Fix tests that used variables/nets before declaring them.

The sdf_interconnect tests just need the code reordering. The
pr1909940 tests were written to test use before declaration, so
now need to be CE tests.

ivtest/ivltests/sdf_interconnect1.v

@@ -42,14 +42,14 @@ endmodule
 
 module top;
 
+    reg a;
+    wire b;
+
     initial begin
         $sdf_annotate("ivltests/sdf_interconnect1.sdf", my_design_inst);
         $monitor("time=%0t a=%h b=%h", $realtime, a, b);
     end
 
-    reg a;
-    wire b;
-
     initial begin
         #5;
         a <= 1'b0;
@@ -65,4 +65,3 @@ module top;
     );
 
 endmodule
-

ivtest/ivltests/sdf_interconnect2.v

@@ -44,14 +44,14 @@ endmodule
 
 module top;
 
+    reg a;
+    wire b;
+
     initial begin
         $sdf_annotate("ivltests/sdf_interconnect2.sdf", my_design_inst);
         $monitor("time=%0t a=%h b=%h", $realtime, a, b);
     end
 
-    reg a;
-    wire b;
-
     initial begin
         #5;
         a <= 1'b0;
@@ -67,4 +67,3 @@ module top;
     );
 
 endmodule
-

ivtest/ivltests/sdf_interconnect3.v

@@ -87,14 +87,14 @@ endmodule
 
 module top;
 
+    reg a, b, c;
+    wire d;
+
     initial begin
         $sdf_annotate("ivltests/sdf_interconnect3.sdf", my_design_inst);
         $monitor("time=%0t a=%h b=%h c=%h d=%h", $realtime, a, b, c, d);
     end
 
-    reg a, b, c;
-    wire d;
-
     initial begin
         #10;
         a <= 1'b0;
@@ -140,4 +140,3 @@ module top;
     );
 
 endmodule
-

ivtest/ivltests/sdf_interconnect4.v

@@ -41,14 +41,14 @@ endmodule
 
 module top;
 
+    reg [2:0] a;
+    wire [2:0] b;
+
     initial begin
         $sdf_annotate("ivltests/sdf_interconnect4.sdf", my_design_inst);
         $monitor("time=%0t a=%b b=%b", $realtime, a, b);
     end
 
-    reg [2:0] a;
-    wire [2:0] b;
-
     initial begin
         #5;
         a <= 3'b000;
@@ -64,4 +64,3 @@ module top;
     );
 
 endmodule
-

ivtest/regress-ivl1.list

@@ -286,10 +286,6 @@ sv_deferred_assume2	CE,-g2009		ivltests gold=sv_deferred_assume2.gold
 # Icarus deviations
 #------------------------------------------------------------------------------
 
-# Icarus still allows (implicit) declaration after use in some circumstances.
-pr1909940		normal			ivltests
-pr1909940b		normal			ivltests
-
 # Icarus allows hierarchical references to unnamed generate blocks.
 # We should add a warning about this, as it's not strictly allowed.
 unnamed_generate_block	normal			ivltests gold=unnamed_generate_block.gold

ivtest/regress-vlg.list

@@ -1106,6 +1106,8 @@ pr1903324		normal			ivltests
 pr1903343		normal			ivltests gold=pr1903343.gold
 pr1903520		normal			ivltests
 pr1907192		normal			ivltests
+pr1909940		CE			ivltests
+pr1909940b		CE			ivltests
 pr1912843		normal			ivltests
 pr1913918a		normal			ivltests
 pr1913918b		normal			ivltests