exp_attr.adb (N_Pragma): Chars field removed.

2008-03-26  Javier Miranda  <miranda@adacore.com>
	    Robert Dewar  <dewar@adacore.com>

	* exp_attr.adb (N_Pragma): Chars field removed.
	(Expand_N_Attribute_Reference): If the designated type associated with
	attribute 'Unrestricted_Access is a subprogram entity then replace it
	by an E_Subprogram_Type itype.
	Implement attribute Old

	* sem_attr.ads (Attribute_Class_Array): Move to snames.ads

	* sem_attr.adb (Build_Access_Subprogram_Itype): Add documentation.
	Replace call to
	New_Internal_Entity by call to Create_Itype to centralize calls
	building itypes, ad propagate the convention of the designated
	subprogram. In addition, disable the machinery cleaning constant
	indications from all entities in current scope when 'Unrestricted_Access
	corresponds with a node initializing a dispatch table slot.
	(Analyze_Attribute): Parameterless attributes returning a string or a
	type will not be called with improper arguments, so we can remove junk
	code that was dealing with this case.
	Implement attribute Old

	* snames.ads, snames.h, snames.adb: Add entries for attribute Old
	Add entry for pragma Optimize_Alignment
	New standard names Sync and Synchronize

From-SVN: r133559

gcc/ada/snames.adb

@@ -206,6 +206,7 @@ package body Snames is
      "no_run_time#" &
      "no_strict_aliasing#" &
      "normalize_scalars#" &
+     "optimize_alignment#" &
      "polling#" &
      "persistent_bss#" &
      "priority_specific_dispatching#" &
@@ -495,6 +496,7 @@ package body Snames is
      "modulus#" &
      "null_parameter#" &
      "object_size#" &
+     "old#" &
      "partition_id#" &
      "passed_by_reference#" &
      "pool_address#" &
@@ -778,6 +780,8 @@ package body Snames is
      "stack#" &
      "switches#" &
      "symbolic_link_supported#" &
+     "sync#" &
+     "synchronize#" &
      "toolchain_description#" &
      "toolchain_version#" &
      "runtime_library_dir#" &