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LLVM-MC(1)			 User Commands			    LLVM-MC(1)

NAME
       llvm-mc - manual page for llvm-mc 4.0

DESCRIPTION
       OVERVIEW: llvm machine code playground

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

       OPTIONS:

       General 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

       -amdgpu-dump-rtmd				-  Dump AMDGPU runtime
	      metadata

       -amdgpu-spill-sgpr-to-smem		       - Use scalar stores  to
	      spill SGPRs if supported by subtarget

       -amdgpu-vgpr-index-mode			       - Use GPR indexing mode
	      instead of movrel for vector indexing

       -arch=<string>				       - Target arch to assem‐
	      ble for, see -version for available targets

       -arm-execute-only			       -

       -arm-implicit-it					 -  Allow  conditional
	      instructions outdside of an IT block

       =always
	      -	  Accept in both ISAs, emit implicit ITs in Thumb

       =never -	  Warn in ARM, reject in Thumb

       =arm   -	  Accept in ARM, reject in Thumb

       =thumb -	  Warn in ARM, emit implicit ITs in Thumb

       -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

       -color						-  use	colored syntax
	      highlighting (default=autodetect)

       -compress-debug-sections			       -  Choose  DWARF	 debug
	      sections compression:

       =none  -	  No compression

       =zlib  -	  Use zlib compression

       =zlib-gnu
	      -	  Use zlib-gnu compression (deprecated)

       -cvp-dont-process-adds			       -

       -defsym=<string>					-  Defines a symbol to
	      be an integer constant

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

	      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

       -dwarf-version=<int>			       - Dwarf version

       -enable-implicit-null-checks		       - Fold null checks into
	      faulting memory operations

       -enable-load-pre				       -

       -enable-name-compression			       -  Enable  name	string
	      compression

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

       -enable-scoped-noalias			       -

       -enable-tbaa				       -

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

       -expensive-combines				-   Enable   expensive
	      instruction combines

       -fatal-warnings					-  Treat  warnings  as
	      errors

       -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

       -filter-print-funcs=<function names>	       -  Only	print  IR  for
	      functions	     whose     name	match	  this	   for	   all
	      print-[before|after][-all] options

       -g					       - Generate dwarf debug‐
	      ging info for assembly source files

       -gpsize=<uint>					  -   Global   Pointer
       Addressing Size.
	      The default size is 8.

       -hash-based-counter-split		       - Rename counter	 vari‐
	      able of a comdat function based on cfg hash

       -ignore-empty-index-file			       - Ignore an empty index
	      file and perform non-ThinLTO compilation

       -imp-null-check-page-size=<int>		       - The page size of  the
	      target in bytes

       -imp-null-max-insts-to-consider=<uint>		-  The	max  number of
	      instructions to consider hoisting loads over (the	 algorithm  is
	      quadratic over this number)

       -incremental-linker-compatible			- When used with file‐
	      type=obj, emit an object file which can be used with  an	incre‐
	      mental linker

       -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-preci‐
	      sion inline sequences for some float libcalls

       -lto-pass-remarks-output=<filename>		-  Output filename for
	      pass remarks

       -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	 file‐
	      type=obj, relax all fixups in the emitted object file

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

       -merror-missing-parenthesis			-  Error  for  missing
	      parenthesis around predicate registers

       -merror-noncontigious-register			-  Error  for register
	      names that aren't contigious

       -mfuture-regs				       - Enable future	regis‐
	      ters

       -mips-compact-branches				-  MIPS Specific: Com‐
	      pact branch policy.

       =never
	      -	  Do not use compact branches if possible.

       =optimal
	      -	  Use compact branches where appropiate (default).

       =always
	      -	  Always use compact branches if possible.

       -mips16-constant-islands			       -  Enable  mips16  con‐
	      stant islands.

       -mips16-hard-float				-  Enable  mips16 hard
	      float.

       -mno-compound				       - Disable  looking  for
	      compound instructions for Hexagon

       -mno-fixup					-  Disable  fixing  up
	      resolved relocations for Hexagon

       -mno-ldc1-sdc1				       - Expand double	preci‐
	      sion loads and stores to their single precision counterparts

       -mno-pairing					-  Disable looking for
	      duplex instructions for Hexagon

       -mwarn-missing-parenthesis			-  Warn	 for   missing
	      parenthesis around predicate registers

       -mwarn-noncontigious-register			-  Warn	 for  register
	      names that arent contigious

       -mwarn-sign-mismatch			       - Warn for  mismatching
	      a signed and unsigned value

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

       -no-deprecated-warn			       - Suppress  all	depre‐
	      cated warnings

       -no-discriminators			       - Disable generation of
	      discriminator information.

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

       -no-warn					       - Suppress all warnings

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

       -o=<filename>				       - Output filename

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

       -pie-copy-relocations			       - PIE Copy Relocations

       -position-independent			       - Position independent

       -preserve-comments				- Preserve Comments in
	      outputted assembly

       -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

       -r600-ir-structurize			       - Use StructurizeCFG IR
	      pass

       -rdf-dump				       -

       -rdf-limit=<uint>			       -

       -regalloc				       - Register allocator to
	      use

       =default
	      -	  pick register allocator based on -O option

       =pbqp  -	  PBQP register allocator

       =greedy
	      -	  greedy register allocator

       =fast  -	  fast register allocator

       =basic -	  basic register allocator

       -relax-relocations				-  Emit	 R_X86_64_GOT‐
	      PCRELX instead of R_X86_64_GOTPCREL

       -rewrite-map-file=<filename>		       - Symbol Rewrite Map

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

       -sample-profile-check-record-coverage=<N>	-  Emit	 a  warning if
	      less than N% of records in the input profile are matched to  the
	      IR.

       -sample-profile-check-sample-coverage=<N>	-  Emit	 a  warning if
	      less than N% of samples in the input profile are matched to  the
	      IR.

       -sample-profile-inline-hot-threshold=<N>		 -  Inlined  functions
	      that account for more than N% of all samples  collected  in  the
	      parent function, will be inlined again.

       -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 tempo‐
	      rary labels

       -show-encoding					-   Show   instruction
	      encodings

       -show-inst					  -    Show   internal
	      instruction representation

       -show-inst-operands			       - Show instructions op‐
	      erands as parsed

       -stackmap-version=<int>				- Specify the stackmap
	      encoding version (default = 2)

       -static-func-full-module-prefix		       - Use full module build
	      paths in the profile counter names for static functions.

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

       -stats-json				       - Display statistics as
	      json data

       -summary-file=<string>				-  The summary file to
	      use for function importing.

       -threads=<int>				       -

       -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-loop-lcssa				-  Verify  loop	 lcssa
	      form (time consuming)

       -verify-machine-dom-info				- Verify machine domi‐
	      nator info (time consuming)

       -verify-regalloc				       - Verify during	regis‐
	      ter allocation

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

       -verify-scev				       -  Verify  ScalarEvolu‐
	      tion's backedge taken counts (slow)

       -verify-scev-maps				-  Verify  no dangling
	      value in ScalarEvolution's ExprValueMap (slow)

       -vp-counters-per-site=<number>		       - The average number of
	      profile counters allocated per value profiling site.

       -vp-static-alloc					-  Do  static  counter
	      allocation for value profiler

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

       =att   -	  Emit AT&T-style assembly

       =intel -	  Emit Intel-style assembly

       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

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.

llvm-mc 4.0			 October 2017			    LLVM-MC(1)
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