Merge remote-tracking branch 'origin/master' into xaig_arrival

tests/simple/run-test.sh

@@ -12,7 +12,7 @@ done
 shift "$((OPTIND-1))"
 
 # check for Icarus Verilog
-if ! which iverilog > /dev/null ; then
+if ! command -v iverilog > /dev/null ; then
   echo "$0: Error: Icarus Verilog 'iverilog' not found."
   exit 1
 fi

tests/simple_abc9/run-test.sh

@@ -12,7 +12,7 @@ done
 shift "$((OPTIND-1))"
 
 # check for Icarus Verilog
-if ! which iverilog > /dev/null ; then
+if ! command -v iverilog > /dev/null ; then
   echo "$0: Error: Icarus Verilog 'iverilog' not found."
   exit 1
 fi

tests/various/hierarchy_defer.ys

@@ -0,0 +1,27 @@
+read -noverific
+read -vlog2k <<EOT
+module first;
+endmodule
+
+(* top *)
+module top(input i, output o);
+sub s0(i, o);
+endmodule
+
+(* constant_expression=1+1?2*2:3/3 *)
+module sub(input i, output o);
+assign o = ~i;
+endmodule
+EOT
+design -save read
+
+hierarchy -auto-top
+select -assert-any top
+select -assert-any sub
+select -assert-none foo
+
+design -load read
+hierarchy
+select -assert-any top
+select -assert-any sub
+select -assert-none foo