Merge pull request #4605 from povik/liberty-unit-delay

read_liberty: Optionally import unit delay arcs

tests/liberty/.gitignore

@@ -1,4 +1,3 @@
 *.log
-test.ys
 *.filtered
 *.verilogsim

tests/liberty/run-test.sh

@@ -3,11 +3,13 @@ set -e
 
 for x in *.lib; do
 	echo "Testing on $x.."
-	echo "read_verilog small.v" > test.ys
-	echo "synth -top small" >> test.ys
-	echo "dfflibmap -info -liberty ${x}" >> test.ys
-	../../yosys -ql ${x%.lib}.log -s test.ys
+	../../yosys -p "read_verilog small.v; synth -top small; dfflibmap -info -liberty ${x}" -ql ${x%.lib}.log
 	../../yosys-filterlib - $x 2>/dev/null > $x.filtered
 	../../yosys-filterlib -verilogsim $x > $x.verilogsim
 	diff $x.filtered $x.filtered.ok && diff $x.verilogsim $x.verilogsim.ok
 done
+
+for x in *.ys; do
+  echo "Running $x.."
+  ../../yosys -q -s $x -l ${x%.ys}.log
+done

tests/liberty/unit_delay.ys

@@ -0,0 +1,3 @@
+# Nothing gets imported: the file lacks timing data
+read_liberty -wb -unit_delay normal.lib
+select -assert-none =*/t:$specify*