Provided by: llvm-8_8-3_amd64 bug

NAME

       llvm-profdata - Profile data tool

SYNOPSIS

       llvm-profdata command [args…]

DESCRIPTION

       The llvm-profdata tool is a small utility for working with profile data files.

COMMANDS

       · merge

       · show

MERGE

   SYNOPSIS
       llvm-profdata merge [options] [filename…]

   DESCRIPTION
       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
       -help  Print a summary of command line options.

       -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.

       -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.

       -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>.

       -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 llvm-cxxmap tool can be used to generate the symbol remapping file.

       -instr (default)
              Specify that the input profile is an instrumentation-based profile.

       -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:

              -binary (default)

              Emit  the  profile  using  a binary encoding. For instrumentation-based profile the
              output format is the indexed binary format.

              -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.

              -gcc

              Emit the profile using GCC’s gcov format (Not yet supported).

       -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.

       -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

SHOW

   SYNOPSIS
       llvm-profdata show [options] [filename]

   DESCRIPTION
       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
       -all-functions
              Print details for every function.

       -counts
              Print the counter values for the displayed functions.

       -function=string
              Print details for a function if the function’s name contains the given string.

       -help  Print a summary of command line options.

       -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.

       -instr (default)
              Specify that the input profile is an instrumentation-based profile.

       -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.

       -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.

       -sample
              Specify that the input profile is a sample-based profile.

       -memop-sizes
              Show the profiled sizes of the memory intrinsic calls for shown functions.

       -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.

       -list-below-cutoff
              Only output names of functions whose max count value are below the cutoff value.

EXIT STATUS

       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.

AUTHOR

       Maintained by the LLVM Team (https://llvm.org/).

COPYRIGHT

       2003-2019, LLVM Project