Add field names for the proc_layout_info type.

Estimated hours taken: 1

compiler/continuation_info.m:
	Add field names for the proc_layout_info type.

compiler/optimize.m:
	Use the new field names.

compiler/continuation_info.m

@@ -61,28 +61,37 @@
 	%
 :- type proc_layout_info
 	--->	proc_layout_info(
-			label,		% The entry label.
-			determinism,	% Determines which stack is used.
-			int,		% Number of stack slots.
-			maybe(int),	% Location of succip on stack.
-			maybe(label),	% If the trace level is not none,
-					% this contains the label associated
-					% with the call event, whose stack
-					% layout says which variables were
-					% live and where on entry.
-			int,		% The number of the highest numbered
+			entry_label	:: label,
+					% Determines which stack is used.
+			detism		:: determinism,
+					% Number of stack slots.
+			stack_slot_count :: int,
+					% Location of succip on stack.
+			succip_slot	:: maybe(int),
+					% If the trace level is not none, this
+					% contains the label associated with
+					% the call event, whose stack layout
+					% gives the locations of the input
+					% arguments on procedure entry, for
+					% use in implementing retry in the
+					% debugger.
+			call_label	:: maybe(label),
+					% The number of the highest numbered
 					% rN register that can contain useful
 					% information during a call to MR_trace
 					% from within this procedure.
-			trace_slot_info,% Info about the stack slots used
+			max_trace_reg	:: int,
+					% Info about the stack slots used
 					% for tracing.
-			bool,		% Do we require the procedure id
+			trace_slot_info	:: trace_slot_info,
+					% Do we require the procedure id
 					% section of the procedure layout
 					% to be present, even if the option
 					% procid_stack_layout is not set?
-			proc_label_layout_info
+			need_proc_id	:: bool,
 					% Info for each internal label,
 					% needed for basic_stack_layouts.
+			internal_map	:: proc_label_layout_info
 		).
 
 	%
@@ -338,7 +347,7 @@ continuation_info__process_proc_llds(PredProcId, Instructions,
 
 		% Get all the continuation info from the call instructions.
 	global_data_get_proc_layout(GlobalData0, PredProcId, ProcLayoutInfo0),
-	ProcLayoutInfo0 = proc_layout_info(A, B, C, D, E, F, G, H, Internals0),
+	Internals0 = ProcLayoutInfo0^internal_map,
 	GetCallInfo = lambda([Instr::in, Call::out] is semidet, (
 		Instr = call(Target, label(ReturnLabel), LiveInfo, Context, _)
 			- _Comment,
@@ -350,7 +359,7 @@ continuation_info__process_proc_llds(PredProcId, Instructions,
 	list__foldl(continuation_info__process_continuation(WantReturnInfo),
 		Calls, Internals0, Internals),
 
-	ProcLayoutInfo = proc_layout_info(A, B, C, D, E, F, G, H, Internals),
+	ProcLayoutInfo = ProcLayoutInfo0^internal_map := Internals,
 	global_data_update_proc_layout(GlobalData0, PredProcId, ProcLayoutInfo,
 		GlobalData).
 

compiler/optimize.m

@@ -53,8 +53,7 @@ optimize__proc(CProc0, GlobalData, CProc) -->
 		global_data_maybe_get_proc_layout(GlobalData, PredProcId,
 			ProcLayout)
 	->
-		ProcLayout = proc_layout_info(_, _, _, _, _, _, _, _,
-			LabelMap),
+		LabelMap = ProcLayout^internal_map,
 		map__sorted_keys(LabelMap, LayoutLabels),
 		set__sorted_list_to_set(LayoutLabels, LayoutLabelSet)
 	;