decl.c (gnat_to_gnu_entity): Do not set "const" flag on "pure" Ada subprograms if...

decl.c (gnat_to_gnu_entity): Do not set "const" flag on "pure" Ada subprograms if SJLJ exceptions are used.

	* decl.c (gnat_to_gnu_entity) <E_Procedure>: Do not set "const" flag
	on "pure" Ada subprograms if SJLJ exceptions are used.
	* trans.c (Handled_Sequence_Of_Statements_to_gnu): Set TREE_NO_WARNING
	on the declaration node of JMPBUF_SAVE.
	* utils.c (init_gigi_decls): Set DECL_IS_PURE on the declaration nodes
	of Get_Jmpbuf_Address_Soft and Get_GNAT_Exception.
	* utils2.c (build_call_0_expr): Do not set TREE_SIDE_EFFECTS.

From-SVN: r117299