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fhdl.ir: add tests for port propagation.

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This commit is contained in:
whitequark 2018-12-13 08:09:39 +00:00
parent c60392595b
commit b1a89ef5fd
3 changed files with 78 additions and 2 deletions
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2
nmigen/fhdl/ir.py
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@ -50,7 +50,7 @@ class Fragment:
assert isinstance(subfragment, Fragment)
self.subfragments.append((subfragment, name))
def _propagate_ports(self, ports, clock_domains):
def _propagate_ports(self, ports, clock_domains={}):
# Collect all signals we're driving (on LHS of statements), and signals we're using
# (on RHS of statements, or in clock domains).
self_driven = union(s._lhs_signals() for s in self.statements)