proc_prune: fix handling of exactly identical assigns #1267
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Before this commit, in a process like:
process $proc$bug.v:8$3
assign $foo \bar
switch \sel
case 1'1
assign $foo 1'1
assign $foo 1'1
case
assign $foo 1'0
end
end
both of the "assign $foo 1'1" would incorrectly be removed.
Fixes YosysHQ#1243.
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Before this commit, in a process like:
both of the
assign $foo 1'1would incorrectly be removed.Fixes #1243.