---
name: "llvm-mc-3.5"
section: "1"
platform: "linux"
package: "llvm-3.5"
version: "1:3.5-10"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/llvm-mc-3.5"
---

# llvm-mc-3.5(1)

manual page for llvm-mc 3.5

## NAME

llvm-mc - manual page for llvm-mc 3.5

## DESCRIPTION

OVERVIEW: llvm machine code playground

USAGE: llvm-mc \[options\] \<input file\>

### OPTIONS:

**-I=**\<directory\>                                  - Directory of include files

**-aarch64-neon-syntax**                            - Choose style of NEON code to emit from AArch64 backend:

- \=generic

  \-   Emit generic NEON assembly

- \=apple

  \-   Emit Apple-style NEON assembly

**-arch=**\<string\>                                  - Target arch to assemble for, see **-version** for available targets

**-asm-instrumentation**                            - Instrumentation of inline assembly and assembly source files

- \=none

  \-   no instrumentation at all

- \=address

  \-   instrument instructions with memory arguments

**-asm-show-inst**                                  - Emit internal instruction representation to assembly file

**-bounds-checking-single-trap**                    - Use one trap block per function

**-code-model**                                     - Choose code model

- \=default

  \-   Target default code model

- \=small

  \-   Small code model

- \=kernel

  \-   Kernel code model

- \=medium

  \-   Medium code model

- \=large

  \-   Large code model

**-compress-debug-sections**                        - Compress DWARF debug sections

**-cppfname=**\<function name\>                       - Specify the name of the generated function

**-cppfor=**\<string\>                                - Specify the name of the thing to generate

**-cppgen**                                         - Choose what kind of output to generate

- \=program

  \-   Generate a complete program

- \=module

  \-   Generate a module definition

- \=contents

  \-   Generate contents of a module

- \=function

  \-   Generate a function definition

- \=functions

  \-   Generate all function definitions

- \=inline

  \-   Generate an inline function

- \=variable

  \-   Generate a variable definition

- \=type

  \-   Generate a type definition

**-disable-spill-fusing**                           - Disable fusing of spill code into instructions

**-dwarf-version=**\<int\>                            - Dwarf version

**-enable-load-pre**                                -

**-enable-misched**                                 - Enable the machine instruction scheduling pass.

**-enable-objc-arc-opts**                           - enable/disable all ARC Optimizations

**-enable-tbaa**                                    -

**-exhaustive-register-search**                     - Exhaustive Search for registers bypassing the depth and interference cutoffs of last chance recoloring

**-fatal-assembler-warnings**                       - Consider warnings as error

**-fdebug-compilation-dir=**\<string\>                - Specifies the debug info's compilation dir

**-filetype**                                       - 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 debugging info for assembly source files

**-help**                                           - Display available options (**-help-hidden** for more)

**-internalize-public-api-file=**\<filename\>         - A file containing list of symbol names to preserve

**-internalize-public-api-list=**\<list\>             - A list of symbol names to preserve

**-join-liveintervals**                             - Coalesce copies (default=true)

**-limit-float-precision=**\<uint\>                   - Generate low-precision inline sequences for some float libcalls

**-main-file-name=**\<string\>                        - Specifies the name we should consider the input file

**-mattr=**\<a1,+a2,-a3,...\>                         - Target specific attributes (**-mattr**=*help* for details)

**-mc-relax-all**                                   - When used with filetype=obj, relax all fixups in the emitted object file

**-mc-x86-disable-arith-relaxation**                - Disable relaxation of arithmetic instruction for X86

**-mcpu=**\<cpu-name\>                                - Target a specific cpu type (**-mcpu**=*help* for details)

-

  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 disassembly of strings of hex bytes

**-mips16-constant-islands**                        - MIPS: mips16 constant islands enable.

**-mips16-hard-float**                              - MIPS: mips16 hard float enable.

**-mlsm**                                           - Enable motion of merged load and store

**-mno-ldc1-sdc1**                                  - Expand double precision loads and stores to their single precision counterparts

**-n**                                              - Don't assume assembly file starts in the text section

**-no-discriminators**                              - Disable generation of discriminator information.

**-no-exec-stack**                                  - File doesn't need an exec stack

**-nvptx-sched4reg**                                - NVPTX Specific: schedule for register pressue

**-o=**\<filename\>                                   - Output filename

**-output-asm-variant=**\<uint\>                      - Syntax variant to use for output printing

**-print-after-all**                                - Print IR after each pass

**-print-before-all**                               - Print IR before each pass

**-print-imm-hex**                                  - Prefer hex format for immediate values

**-print-machineinstrs=**\<pass-name\>                - Print machine instrs

**-regalloc**                                       - Register allocator to use

- \=default

  \-   pick register allocator based on **-O** option

- \=basic

  \-   basic register allocator

- \=fast

  \-   fast register allocator

- \=greedy

  \-   greedy register allocator

- \=pbqp

  \-   PBQP register allocator

**-relocation-model**                               - Choose relocation model

- \=default

  \-   Target default relocation model

- \=static

  \-   Non-relocatable code

- \=pic

  \-   Fully relocatable, position independent code

- \=dynamic-no-pic

  \-   Relocatable external references, non-relocatable code

**-rng-seed=**\<seed\>                                - Seed for the random number generator

**-sample-profile-max-propagate-iterations=**\<uint\> - Maximum number of iterations to go through when propagating sample block/edge weights through the CFG.

**-save-temp-labels**                               - Don't discard temporary labels

**-show-encoding**                                  - Show instruction encodings

**-show-inst**                                      - Show internal instruction representation

**-show-inst-operands**                             - Show instructions operands as parsed

**-spiller**                                        - Spiller to use: (default: standard)

- \=trivial

  \-   trivial spiller

- \=inline

  \-   inline spiller

**-stackmap-version=**\<int\>                         - Specify the stackmap encoding version (default = 1)

**-stats**                                          - Enable statistics output from program (available with Asserts)

**-time-passes**                                    - Time each pass, printing elapsed time for each on exit

**-triple=**\<string\>                                - Target triple to assemble for, see **-version** for available targets

**-verify-debug-info**                              -

**-verify-dom-info**                                - Verify dominator info (time consuming)

**-verify-loop-info**                               - Verify loop info (time consuming)

**-verify-regalloc**                                - Verify during register allocation

**-verify-region-info**                             - Verify region info (time consuming)

**-verify-scev**                                    - Verify ScalarEvolution's backedge taken counts (slow)

**-version**                                        - Display the version of this program

**-x86-asm-syntax**                                 - Choose style of code to emit from X86 backend:

- \=att

  \-   Emit AT&T-style assembly

- \=intel

  \-   Emit Intel-style assembly

## SEE ALSO

The full documentation for **llvm-mc** is maintained as a Texinfo manual.  If the **info** and **llvm-mc** programs are properly installed at your site, the command

-

  **info llvm-mc**

should give you access to the complete manual.