Add lint warning on always_comb multidriven (#3888) (#3939)

docs/CONTRIBUTORS

@@ -3,6 +3,7 @@ under the Developer Certificate of Origin (https://developercertificate.org/).
 
 Please see the Verilator manual for 200+ additional contributors. Thanks to all.
 
+Adam Bagley
 Adrien Le Masle
 Ahmed El-Mahmoudy
 Aleksander Kiryk

src/V3Undriven.cpp

@@ -46,8 +46,15 @@ class UndrivenVarEntry final {
     AstVar* const m_varp;  // Variable this tracks
     std::vector<bool> m_wholeFlags;  // Used/Driven on whole vector
     std::vector<bool> m_bitFlags;  // Used/Driven on each subbit
+    const AstAlways* m_alwCombp
+        = nullptr;  // always_comb of var if driven within always_comb, else nullptr
+    const FileLine* m_alwCombFileLinep = nullptr;  // File line of always_comb of var if driven
+                                                   // within always_comb, else nullptr
+    const AstNodeVarRef* m_nodep = nullptr;  // varref if driven, else nullptr
+    const FileLine* m_nodeFileLinep = nullptr;  // File line of varref if driven, else nullptr
+    bool m_underGen = false;  // Under a generate
 
-    enum : uint8_t { FLAG_USED = 0, FLAG_DRIVEN = 1, FLAGS_PER_BIT = 2 };
+    enum : uint8_t { FLAG_USED = 0, FLAG_DRIVEN = 1, FLAG_DRIVEN_ALWCOMB = 2, FLAGS_PER_BIT = 3 };
 
 public:
     // CONSTRUCTORS
@@ -117,6 +124,24 @@ public:
         UINFO(9, "set d[*] " << m_varp->name() << endl);
         m_wholeFlags[FLAG_DRIVEN] = true;
     }
+    void drivenWhole(const AstNodeVarRef* nodep, const FileLine* fileLinep) {
+        drivenWhole();
+        m_nodep = nodep;
+        m_nodeFileLinep = fileLinep;
+    }
+    void drivenAlwaysCombWhole(const AstAlways* alwCombp, const FileLine* fileLinep) {
+        m_wholeFlags[FLAG_DRIVEN_ALWCOMB] = true;
+        m_alwCombp = alwCombp;
+        m_alwCombFileLinep = fileLinep;
+    }
+    void underGenerate() { m_underGen = true; }
+    bool isUnderGen() const { return m_underGen; }
+    bool isDrivenWhole() const { return m_wholeFlags[FLAG_DRIVEN]; }
+    bool isDrivenAlwaysCombWhole() const { return m_wholeFlags[FLAG_DRIVEN_ALWCOMB]; }
+    const AstNodeVarRef* getNodep() const { return m_nodep; }
+    const FileLine* getNodeFileLinep() const { return m_nodeFileLinep; }
+    const AstAlways* getAlwCombp() const { return m_alwCombp; }
+    const FileLine* getAlwCombFileLinep() const { return m_alwCombFileLinep; }
     void usedBit(int bit, int width) {
         UINFO(9, "set u[" << (bit + width - 1) << ":" << bit << "] " << m_varp->name() << endl);
         for (int i = 0; i < width; i++) {
@@ -304,7 +329,7 @@ private:
         for (int usr = 1; usr < (m_alwaysCombp ? 3 : 2); ++usr) {
             // For assigns and non-combo always, do just usr==1, to look
             // for module-wide undriven etc.
-            // For non-combo always, run both usr==1 for above, and also
+            // For combo always, run both usr==1 for above, and also
             // usr==2 for always-only checks.
             UndrivenVarEntry* const entryp = getEntryp(nodep, usr);
             if (nodep->isNonOutput() || nodep->isSigPublic() || nodep->isSigUserRWPublic()
@@ -381,7 +406,43 @@ private:
                     UINFO(9, " Full bus.  Entryp=" << cvtToHex(entryp) << endl);
                     warnAlwCombOrder(nodep);
                 }
-                entryp->drivenWhole();
+                if (entryp->isDrivenWhole() && !m_inBBox && !VN_IS(nodep, VarXRef)
+                    && !VN_IS(nodep->dtypep()->skipRefp(), UnpackArrayDType)
+                    && nodep->fileline() != entryp->getNodeFileLinep() && !entryp->isUnderGen()) {
+                    if (m_alwaysCombp
+                        && (!entryp->isDrivenAlwaysCombWhole()
+                            || (entryp->isDrivenAlwaysCombWhole()
+                                && m_alwaysCombp != entryp->getAlwCombp()
+                                && m_alwaysCombp->fileline() != entryp->getAlwCombFileLinep()))) {
+                        nodep->v3warn(
+                            MULTIDRIVEN,
+                            "Variable written to in always_comb also written by other process"
+                                << " (IEEE 1800-2017 9.2.2.2): " << nodep->prettyNameQ() << '\n'
+                                << nodep->warnOther() << '\n'
+                                << nodep->warnContextPrimary() << '\n'
+                                << entryp->getNodep()->warnOther()
+                                << "... Location of other write\n"
+                                << entryp->getNodep()->warnContextSecondary());
+                    }
+                    if (!m_alwaysCombp && entryp->isDrivenAlwaysCombWhole()) {
+                        nodep->v3warn(MULTIDRIVEN,
+                                      "Variable also written to in always_comb"
+                                          << " (IEEE 1800-2017 9.2.2.2): " << nodep->prettyNameQ()
+                                          << '\n'
+                                          << nodep->warnOther() << '\n'
+                                          << nodep->warnContextPrimary() << '\n'
+                                          << entryp->getNodep()->warnOther()
+                                          << "... Location of always_comb write\n"
+                                          << entryp->getNodep()->warnContextSecondary());
+                    }
+                }
+                entryp->drivenWhole(nodep, nodep->fileline());
+                if (m_alwaysCombp && entryp->isDrivenAlwaysCombWhole()
+                    && m_alwaysCombp != entryp->getAlwCombp()
+                    && m_alwaysCombp->fileline() == entryp->getAlwCombFileLinep())
+                    entryp->underGenerate();
+                if (m_alwaysCombp)
+                    entryp->drivenAlwaysCombWhole(m_alwaysCombp, m_alwaysCombp->fileline());
             }
             if (m_inBBox || nodep->access().isReadOrRW()
                 || fdrv

test_regress/t/t_lint_always_comb_multidriven.out

@@ -0,0 +1,87 @@
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:26:16: Variable written to in always_comb also written by other process (IEEE 1800-2017 9.2.2.2): 'out1'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:26:16: 
+   26 |    always_comb out1 = d;   
+      |                ^~~~
+                      t/t_lint_always_comb_multidriven.v:25:11: ... Location of other write
+   25 |    assign out1 = 1'b0;
+      |           ^~~~
+                      ... For warning description see https://verilator.org/warn/MULTIDRIVEN?v=latest
+                      ... Use "/* verilator lint_off MULTIDRIVEN */" and lint_on around source to disable this message.
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:29:16: Variable written to in always_comb also written by other process (IEEE 1800-2017 9.2.2.2): 'out2'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:29:16: 
+   29 |    always_comb out2 = 1'b0;   
+      |                ^~~~
+                      t/t_lint_always_comb_multidriven.v:28:11: ... Location of other write
+   28 |    assign out2 = d;
+      |           ^~~~
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:32:11: Variable also written to in always_comb (IEEE 1800-2017 9.2.2.2): 'out3'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:32:11: 
+   32 |    assign out3 = 1'b0;   
+      |           ^~~~
+                      t/t_lint_always_comb_multidriven.v:31:16: ... Location of always_comb write
+   31 |    always_comb out3 = d;
+      |                ^~~~
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:35:11: Variable also written to in always_comb (IEEE 1800-2017 9.2.2.2): 'out4'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:35:11: 
+   35 |    assign out4 = d;   
+      |           ^~~~
+                      t/t_lint_always_comb_multidriven.v:34:16: ... Location of always_comb write
+   34 |    always_comb out4 = 1'b0;
+      |                ^~~~
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:38:16: Variable written to in always_comb also written by other process (IEEE 1800-2017 9.2.2.2): 'out5'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:38:16: 
+   38 |    always_comb out5 = d;   
+      |                ^~~~
+                      t/t_lint_always_comb_multidriven.v:37:16: ... Location of other write
+   37 |    always_comb out5 = 1'b0;
+      |                ^~~~
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:41:16: Variable written to in always_comb also written by other process (IEEE 1800-2017 9.2.2.2): 'out6'
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:41:16: 
+   41 |    always_comb out6 = 1'b0;   
+      |                ^~~~
+                      t/t_lint_always_comb_multidriven.v:40:16: ... Location of other write
+   40 |    always_comb out6 = d;
+      |                ^~~~
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:17:15: Bits [0:0] of signal 'out2' have multiple combinational drivers
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:28:16: ... Location of first driver
+   28 |    assign out2 = d;
+      |                ^
+                      t/t_lint_always_comb_multidriven.v:29:21: ... Location of other driver
+   29 |    always_comb out2 = 1'b0;   
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:17:15: ... Only the first driver will be respected
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:19:15: Bits [0:0] of signal 'out4' have multiple combinational drivers
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:34:21: ... Location of first driver
+   34 |    always_comb out4 = 1'b0;
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:35:16: ... Location of other driver
+   35 |    assign out4 = d;   
+      |                ^
+                      t/t_lint_always_comb_multidriven.v:19:15: ... Only the first driver will be respected
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:20:15: Bits [0:0] of signal 'out5' have multiple combinational drivers
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:37:21: ... Location of first driver
+   37 |    always_comb out5 = 1'b0;
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:38:21: ... Location of other driver
+   38 |    always_comb out5 = d;   
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:20:15: ... Only the first driver will be respected
+%Warning-MULTIDRIVEN: t/t_lint_always_comb_multidriven.v:21:15: Bits [0:0] of signal 'out6' have multiple combinational drivers
+                                                              : ... In instance t
+                      t/t_lint_always_comb_multidriven.v:40:21: ... Location of first driver
+   40 |    always_comb out6 = d;
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:41:21: ... Location of other driver
+   41 |    always_comb out6 = 1'b0;   
+      |                     ^
+                      t/t_lint_always_comb_multidriven.v:21:15: ... Only the first driver will be respected
+%Error: Exiting due to

test_regress/t/t_lint_always_comb_multidriven.pl

@@ -0,0 +1,20 @@
+#!/usr/bin/env perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2023 by Wilson Snyder. 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-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+scenarios(linter => 1);
+
+lint(
+    verilator_flags2 => ['--lint-only'],
+    fails => 1,
+    expect_filename => $Self->{golden_filename},
+    );
+
+ok(1);
+1;

test_regress/t/t_lint_always_comb_multidriven.v

@@ -0,0 +1,76 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2012 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
+
+module t (/*AUTOARG*/
+   // Outputs
+   out1, out2, out3, out4, out5, out6, out7, out8,
+   // Inputs
+   clk, d
+   );
+
+   input clk;
+   input d;
+   output reg out1;
+   output reg out2;
+   output reg out3;
+   output reg out4;
+   output reg out5;
+   output reg out6;
+   output reg out7;
+   output reg out8;
+
+   assign out1 = 1'b0;
+   always_comb out1 = d;  // <--- Warning
+
+   assign out2 = d;
+   always_comb out2 = 1'b0;  // <--- Warning
+
+   always_comb out3 = d;
+   assign out3 = 1'b0;  // <--- Warning
+
+   always_comb out4 = 1'b0;
+   assign out4 = d;  // <--- Warning
+
+   always_comb out5 = 1'b0;
+   always_comb out5 = d;  // <--- Warning
+
+   always_comb out6 = d;
+   always_comb out6 = 1'b0;  // <--- Warning
+
+   always_comb begin
+      out7 = 1'b0;
+      out7 = d;
+   end
+
+   always_comb begin
+      out8 = d;
+      out8 = 1'b0;
+   end
+
+   reg [1:0] arr_packed;
+   reg arr_unpacked [0:1];
+   reg [1:0] gen_arr_packed;
+   reg gen_arr_unpacked [0:1];
+   genvar g;
+
+   always_comb begin
+      arr_packed[0] = d;
+      arr_packed[1] = d;
+   end
+
+   always_comb begin
+      arr_unpacked[0] = d;
+      arr_unpacked[1] = d;
+   end
+
+   generate
+      for (g=0; g<2; ++g) begin
+     	 always_comb gen_arr_packed[g] = d;
+     	 always_comb gen_arr_unpacked[g] = d;
+      end
+   endgenerate
+
+endmodule

test_regress/t/t_public_seq.v

@@ -37,6 +37,8 @@ module t (
    end
 
    always_ff @(posedge dummy_clk) begin
+      // verilator lint_off MULTIDRIVEN
       comb_byte = ~pub_byte;
+      // verilator lint_on MULTIDRIVEN
    end
 endmodule

test_regress/t/t_timing_debug1.out

@@ -11,7 +11,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___eval_initial__TOP__1
 -V{t#,#}         Suspending process waiting for @(posedge t.clk1) at t/t_timing_sched.v:17
 -V{t#,#}+    Vt_timing_debug1___024root___eval_initial__TOP__2
--V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:46
+-V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_initial__TOP__3
 -V{t#,#}+    Vt_timing_debug1___024root___eval_settle
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__stl
@@ -45,7 +45,7 @@
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:18
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:17
 -V{t#,#}         Committing processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_sequent__TOP__0
@@ -74,7 +74,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 3: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 3: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 3: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -134,7 +134,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 6: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 6: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 7: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:10
@@ -173,7 +173,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 7: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 7: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 9: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:10
@@ -207,7 +207,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 9: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 9: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:10
@@ -259,7 +259,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 11: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 12: Process waiting at t/t_timing_sched.v:10
@@ -283,11 +283,11 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Resuming processes waiting for @(posedge t.clk2)
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Suspending process waiting for @(posedge t.clk1) at t/t_timing_sched.v:18
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
@@ -324,15 +324,15 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 12: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 12: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 12: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:13
--V{t#,#}             Awaiting time 13: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Awaiting time 13: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Resuming delayed processes
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:13
--V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:46
+-V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -340,7 +340,7 @@
 -V{t#,#}         'act' region trigger index 0 is active: @([hybrid] __VassignWtmp_t.clk1__0)
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}         Committing processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_sequent__TOP__0
@@ -367,7 +367,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 13: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 13: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 15: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:10
@@ -400,7 +400,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 15: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 15: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}         Resuming delayed processes
@@ -457,7 +457,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 18: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 18: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 19: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -495,7 +495,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 19: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 19: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 21: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -528,7 +528,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 21: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 21: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -579,7 +579,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 22: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 25: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 24: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -617,7 +617,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 24: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 24: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 25: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:13
@@ -655,7 +655,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 25: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 25: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 27: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
@@ -688,7 +688,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 27: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 27: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -739,7 +739,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 30: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 30: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 31: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -777,7 +777,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 31: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 31: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -810,7 +810,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 33: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -840,11 +840,11 @@
 -V{t#,#}         Resuming processes waiting for @(posedge t.clk1)
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:17
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Resuming processes waiting for @(posedge t.clk2)
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Suspending process waiting for @(posedge t.clk1) at t/t_timing_sched.v:18
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
@@ -883,14 +883,14 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 34: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 34: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 36: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
--V{t#,#}             Awaiting time 37: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Awaiting time 37: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Resuming delayed processes
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
--V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:46
+-V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -898,7 +898,7 @@
 -V{t#,#}         No triggers active
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}         Committing processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_nba
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -917,7 +917,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 36: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 36: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 37: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -955,7 +955,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 37: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 37: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 39: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -988,7 +988,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 39: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 39: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}         Resuming delayed processes
@@ -1045,7 +1045,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 42: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 42: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 43: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1083,7 +1083,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 43: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 43: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 45: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -1116,7 +1116,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 44: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 45: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -1153,7 +1153,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 45: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 45: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}         Resuming delayed processes
@@ -1204,7 +1204,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 48: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 48: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 49: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1242,7 +1242,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 49: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 49: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 51: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -1275,7 +1275,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 51: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 51: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -1326,7 +1326,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 54: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 54: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1364,7 +1364,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 55: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 57: Process waiting at t/t_timing_sched.v:10
@@ -1390,11 +1390,11 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Resuming processes waiting for @(posedge t.clk2)
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Suspending process waiting for @(posedge t.clk1) at t/t_timing_sched.v:18
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
@@ -1431,13 +1431,13 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 56: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 56: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 57: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:13
--V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Resuming delayed processes
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
--V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:46
+-V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -1445,7 +1445,7 @@
 -V{t#,#}         No triggers active
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}         Committing processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_nba
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -1464,7 +1464,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 57: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 57: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:13
 -V{t#,#}         Resuming delayed processes
@@ -1521,7 +1521,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 60: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 60: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 61: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1559,7 +1559,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 61: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 61: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 63: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -1592,7 +1592,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 63: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 63: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -1643,7 +1643,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 67: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 66: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1685,7 +1685,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 67: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 67: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 69: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:13
@@ -1718,7 +1718,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 69: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 69: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -1769,7 +1769,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 72: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 72: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 73: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:17
@@ -1807,7 +1807,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 73: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 73: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 75: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
@@ -1840,7 +1840,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 75: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 75: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}         Resuming delayed processes
@@ -1891,7 +1891,7 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 77: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 79: Process waiting at t/t_timing_sched.v:17
@@ -1913,11 +1913,11 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Ready processes waiting for @(posedge t.clk2):
 -V{t#,#}           - Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Resuming processes waiting for @(posedge t.clk2)
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:18
 -V{t#,#}         Suspending process waiting for @(posedge t.clk1) at t/t_timing_sched.v:18
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
@@ -1954,17 +1954,17 @@
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}         Delayed processes:
--V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:48
+-V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:52
 -V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 79: Process waiting at t/t_timing_sched.v:10
 -V{t#,#}             Awaiting time 88: Process waiting at t/t_timing_sched.v:13
--V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Awaiting time 78: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}         Resuming delayed processes
--V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:46
+-V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:50
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:13
 *-* All Finished *-*
 -V{t#,#}             Resuming: Process waiting at t/t_timing_sched.v:10
--V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:46
+-V{t#,#}         Suspending process waiting for @(posedge t.clk2) at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_comb__TOP__0
 -V{t#,#}+    Vt_timing_debug1___024root___eval_triggers__act
@@ -1972,7 +1972,7 @@
 -V{t#,#}         'act' region trigger index 0 is active: @([hybrid] __VassignWtmp_t.clk1__0)
 -V{t#,#}+    Vt_timing_debug1___024root___timing_commit
 -V{t#,#}         Committing processes waiting for @(posedge t.clk2):
--V{t#,#}           - Process waiting at t/t_timing_sched.v:46
+-V{t#,#}           - Process waiting at t/t_timing_sched.v:50
 -V{t#,#}+    Vt_timing_debug1___024root___timing_resume
 -V{t#,#}+    Vt_timing_debug1___024root___eval_act
 -V{t#,#}+    Vt_timing_debug1___024root___act_sequent__TOP__0

test_regress/t/t_timing_sched.v

@@ -19,7 +19,9 @@ module t;
 
    int a2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        a2 = a1 << 1;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] a2 = %0d", $time, a2);
 `endif
@@ -27,7 +29,9 @@ module t;
 
    int b2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        b2 = b1 << 2;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] b2 = %0d", $time, b2);
 `endif

test_regress/t/t_timing_sched_if.v

@@ -25,7 +25,9 @@ module t;
 
    int a2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        a2 = a1 << 1;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] a2 = %0d", $time, a2);
 `endif
@@ -33,7 +35,9 @@ module t;
 
    int b2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        b2 = b1 << 2;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] b2 = %0d", $time, b2);
 `endif
@@ -41,7 +45,9 @@ module t;
 
    int c2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        c2 = c1 << 3;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] c2 = %0d", $time, c2);
 `endif

test_regress/t/t_timing_sched_nba.v

@@ -19,7 +19,9 @@ module t;
 
    int a2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        a2 = a1 << 1;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] a2 = %0d", $time, a2);
 `endif
@@ -27,7 +29,9 @@ module t;
 
    int b2 = 0;
    always_comb begin
+       // verilator lint_off MULTIDRIVEN
        b2 = b1 << 2;
+       // verilator lint_on MULTIDRIVEN
 `ifdef TEST_VERBOSE
        $display("[%0t] b2 = %0d", $time, b2);
 `endif