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-llvm-profdata - Profile data tool
-=================================
-
-SYNOPSIS
---------
-
-:program:`llvm-profdata` *command* [*args...*]
-
-DESCRIPTION
------------
-
-The :program:`llvm-profdata` tool is a small utility for working with profile
-data files.
-
-COMMANDS
---------
-
-* :ref:`merge <profdata-merge>`
-* :ref:`show <profdata-show>`
-
-.. program:: llvm-profdata merge
-
-.. _profdata-merge:
-
-MERGE
------
-
-SYNOPSIS
-^^^^^^^^
-
-:program:`llvm-profdata merge` [*options*] [*filename...*]
-
-DESCRIPTION
-^^^^^^^^^^^
-
-:program:`llvm-profdata merge` takes several profile data files
-generated by PGO instrumentation and merges them together into a single
-indexed profile data file.
-
-By default profile data is merged without modification. This means that the
-relative importance of each input file is proportional to the number of samples
-or counts it contains. In general, the input from a longer training run will be
-interpreted as relatively more important than a shorter run. Depending on the
-nature of the training runs it may be useful to adjust the weight given to each
-input file by using the ``-weighted-input`` option.
-
-Profiles passed in via ``-weighted-input``, ``-input-files``, or via positional
-arguments are processed once for each time they are seen.
-
-
-OPTIONS
-^^^^^^^
-
-.. option:: -help
-
- Print a summary of command line options.
-
-.. option:: -output=output, -o=output
-
- Specify the output file name.  *Output* cannot be ``-`` as the resulting
- indexed profile data can't be written to standard output.
-
-.. option:: -weighted-input=weight,filename
-
- Specify an input file name along with a weight. The profile counts of the
- supplied ``filename`` will be scaled (multiplied) by the supplied
- ``weight``, where where ``weight`` is a decimal integer >= 1.
- Input files specified without using this option are assigned a default
- weight of 1. Examples are shown below.
-
-.. option:: -input-files=path, -f=path
-
-  Specify a file which contains a list of files to merge. The entries in this
-  file are newline-separated. Lines starting with '#' are skipped. Entries may
-  be of the form <filename> or <weight>,<filename>.
-
-.. option:: -remapping-file=path, -r=path
-
-  Specify a file which contains a remapping from symbol names in the input
-  profile to the symbol names that should be used in the output profile. The
-  file should consist of lines of the form ``<input-symbol> <output-symbol>``.
-  Blank lines and lines starting with ``#`` are skipped.
-
-  The :doc:`llvm-cxxmap <llvm-cxxmap>` tool can be used to generate the symbol
-  remapping file.
-
-.. option:: -instr (default)
-
- Specify that the input profile is an instrumentation-based profile.
-
-.. option:: -sample
-
- Specify that the input profile is a sample-based profile.
- 
- The format of the generated file can be generated in one of three ways:
-
- .. option:: -binary (default)
-
- Emit the profile using a binary encoding. For instrumentation-based profile
- the output format is the indexed binary format. 
-
- .. option:: -text
-
- Emit the profile in text mode. This option can also be used with both
- sample-based and instrumentation-based profile. When this option is used
- the profile will be dumped in the text format that is parsable by the profile
- reader.
-
- .. option:: -gcc
-
- Emit the profile using GCC's gcov format (Not yet supported).
-
-.. option:: -sparse[=true|false]
-
- Do not emit function records with 0 execution count. Can only be used in
- conjunction with -instr. Defaults to false, since it can inhibit compiler
- optimization during PGO.
-
-.. option:: -num-threads=N, -j=N
-
- Use N threads to perform profile merging. When N=0, llvm-profdata auto-detects
- an appropriate number of threads to use. This is the default.
-
-EXAMPLES
-^^^^^^^^
-Basic Usage
-+++++++++++
-Merge three profiles:
-
-::
-
-    llvm-profdata merge foo.profdata bar.profdata baz.profdata -output merged.profdata
-
-Weighted Input
-++++++++++++++
-The input file `foo.profdata` is especially important, multiply its counts by 10:
-
-::
-
-    llvm-profdata merge -weighted-input=10,foo.profdata bar.profdata baz.profdata -output merged.profdata
-
-Exactly equivalent to the previous invocation (explicit form; useful for programmatic invocation):
-
-::
-
-    llvm-profdata merge -weighted-input=10,foo.profdata -weighted-input=1,bar.profdata -weighted-input=1,baz.profdata -output merged.profdata
-
-.. program:: llvm-profdata show
-
-.. _profdata-show:
-
-SHOW
-----
-
-SYNOPSIS
-^^^^^^^^
-
-:program:`llvm-profdata show` [*options*] [*filename*]
-
-DESCRIPTION
-^^^^^^^^^^^
-
-:program:`llvm-profdata show` takes a profile data file and displays the
-information about the profile counters for this file and
-for any of the specified function(s).
-
-If *filename* is omitted or is ``-``, then **llvm-profdata show** reads its
-input from standard input.
-
-OPTIONS
-^^^^^^^
-
-.. option:: -all-functions
-
- Print details for every function.
-
-.. option:: -counts
-
- Print the counter values for the displayed functions.
-
-.. option:: -function=string
-
- Print details for a function if the function's name contains the given string.
-
-.. option:: -help
-
- Print a summary of command line options.
-
-.. option:: -output=output, -o=output
-
- Specify the output file name.  If *output* is ``-`` or it isn't specified,
- then the output is sent to standard output.
-
-.. option:: -instr (default)
-
- Specify that the input profile is an instrumentation-based profile.
-
-.. option:: -text
-
- Instruct the profile dumper to show profile counts in the text format of the
- instrumentation-based profile data representation. By default, the profile
- information is dumped in a more human readable form (also in text) with
- annotations.
-
-.. option:: -topn=n
-
- Instruct the profile dumper to show the top ``n`` functions with the
- hottest basic blocks in the summary section. By default, the topn functions
- are not dumped.
-
-.. option:: -sample
-
- Specify that the input profile is a sample-based profile.
-
-.. option:: -memop-sizes
-
- Show the profiled sizes of the memory intrinsic calls for shown functions.
-
-.. option:: -value-cutoff=n
-
- Show only those functions whose max count values are greater or equal to ``n``.
- By default, the value-cutoff is set to 0.
-
-.. option:: -list-below-cutoff
-
- Only output names of functions whose max count value are below the cutoff
- value.
-
-EXIT STATUS
------------
-
-:program:`llvm-profdata` returns 1 if the command is omitted or is invalid,
-if it cannot read input files, or if there is a mismatch between their data.