Add regression tests for declare before use.

ivtest/gold/decl_before_use1-iverilog-stderr.gold

@@ -0,0 +1,3 @@
+ivltests/decl_before_use1.v:4: error: Could not find variable ``v'' in ``test''
+ivltests/decl_before_use1.v:5: error: Unable to bind wire/reg/memory `v' in `test'
+2 error(s) during elaboration.

ivtest/gold/decl_before_use2-iverilog-stderr.gold

@@ -0,0 +1,3 @@
+ivltests/decl_before_use2.v:3: error: Net w is not defined in this context.
+ivltests/decl_before_use2.v:6: error: Unable to bind wire/reg/memory `w' in `test'
+2 error(s) during elaboration.

ivtest/gold/decl_before_use3-iverilog-stderr.gold

@@ -0,0 +1,2 @@
+ivltests/decl_before_use3.v:4: error: event <e> not found.
+1 error(s) during elaboration.

ivtest/gold/decl_before_use4-iverilog-stderr.gold

@@ -0,0 +1,3 @@
+ivltests/decl_before_use4.v:4: error: Unable to bind wire/reg/memory `e' in `test'
+ivltests/decl_before_use4.v:4: error: Failed to evaluate event expression 'e'.
+2 error(s) during elaboration.

ivtest/gold/decl_before_use5-iverilog-stderr.gold

@@ -0,0 +1,2 @@
+ivltests/decl_before_use5.v:4: error: Unable to bind wire/reg/memory `w' in `test'
+1 error(s) during elaboration.

ivtest/ivltests/decl_before_use1.v

@@ -0,0 +1,11 @@
+module test();
+
+initial begin
+  v = 1;
+  $display("%b", v);
+  $display("FAILED");
+end
+
+reg v;
+
+endmodule

ivtest/ivltests/decl_before_use2.v

@@ -0,0 +1,12 @@
+module test();
+
+assign w = 1;
+
+initial begin
+  $display("%b", w);
+  $display("FAILED");
+end
+
+wire [7:0] w;
+
+endmodule

ivtest/ivltests/decl_before_use3.v

@@ -0,0 +1,10 @@
+module test();
+
+initial begin
+  ->e;
+  $display("FAILED");
+end
+
+event e;
+
+endmodule

ivtest/ivltests/decl_before_use4.v

@@ -0,0 +1,12 @@
+module test();
+
+initial begin
+  @(e);
+  $display("FAILED");
+end
+
+event e;
+
+initial ->e;
+
+endmodule

ivtest/ivltests/decl_before_use5.v

@@ -0,0 +1,10 @@
+module test();
+
+initial begin
+  $display("%b", w);
+  $display("FAILED");
+end
+
+localparam w = 8'hAA;
+
+endmodule

ivtest/ivltests/decl_before_use6.v

@@ -0,0 +1,20 @@
+module test();
+
+localparam w = 8;
+
+task t;
+  reg [w:1] v;
+  localparam w = 2;
+  begin
+    v = 8'hAA;
+    $display("%b", v);
+    if (v === 8'hAA)
+      $display("PASSED");
+    else
+      $display("FAILED");
+  end
+endtask;
+
+initial t;
+
+endmodule

ivtest/regress-vvp.list

@@ -60,6 +60,12 @@ constfunc17			vvp_tests/constfunc17.json
 constfunc18			vvp_tests/constfunc18.json
 constfunc19			vvp_tests/constfunc19.json
 constfunc20			vvp_tests/constfunc20.json
+decl_before_use1		vvp_tests/decl_before_use1.json
+decl_before_use2		vvp_tests/decl_before_use2.json
+decl_before_use3		vvp_tests/decl_before_use3.json
+decl_before_use4		vvp_tests/decl_before_use4.json
+decl_before_use5		vvp_tests/decl_before_use5.json
+decl_before_use6		vvp_tests/decl_before_use6.json
 delayed_sfunc			vvp_tests/delayed_sfunc.json
 dffsynth			vvp_tests/dffsynth.json
 dffsynth-S			vvp_tests/dffsynth-S.json

ivtest/vvp_tests/decl_before_use1.json

@@ -0,0 +1,6 @@
+
+{
+    "type" : "CE",
+    "source" : "decl_before_use1.v",
+    "gold" : "decl_before_use1"
+}

ivtest/vvp_tests/decl_before_use2.json

@@ -0,0 +1,6 @@
+
+{
+    "type" : "CE",
+    "source" : "decl_before_use2.v",
+    "gold" : "decl_before_use2"
+}

ivtest/vvp_tests/decl_before_use3.json

@@ -0,0 +1,6 @@
+
+{
+    "type" : "CE",
+    "source" : "decl_before_use3.v",
+    "gold" : "decl_before_use3"
+}

ivtest/vvp_tests/decl_before_use4.json

@@ -0,0 +1,6 @@
+
+{
+    "type" : "CE",
+    "source" : "decl_before_use4.v",
+    "gold" : "decl_before_use4"
+}

ivtest/vvp_tests/decl_before_use5.json

@@ -0,0 +1,6 @@
+
+{
+    "type" : "CE",
+    "source" : "decl_before_use5.v",
+    "gold" : "decl_before_use5"
+}

ivtest/vvp_tests/decl_before_use6.json

@@ -0,0 +1,5 @@
+
+{
+    "type" : "normal",
+    "source" : "decl_before_use6.v"
+}