---
name: "llvm-mc-3.4"
section: "1"
platform: "linux"
package: "llvm-3.4"
version: "1:3.4.2-13"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/llvm-mc-3.4"
---

# llvm-mc-3.4(1)

manual page for llvm-mc 3.4

## NAME

llvm-mc - manual page for llvm-mc 3.4

## DESCRIPTION

OVERVIEW: llvm machine code playground

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

### OPTIONS:

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

**-L**                                      - Don't discard temporary labels

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

**-asm-verbose**                            - Add comments to directives.

**-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

**-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-cfi**                            - Do not use .cfi\_\* directives

**-disable-debug-info-verifier**            -

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

**-enable-correct-eh-support**              - Make the **-lowerinvoke** pass insert expensive, but correct, EH code

**-enable-load-pre**                        -

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

**-enable-tbaa**                            -

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

**-fdata-sections**                         - Emit data into separate sections

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

**-ffunction-sections**                     - Emit functions into separate sections

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

**-mc-relax-all**                           - Relax all fixups

**-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

**-hdis**                                 - Disassemble strings of hex bytes printing immediates as hex

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

**-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

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

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

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

**-pre-RA-sched**                           - Instruction schedulers available (before register allocation):

- \=vliw-td

  \-   VLIW scheduler

- \=list-ilp

  \-   Bottom-up register pressure aware list scheduling which tries to balance ILP and register pressure

- \=list-hybrid

  \-   Bottom-up register pressure aware list scheduling which tries to balance latency and register pressure

- \=source

  \-   Similar to list-burr but schedules in source order when possible

- \=list-burr

  \-   Bottom-up register reduction list scheduling

- \=linearize

  \-   Linearize DAG, no scheduling

- \=fast

  \-   Fast suboptimal list scheduling

- \=default

  \-   Best scheduler for the target

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

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

**-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

**-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

**-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-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.