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Serialize routines with in() sets first, and in the right order.

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This commit is contained in:
Chris Pressey 2018-04-04 17:49:50 +01:00
parent cab84b8ebe
commit 9c68b6a7e0
2 changed files with 19 additions and 22 deletions
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19
src/sixtypical/fallthru.py
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@ -64,20 +64,16 @@ class FallthruAnalyzer(object):
self.fall_in_map = new_fall_in_map
def serialize(self):
self.fall_out_map = {}
for key, values in self.fall_in_map.iteritems():
for value in values:
assert value not in self.fall_out_map
self.fall_out_map[value] = key
for routine in self.program.routines:
if routine.name not in self.fall_out_map:
self.fall_out_map[routine.name] = None
pending_routines = sorted(self.fall_in_map.keys())
routine_names = sorted([routine.name for routine in self.program.routines])
for routine_name in routine_names:
if routine_name not in pending_routines:
pending_routines.append(routine_name)
roster = []
pending_routines = copy(self.fall_out_map)
while pending_routines:
# Pick a routine that is still pending to be serialized.
key = pending_routines.keys()[0]
key = pending_routines[0]
in_set = self.fall_in_map.get(key, [])
@ -86,12 +82,13 @@ class FallthruAnalyzer(object):
chains = find_chains(self.fall_in_map, key, lambda k: k in pending_routines)
chains.sort(key=len, reverse=True)
routines = chains[0]
routines.reverse()
# Append (r1,r2,...,rn) to the roster and remove r1,r2,...rn from R.
# A sublist like this appearing in the roster has meaning
# "optimize the final goto out of all but the last routine in the sublist".
for r in routines:
del pending_routines[r]
pending_routines.remove(r)
roster.append(routines)
return roster

22
tests/SixtyPical Fallthru.md
View File

@ -128,11 +128,11 @@ of them to fall through, when selecting the order of routines.
= *** serialization:
= [
= [
= "main",
= "bar",
= "foo"
= ],
= [
= "bar"
= "main"
= ]
= ]
@ -177,11 +177,11 @@ fall through to the other.
= *** serialization:
= [
= [
= "main"
= "foo",
= "bar"
= ],
= [
= "bar",
= "foo"
= "main"
= ]
= ]
@ -211,13 +211,13 @@ routine.
= *** serialization:
= [
= [
= "main"
= ],
= [
= "bar"
= ],
= [
= "foo"
= ],
= [
= "main"
= ]
= ]
@ -246,12 +246,12 @@ because we don't necessarily know what actual routine the vector contains.
= *** serialization:
= [
= [
= "main"
= ],
= [
= "bar"
= ],
= [
= "foo"
= ],
= [
= "main"
= ]
= ]