Tests: Rename control files to .vc. No test function change.

test_regress/t/t_hier_block_import.py

@@ -21,7 +21,7 @@ test.setenv('TEST_ROOT', test.t_dir + "/t_hier_block_import")
 # So use 6 threads here though it's not optimal in performance, but ok.
 
 test.compile(verilator_flags2=[
-    '$TEST_ROOT/t_hier_block_import_def.vh', '-f $TEST_ROOT/t_hier_block_import_args.f',
+    '$TEST_ROOT/t_hier_block_import_def.vh', '-f $TEST_ROOT/t_hier_block_import_args.vc',
     '-I$TEST_ROOT'
 ],
              threads=(6 if test.vltmt else 1))

test_regress/t/t_hier_block_import_cmake.py

@@ -22,7 +22,7 @@ test.compile(verilator_make_cmake=True,
              verilator_make_gmake=False,
              verilator_flags2=[
                  '$TEST_ROOT/t_hier_block_import_def.vh',
-                 '-f $TEST_ROOT/t_hier_block_import_args.f', '-I$TEST_ROOT'
+                 '-f $TEST_ROOT/t_hier_block_import_args.vc', '-I$TEST_ROOT'
              ],
              threads=(6 if test.vltmt else 1))
 

test_regress/t/t_hier_trace.py

@@ -13,7 +13,7 @@ test.scenarios('simulator')
 
 test.compile(verilator_flags2=[
     '--trace-vcd', '-j 4', 't/t_hier_trace_sub/t_hier_trace.vlt', '--top-module t',
-    '--hierarchical', '-F t/t_hier_trace_sub/top.F'
+    '--hierarchical', '-F t/t_hier_trace_sub/top.vc'
 ])
 
 test.execute(all_run_flags=['-j 4'])

test_regress/t/t_hier_trace_noinl.py

@@ -14,7 +14,7 @@ test.top_filename = "t/t_hier_trace.v"
 
 test.compile(verilator_flags2=[
     '--trace-vcd', '-j 4', 't/t_hier_trace_sub/t_hier_trace.vlt', '--top-module t',
-    '--hierarchical', '--fno-inline', '-F t/t_hier_trace_sub/top.F'
+    '--hierarchical', '--fno-inline', '-F t/t_hier_trace_sub/top.vc'
 ])
 
 test.execute(all_run_flags=['-j 4'])

test_regress/t/t_hier_trace_sub/top.vc

@@ -4,4 +4,4 @@
 # Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
--F sub.F
+-F sub.vc