Make compiler pipeline a bit nicer to profile.

Cython/Compiler/Pipeline.py

@@ -323,8 +323,15 @@ def insert_into_pipeline(pipeline, transform, before=None, after=None):
 # Running a pipeline
 #
 
+_pipeline_entry_points = {}
+
+
 def run_pipeline(pipeline, source, printtree=True):
     from .Visitor import PrintTree
+    exec_ns = globals().copy() if DebugFlags.debug_verbose_pipeline else None
+
+    def run(phase, data):
+        return phase(data)
 
     error = None
     data = source
@@ -332,12 +339,19 @@ def run_pipeline(pipeline, source, printtree=True):
         try:
             for phase in pipeline:
                 if phase is not None:
+                    if not printtree and isinstance(phase, PrintTree):
+                        continue
                     if DebugFlags.debug_verbose_pipeline:
                         t = time()
                         print("Entering pipeline phase %r" % phase)
-                    if not printtree and isinstance(phase, PrintTree):
-                        continue
-                    data = phase(data)
+                        # create a new wrapper for each step to show the name in profiles
+                        phase_name = getattr(phase, '__name__', type(phase).__name__)
+                        try:
+                            run = _pipeline_entry_points[phase_name]
+                        except KeyError:
+                            exec("def %s(phase, data): return phase(data)" % phase_name, exec_ns)
+                            run = _pipeline_entry_points[phase_name] = exec_ns[phase_name]
+                    data = run(phase, data)
                     if DebugFlags.debug_verbose_pipeline:
                         print("    %.3f seconds" % (time() - t))
         except CompileError as err: