llvm-profgen - LLVM SPGO profile generation tool — LLVM 13 documentation

# llvm-profgen - LLVM SPGO profile generation tool

## SYNOPSIS

llvm-profgen [commands] [options]

## DESCRIPTION

The llvm-profgen utility generates a profile data file from given perf script data files for sample-based profile guided optimization(SPGO).

## COMMANDS

At least one of the following commands are required:

--perfscript=<string[,string,...]>

  Path of perf-script trace created by Linux perf tool with script command(the raw perf.data should be profiled with -b).

--binary=<string[,string,...]>

  Path of the input profiled binary files.

--output=<string>

  Path of the output profile file.

## OPTIONS

llvm-profgen supports the following options:

--format=[text|binary|extbinary|compbinary|gcc]

  Specify the format of the generated profile. Supported <format> are text, binary, extbinary, compbinary, gcc, see llvm-profdata for more descriptions of the format.

--show-mmap-events

  Print mmap events.

--show-disassembly

  Print disassembled code.

--x86-asm-syntax=[att|intel]

  Specify whether to print assembly code in AT&T syntax (the default) or Intel syntax.