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hdl.ast: hash-cons ValueKey.

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This speeds up elaboration by ~10%.
This commit is contained in:
whitequark 2019-08-08 10:56:23 +00:00
parent 4ee82c9584
commit 9d2cbbabb8
1 changed files with 15 additions and 14 deletions
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29
nmigen/hdl/ast.py
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@ -1256,32 +1256,33 @@ class _MappedKeySet(MutableSet, _MappedKeyCollection):
class ValueKey:
def __init__(self, value):
self.value = Value.wrap(value)
def __hash__(self):
if isinstance(self.value, Const):
return hash(self.value.value)
self._hash = hash(self.value.value)
elif isinstance(self.value, (Signal, AnyValue)):
return hash(self.value.duid)
self._hash = hash(self.value.duid)
elif isinstance(self.value, (ClockSignal, ResetSignal)):
return hash(self.value.domain)
self._hash = hash(self.value.domain)
elif isinstance(self.value, Operator):
return hash((self.value.op, tuple(ValueKey(o) for o in self.value.operands)))
self._hash = hash((self.value.op, tuple(ValueKey(o) for o in self.value.operands)))
elif isinstance(self.value, Slice):
return hash((ValueKey(self.value.value), self.value.start, self.value.end))
self._hash = hash((ValueKey(self.value.value), self.value.start, self.value.end))
elif isinstance(self.value, Part):
return hash((ValueKey(self.value.value), ValueKey(self.value.offset),
self.value.width, self.value.stride))
self._hash = hash((ValueKey(self.value.value), ValueKey(self.value.offset),
self.value.width, self.value.stride))
elif isinstance(self.value, Cat):
return hash(tuple(ValueKey(o) for o in self.value.parts))
self._hash = hash(tuple(ValueKey(o) for o in self.value.parts))
elif isinstance(self.value, ArrayProxy):
return hash((ValueKey(self.value.index),
tuple(ValueKey(e) for e in self.value._iter_as_values())))
self._hash = hash((ValueKey(self.value.index),
tuple(ValueKey(e) for e in self.value._iter_as_values())))
elif isinstance(self.value, Sample):
return hash((ValueKey(self.value.value), self.value.clocks, self.value.domain))
self._hash = hash((ValueKey(self.value.value), self.value.clocks, self.value.domain))
else: # :nocov:
raise TypeError("Object '{!r}' cannot be used as a key in value collections"
.format(self.value))
def __hash__(self):
return self._hash
def __eq__(self, other):
if type(other) is not ValueKey:
return False
@ -1358,6 +1359,7 @@ class ValueSet(_MappedKeySet):
class SignalKey:
def __init__(self, signal):
self.signal = signal
if type(signal) is Signal:
self._intern = (0, signal.duid)
elif type(signal) is ClockSignal:
@ -1366,7 +1368,6 @@ class SignalKey:
self._intern = (2, signal.domain)
else:
raise TypeError("Object '{!r}' is not an nMigen signal".format(signal))
self.signal = signal
def __hash__(self):
return hash(self._intern)