[PATCH] taskdata: Add gettask_id_fromfnid helper function

[Richard Purdie <richard.purdie@linuxfoundation.org>]

This is like gettask_id but doesn't require translation of fnid -> fn
first which the function then translates back. This gives a sizeable
performance improvement since a significant number of lookups are avoided.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index 03766ad..e09e8c8 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -406,9 +406,8 @@ class RunQueueData:
                 depdata = taskData.build_targets[depid][0]
                 if depdata is None:
                     continue
-                dep = taskData.fn_index[depdata]
                 for taskname in tasknames:
-                    taskid = taskData.gettask_id(dep, taskname, False)
+                    taskid = taskData.gettask_id_fromfnid(depdata, taskname)
                     if taskid is not None:
                         depends.append(taskid)
 
@@ -419,9 +418,8 @@ class RunQueueData:
                 depdata = taskData.run_targets[depid][0]
                 if depdata is None:
                     continue
-                dep = taskData.fn_index[depdata]
                 for taskname in tasknames:
-                    taskid = taskData.gettask_id(dep, taskname, False)
+                    taskid = taskData.gettask_id_fromfnid(depdata, taskname)
                     if taskid is not None:
                         depends.append(taskid)
 
@@ -469,8 +467,7 @@ class RunQueueData:
                         # Won't be in build_targets if ASSUME_PROVIDED
                         depdata = taskData.build_targets[depid][0]
                         if depdata is not None:
-                            dep = taskData.fn_index[depdata]
-                            taskid = taskData.gettask_id(dep, idependtask, False)
+                            taskid = taskData.gettask_id_fromfnid(depdata, idependtask)
                             if taskid is None:
                                 bb.msg.fatal("RunQueue", "Task %s in %s depends upon non-existent task %s in %s" % (taskData.tasks_name[task], fn, idependtask, dep))
                             depends.append(taskid)
@@ -482,8 +479,7 @@ class RunQueueData:
                         # Won't be in run_targets if ASSUME_PROVIDED
                         depdata = taskData.run_targets[depid][0]
                         if depdata is not None:
-                            dep = taskData.fn_index[depdata]
-                            taskid = taskData.gettask_id(dep, idependtask, False)
+                            taskid = taskData.gettask_id_fromfnid(depdata, idependtask)
                             if taskid is None:
                                 bb.msg.fatal("RunQueue", "Task %s in %s rdepends upon non-existent task %s in %s" % (taskData.tasks_name[task], fn, idependtask, dep))
                             depends.append(taskid)
diff --git a/bitbake/lib/bb/taskdata.py b/bitbake/lib/bb/taskdata.py
index 8bc447c..55cdde5 100644
--- a/bitbake/lib/bb/taskdata.py
+++ b/bitbake/lib/bb/taskdata.py
@@ -116,6 +116,16 @@ class TaskData:
                 ids.append(self.tasks_lookup[fnid][task])
         return ids
 
+    def gettask_id_fromfnid(self, fnid, task):
+        """
+        Return an ID number for the task matching fnid and task.
+        """
+        if fnid in self.tasks_lookup:
+            if task in self.tasks_lookup[fnid]:
+                return self.tasks_lookup[fnid][task]
+
+        return None
+
     def gettask_id(self, fn, task, create = True):
         """
         Return an ID number for the task matching fn and task.