llvm-profgen - Man Page

llvm-profgen [commands] [options]

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

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).

--etm=<string>

Path of the ETM trace file created by ARM CoreSight trace tools. Requires the OpenCSD library version 1.5.4 or higher to be enabled during the build.

--perfdata=<perfdata>, --pd

Path of raw perf data created by Linux perf tool (it should be profiled with -b).

--unsymbolized-profile=<unsymbolized profile>, --up

Path of the unsymbolized profile created by llvm-profgen with --skip-symbolization​.

--llvm-sample-profile=<llvm sample profile>

Path of the LLVM sample profile.

NOTE:

Only one of --perfscript, --perfdata, --unsymbolized-profile, --llvm-sample-profile, or --etm may be specified at a time.

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

Path of the input profiled binary files.

--output=<string>

Path of the output profile file.

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.

--debug-binary=<debug-binary>

Path of debug info binary. llvm-profgen will load the DWARF info from it instead of the executable binary.

--target-triple=<triple>

Override the target triple for the binary. This is useful for ETM trace decoding to specify the correct Arm M-profile target.

--pid

Process Id for the profiled executable binary.

--output=<output>

Path of the output profile file.

--data-access-perftrace=<data-access-perftrace>

File path of a Linux perf raw trace (generated by perf report -D) consisting of memory access events.

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

2003-2026, LLVM Project

The man page llvm-profgen-23(1) is an alias of llvm-profgen(1).