LLVM-MC(1) User Commands LLVM-MC(1)
NAME
llvm-mc - manual page for llvm-mc 16
DESCRIPTION
OVERVIEW: llvm machine code playground
USAGE: llvm-mc [options] <input file>
OPTIONS:
Color Options:
--color - Use colors in out-
put (default=autodetect)
Generic Options:
--help - Display available
options (--help-hidden for more)
--help-list - Display list of
available options (--help-list-hidden for more)
--version - Display the version
of this program
MC Options:
-I <directory> - Directory of in-
clude files
-M <string> - Disassembler op-
tions
--arch=<string> - Target arch to as-
semble for, see -version for available targets
Action to perform:
--as-lex - Lex tokens from a .s
file
--assemble - Assemble a .s file
(default)
--disassemble - Disassemble strings
of hex bytes
--mdis - Marked up disassem-
bly of strings of hex bytes
--compress-debug-sections=<value> - Choose DWARF debug
sections compression:
=none - No compression
=zlib - Use zlib
=zstd - Use zstd
--defsym=<string> - Defines a symbol to
be an integer constant
--fdebug-compilation-dir=<string> - Specifies the debug
info's compilation dir
--fdebug-prefix-map=<= separated key-value pairs> - Map file source
paths in debug info
--filetype=<value> - Choose an output
file type:
=asm - Emit an assembly ('.s') file
=null - Don't emit anything (for timing purposes)
=obj - Emit a native object ('.o') file
-g - Generate dwarf de-
bugging info for assembly source files
--large-code-model - Create cfi direc-
tives that assume the code might be more than 2gb away
--main-file-name=<string> - Specifies the name
we should consider the input file
--masm-hexfloats - Enable MASM-style
hex float initializers (3F800000r)
--masm-integers - Enable binary and
hex masm integers (0b110 and 0ABCh)
--mattr=<a1,+a2,-a3,...> - Target specific at-
tributes (-mattr=help for details)
--mcpu=<cpu-name> - Target a specific
cpu type (-mcpu=help for details)
--motorola-integers - Enable binary and
hex Motorola integers (%110 and $ABC)
-n - Don't assume assem-
bly file starts in the text section
--no-exec-stack - File doesn't need
an exec stack
-o <filename> - Output filename
--output-asm-variant=<uint> - Syntax variant to
use for output printing
--position-independent - Position indepen-
dent
--preserve-comments - Preserve Comments
in outputted assembly
--print-imm-hex - Prefer hex format
for immediate values
--relax-relocations - Emit R_X86_64_GOT-
PCRELX instead of R_X86_64_GOTPCREL
--save-temp-labels - Don't discard tem-
porary labels
--show-encoding - Show instruction
encodings
--show-inst - Show internal in-
struction representation
--show-inst-operands - Show instructions
operands as parsed
--split-dwarf-file=<filename> - DWO output filename
--triple=<string> - Target triple to
assemble for, see -version for available targets
llvm-mc 16 October 2023 LLVM-MC(1)
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