c/63862
c-family/
	* c-ubsan.c (ubsan_instrument_shift): Change the type of a MINUS_EXPR
	to op1_utype.
	* c-gimplify.c (c_gimplify_expr): Convert right operand of a shift
	expression to unsigned_type_node.
c/
	* c-typeck.c (build_binary_op) <RSHIFT_EXPR, LSHIFT_EXPR>: Don't
	convert the right operand to integer type.
cp/
	* typeck.c (cp_build_binary_op) <RSHIFT_EXPR, LSHIFT_EXPR>: Don't
	convert the right operand to integer type.
testsuite/
	* gcc.c-torture/execute/shiftopt-1.c: Don't XFAIL anymore.
	* c-c++-common/ubsan/shift-7.c: New test.

From-SVN: r218142