re PR tree-optimization/78938 (ICE in expand_vec_cond_expr, at optabs.c:5636 w/ -mavx512bw -ftree-loop-vectorize -O1)

	PR tree-optimization/78938
	* tree-vect-stmts.c (vectorizable_condition): For non-masked COND_EXPR
	where comp_vectype is VECTOR_BOOLEAN_TYPE_P, use
	BIT_{NOT,XOR,AND,IOR}_EXPR on the comparison operands instead of
	{EQ,NE,GE,GT,LE,LT}_EXPR directly inside of VEC_COND_EXPR.  Formatting
	fixes.

	* gcc.dg/vect/pr78938.c: New test.

From-SVN: r244223