Change verilator_coverage to optimized executable (#8542)

docs/guide/exe_verilator_coverage.rst

@@ -131,6 +131,14 @@ verilator_coverage Arguments
 
    This option should be used together with :option:`--annotate`.
 
+.. option:: --debug
+
+   Runs the debug executable and enables debugging messages.
+
+.. option:: --debugi <level>
+
+   Runs the debug executable and sets the debugging level.
+
 .. option:: --filter-type <regex>
 
    Keeps records of coverage types that matches with <regex>

docs/guide/install-cmake.rst

@@ -59,6 +59,11 @@ To build using ninja:
    cmake --install . --prefix $PWD/../install
 
 
+For coverage tools, use ``CMAKE_BUILD_TYPE=CoverageRelease`` to build
+``verilator_coverage_bin`` or ``CMAKE_BUILD_TYPE=Coverage`` to build
+``verilator_coverage_bin_dbg``.
+
+
 .. _cmake usage:
 
 Usage