Merge d53295a3fb into 5ead758f28

src/V3LinkDot.cpp

@@ -3136,6 +3136,7 @@ class LinkDotResolveVisitor final : public VNVisitor {
     bool m_inPackedArray = false;  // Currently traversing a packed array tree
     bool m_replaceWithAlias
         = true;  // Replace VarScope with an alias. Used in the handling of AstAlias
+    bool m_isParam = false;  // Specifies whether currently visiting param variable
 
     struct DotStates final {
         DotPosition m_dotPos;  // Scope part of dotted resolution
@@ -5092,6 +5093,8 @@ class LinkDotResolveVisitor final : public VNVisitor {
     void visit(AstVar* nodep) override {
         LINKDOT_VISIT_START();
         checkNoDot(nodep);
+        VL_RESTORER(m_isParam);
+        m_isParam = nodep->varType().isParam();
         iterateChildren(nodep);
         if (m_statep->forPrimary() && nodep->isIO() && !m_ftaskp && !nodep->user4()) {
             nodep->v3error(
@@ -5273,27 +5276,32 @@ class LinkDotResolveVisitor final : public VNVisitor {
                 // which may find std::randomize and overwrite classOrPackagep
                 return;
             }
-            if (m_insideClassExtParam) {
+            VSymEnt* const foundp
-                // The reference may point to a method declared in a super class, which is proved
+                = m_statep->findSymPrefixed(dotSymp, nodep->name(), baddot, first);
-                // by a parameter. In such a case, it can't be linked at the first stage.
+            AstNodeFTask* const taskp = foundp ? VN_CAST(foundp->nodep(), NodeFTask) : nullptr;
-                // Must not do any linking, because e.g. might find an extends of an upper class
+            AstNodeModule* const taskModulep = foundp ? foundp->classOrPackagep() : nullptr;
-                // because the current class (under parent) isn't yet importing it's extended class
+            // Ignore deferring linking of functions inside params of classes extending
-                // symbols
+            // parametric classes if referenced function can be linked in the first pass.
-                return;
+            if (!m_isParam || !taskp
-            }
+                || (taskp->classMethod() && taskModulep && taskModulep->hasParameterList())) {
-            if (AstClass* const targetClassp = VN_CAST(dotSymp->nodep(), Class)) {
+                if (m_insideClassExtParam) {
-                if (m_extendsParam.count(targetClassp)) {
+                    // The reference may point to a method declared in a super class, which is
-                    // Target class has parameterized extends not yet resolved.
+                    // proved by a parameter. In such a case, it can't be linked at the first
-                    // Its inherited symbols (e.g. static functions from the base class)
+                    // stage. Must not do any linking, because e.g. might find an extends of an
-                    // aren't imported yet - defer to linkDotParamed.
+                    // upper class because the current class (under parent) isn't yet importing
+                    // it's extended class symbols.
                     return;
                 }
+                if (AstClass* const targetClassp = VN_CAST(dotSymp->nodep(), Class)) {
+                    if (m_extendsParam.count(targetClassp)) {
+                        // Target class has parameterized extends not yet resolved.
+                        // Its inherited symbols (e.g. static functions from the base class)
+                        // aren't imported yet - defer to linkDotParamed.
+                        return;
+                    }
+                }
             }
 
-            VSymEnt* const foundp
-                = m_statep->findSymPrefixed(dotSymp, nodep->name(), baddot, first);
-            AstNodeFTask* const taskp
-                = foundp ? VN_CAST(foundp->nodep(), NodeFTask) : nullptr;  // Maybe nullptr
             if (taskp) {
                 if (staticAccess && !taskp->isStatic()) {
                     // TODO bug4077

test_regress/t/t_ext_param_func.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of either the GNU Lesser General Public License Version 3
+# or the Perl Artistic License Version 2.0.
+# SPDX-FileCopyrightText: 2026 Wilson Snyder
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+import vltest_bootstrap
+
+test.scenarios('vlt')
+
+test.compile()
+
+test.execute()
+
+test.passes()

test_regress/t/t_ext_param_func.v

@@ -0,0 +1,86 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain
+// SPDX-FileCopyrightText: 2026 Antmicro
+// SPDX-License-Identifier: CC0-1.0
+
+`define stop $stop
+`define checkh(gotv, expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d:  got=%0x exp=%0x (%s !== %s)\n", `__FILE__,`__LINE__, (gotv), (expv), `"gotv`", `"expv`"); `stop; end while(0);
+
+function automatic int align(input int a, input int b);
+  return a - (a % b);
+endfunction
+
+class Foo;
+
+  static function int mul(input int a, input int b);
+    return a * b;
+  endfunction
+
+endclass : Foo
+
+class FooParam #(parameter int param = 5);
+
+  static function int mul(input int a);
+    return a * param;
+  endfunction
+
+endclass : FooParam
+
+class Base #(parameter int param = 5);
+
+  function int get_base_param();
+    return param;
+  endfunction
+
+  static function int alignUp(input int a);
+    return ((a + param - 1) / param) * param;
+  endfunction
+
+endclass : Base
+
+class Derived #(
+  parameter int a = 17,
+  parameter int b = 8,
+  parameter int c = align(a, b),
+  parameter int d = Base#(b)::alignUp(a),
+  parameter int e = Foo::mul(a, b),
+  parameter int f = FooParam#()::mul(a)
+) extends Base #(
+  .param (a)
+);
+
+  function int get_third_param();
+    return c;
+  endfunction
+
+  function int get_fourth_param();
+    return d;
+  endfunction
+
+  function int get_fifth_param();
+    return e;
+  endfunction
+
+  function int get_sixth_param();
+    return f;
+  endfunction
+
+endclass : Derived
+
+module t (clk);
+  input clk;
+
+  Derived inst = new;
+
+  always @(posedge clk) begin
+    `checkh(inst.get_base_param(), 17)
+    `checkh(inst.get_third_param(), 16)
+    `checkh(inst.get_fourth_param(), 24)
+    `checkh(inst.get_fifth_param(), 136)
+    `checkh(inst.get_sixth_param(), 85)
+    $write("*-* All Finished *-*\n");
+    $finish;
+  end
+
+endmodule