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-rw-r--r--passes/pmgen/xilinx_srl.pmg8
1 files changed, 4 insertions, 4 deletions
diff --git a/passes/pmgen/xilinx_srl.pmg b/passes/pmgen/xilinx_srl.pmg
index 45d44247a..b18119b87 100644
--- a/passes/pmgen/xilinx_srl.pmg
+++ b/passes/pmgen/xilinx_srl.pmg
@@ -105,7 +105,7 @@ endcode
match next
select next->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, \FDRE, \FDRE_1)
select !next->has_keep_attr()
- select !port(next, \D)[0].wire->get_bool_attribute(\keep)
+ select port(next, \D)[0].wire && !port(next, \D)[0].wire->get_bool_attribute(\keep)
select nusers(port(next, \Q)) == 2
index <IdString> next->type === first->type
index <SigBit> port(next, \Q) === port(first, \D)
@@ -132,7 +132,7 @@ match next
semioptional
select next->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, \FDRE, \FDRE_1)
select !next->has_keep_attr()
- select !port(next, \D)[0].wire->get_bool_attribute(\keep)
+ select port(next, \D)[0].wire && !port(next, \D)[0].wire->get_bool_attribute(\keep)
select nusers(port(next, \Q)) == 2
index <IdString> next->type === chain.back()->type
index <SigBit> port(next, \Q) === port(chain.back(), \D)
@@ -201,7 +201,7 @@ endcode
match first
select first->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, $dff, $dffe)
select !first->has_keep_attr()
- select !port(first, \Q)[0].wire->get_bool_attribute(\keep)
+ select port(first, \Q)[0].wire && !port(first, \Q)[0].wire->get_bool_attribute(\keep)
slice idx GetSize(port(first, \Q))
select nusers(port(first, \Q)[idx]) <= 2
index <SigBit> port(first, \Q)[idx] === port(shiftx, \A)[shiftx_width-1]
@@ -272,7 +272,7 @@ match next
semioptional
select next->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, $dff, $dffe)
select !next->has_keep_attr()
- select !port(next, \D)[0].wire->get_bool_attribute(\keep)
+ select port(next, \D)[0].wire && !port(next, \D)[0].wire->get_bool_attribute(\keep)
slice idx GetSize(port(next, \Q))
select nusers(port(next, \Q)[idx]) <= 3
index <IdString> next->type === chain.back().first->type