re PR c/65345 (ICE with _Generic selection on _Atomic int)

re PR c/65345 (ICE with _Generic selection on _Atomic int)

	PR c/65345
	* c-decl.c (set_labels_context_r): New function.
	(store_parm_decls): Call it via walk_tree_without_duplicates.
	* c-typeck.c (convert_lvalue_to_rvalue): Use create_tmp_var_raw
	instead of create_tmp_var.  Build TARGET_EXPR instead of
	COMPOUND_EXPR.
	(build_atomic_assign): Use create_tmp_var_raw instead of
	create_tmp_var.  Build TARGET_EXPRs instead of MODIFY_EXPR.

	* gcc.dg/pr65345-1.c: New test.
	* gcc.dg/pr65345-2.c: New test.

From-SVN: r222370