[docs][llvm-dwarfdump] Add missing options and behaviour to llvm-dwarfdump documentation

[jhenderson]

Summary

This fixes https://bugs.llvm.org/show_bug.cgi?id=42185.

llvm-dwarfdump's documentation was missing a number of options and other behaviours. This change tries to fix up the documentation by adding these missing items.

llvm/trunk/docs/CommandGuide/llvm-dwarfdump.rst

 llvm-dwarfdump - dump and verify DWARF debug information
 ========================================================
 
 SYNOPSIS
 --------
 
 :program:`llvm-dwarfdump` [*options*] [*filename ...*]
 
 DESCRIPTION
 -----------
 
 :program:`llvm-dwarfdump` parses DWARF sections in object files,
 archives, and `.dSYM` bundles and prints their contents in
 human-readable form. Only the .debug_info section is printed unless one of
 the section-specific options or :option:`--all` is specified.
 
+If no input file is specified, `a.out` is used instead. If `-` is used as the
+input file, :program:`llvm-dwarfdump` reads the input from its standard input
+stream.
+
 OPTIONS
 -------
 
 .. option:: -a, --all
 
             Disassemble all supported DWARF sections.
 
 .. option:: --arch=<arch>
 
             Dump DWARF debug information for the specified CPU architecture.
             Architectures may be specified by name or by number.  This
             option can be specified multiple times, once for each desired
             architecture.  All CPU architectures will be printed by
             default.
 
 .. option:: -c, --show-children
 
             Show a debug info entry's children when using
             the :option:`--debug-info`, :option:`--find`,
             and :option:`--name` options.
 
+.. option:: --color
+
+            Use colors in output.
+
 .. option:: -f <name>, --find=<name>
 
             Search for the exact text <name> in the accelerator tables
             and print the matching debug information entries.
             When there is no accelerator tables or the name of the DIE
             you are looking for is not found in the accelerator tables,
             try using the slower but more complete :option:`--name` option.
 
 .. option:: -F, --show-form
 
             Show DWARF form types after the DWARF attribute types.
 
 .. option:: -h, --help
 
             Show help and usage for this command.
 
+.. option:: --help-list
+
+            Show help and usage for this command without grouping the options
+            into categories.
+
 .. option:: -i, --ignore-case
 
             Ignore case distinctions when searching.
 
 .. option:: -n <pattern>, --name=<pattern>
 
             Find and print all debug info entries whose name
             (`DW_AT_name` attribute) matches the exact text in
             <pattern>. Use the :option:`--regex` option to have
             <pattern> become a regular expression for more flexible
             pattern matching.
 
 .. option:: --lookup=<address>
 
             Lookup <address> in the debug information and print out the file,
             function, block, and line table details.
 
 .. option:: -o <path>
 
-            Redirect output to a file specified by <path>.
+            Redirect output to a file specified by <path>, where `-` is the
+            standard output stream.
 
 .. option:: -p, --show-parents
 
             Show a debug info entry's parent objects when using the
             :option:`--debug-info`, :option:`--find`, and
             :option:`--name` options.
 
-.. option:: -r <n>, --recurse-depth=<n>
+.. option:: --parent-recurse-depth=<N>
+
+            Only recurse to a maximum depth of <N> when displaying parents of
+            debug info entries.
+
+.. option:: --quiet
 
-            Only recurse to a maximum depth of <n> when dumping debug info
+            Use with :option:`--verify` to not emit to `STDOUT`.
+
+.. option:: -r <N>, --recurse-depth=<N>
+
+            Only recurse to a maximum depth of <N> when dumping debug info
             entries.
 
 .. option:: --statistics
 
             Collect debug info quality metrics and print the results
             as machine-readable single-line JSON output.
 
+.. option:: --summarize-types
+
+            Abbreviate the description of type unit entries.
+
 .. option:: -x, --regex
 
             Treat any <pattern> strings as regular expressions when searching
             instead of just as an exact string match.
 
 .. option:: -u, --uuid
 
             Show the UUID for each architecture.
.. option:: --verify
             Verify the structure of the DWARF information by verifying the
             compile unit chains, DIE relationships graph, address
             ranges, and more.
 
 .. option:: --version
 
             Display the version of the tool.
 
-.. option:: --debug-abbrev, --debug-aranges, --debug-cu-index, --debug-frame [=<offset>], --debug-gnu-pubnames, --debug-gnu-pubtypes, --debug-info [=<offset>], --debug-line [=<offset>], --debug-loc [=<offset>], --debug-macro, --debug-pubnames, --debug-pubtypes, --debug-ranges, --debug-str, --debug-str-offsets, --debug-tu-index, --debug-types, --eh-frame, --gdb-index, --apple-names, --apple-types, --apple-namespaces, --apple-objc
+.. option:: --debug-abbrev, --debug-addr, --debug-aranges, --debug-cu-index, --debug-frame [=<offset>], --debug-gnu-pubnames, --debug-gnu-pubtypes, --debug-info [=<offset>], --debug-line [=<offset>], --debug-line-str, --debug-loc [=<offset>], --debug-loclists [=<offset>], --debug-macro, --debug-names, --debug-pubnames, --debug-pubtypes, --debug-ranges, --debug-rnglists, --debug-str, --debug-str-offsets, --debug-tu-index, --debug-types, --eh-frame [=<offset>], --gdb-index, --apple-names, --apple-types, --apple-namespaces, --apple-objc
 
             Dump the specified DWARF section by name. Only the
             `.debug_info` section is shown by default. Some entries
             support adding an `=<offset>` as a way to provide an
             optional offset of the exact entry to dump within the
             respective section. When an offset is provided, only the
             entry at that offset will be dumped, else the entire
             section will be dumped. Children of items at a specific
             offset can be dumped by also using the
             :option:`--show-children` option where applicable.
 
+.. option:: @<FILE>
+
+            Read command-line options from `<FILE>`.
+
 EXIT STATUS
 -----------
 
 :program:`llvm-dwarfdump` returns 0 if the input files were parsed and dumped
 successfully. Otherwise, it returns 1.
 
 SEE ALSO
 --------
 
 :manpage:`dsymutil(1)`