Provided by: llvm-5.0_5.0-3~16.04.1_amd64 
NAME
llvm-mc - manual page for llvm-mc 5.0
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-comd - Dump AMDGPU Code Object Metadata
-amdgpu-enable-merge-m0 - Merge and hoist M0 initializations
-amdgpu-sdwa-peephole - Enable SDWA peepholer
-amdgpu-spill-sgpr-to-smem - Use scalar stores to spill SGPRs if supported by
subtarget
-amdgpu-verify-comd - Verify AMDGPU Code Object Metadata
-amdgpu-vgpr-index-mode - Use GPR indexing mode instead of movrel for vector
indexing
-arch=<string> - Target arch to assemble for, see -version for
available targets
-arm-add-build-attributes -
-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
-atomic-counter-update-promoted - Do counter update using atomic fetch add
for promoted counters only
-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 -
-debug-counter - Comma separated list of debug counter skip and count
=predicateinfo-rename
- Controls which variables are renamed with predicateinfo
=newgvn-vn
- Controls which instructions are value numbered
=newgvn-phi
- Controls which instructions we create phi of ops for
-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
-do-counter-promotion - Do counter register promotion
-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-packed-inlinable-literals - Enable packed inlinable literals (v2f16, v2i16)
-enable-scoped-noalias -
-enable-si-insert-waitcnts - Use new waitcnt insertion pass
-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 debugging info for assembly source
files
-gpsize=<uint> - Global Pointer Addressing Size.
The default size is 8.
-hash-based-counter-split - Rename counter variable of a comdat function based on
cfg hash
-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 filetype=obj, emit an object file
which can be used with an incremental linker
-instcombine-maxarray-size=<uint> - Maximum array size considered when doing a combine
-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
-iterative-counter-promotion - Allow counter promotion across the whole loop nest.
-join-liveintervals - Coalesce copies (default=true)
-limit-float-precision=<uint> - Generate low-precision 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)
-max-counter-promotions=<int> - Max number of allowed counter promotions
-max-counter-promotions-per-loop=<uint> - Max number counter promotions per loop to avoid
increasing register pressure too much
-mc-relax-all - When used with filetype=obj, relax all fixups in the
emitted object file
-mcpu=<cpu-name> - Target a specific cpu type (-mcpu=help for details)
-memop-size-large=<uint> - Set large value thresthold in memory intrinsic size
profiling. Value of 0 disables the large value profiling.
-memop-size-range=<string> - Set the range of size in memory intrinsic calls to be
profiled precisely, in a format of <start_val>:<end_val>
-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 registers
-mips-compact-branches - MIPS Specific: Compact 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 constant 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 precision 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 deprecated 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
=pbqp - PBQP register allocator
=greedy
- greedy register allocator
=fast - fast register allocator
=basic - basic register allocator
=default
- pick register allocator based on -O option
-relax-relocations - Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL
-rewrite-map-file=<filename> - Symbol Rewrite Map
-rng-seed=<seed> - Seed for the random number generator
-safepoint-ir-verifier-print-only -
-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 temporary labels
-show-encoding - Show instruction encodings
-show-inst - Show internal instruction representation
-show-inst-operands - Show instructions operands as parsed
-simplify-mir - Leave out unnecessary information when printing MIR
-speculative-counter-promotion-max-exiting=<uint> - The max number of exiting blocks of a loop to allow
speculative counter promotion
-speculative-counter-promotion-to-loop - When the option is false, if the target block is in a
loop, the promotion will be disallowed unless the promoted counter
update can be further/iteratively promoted into an acyclic region.
-stackmap-version=<int> - Specify the stackmap encoding version (default = 3)
-static-func-full-module-prefix - Use full module build paths in the profile counter
names for static functions.
-static-func-strip-dirname-prefix=<uint> - Strip specified level of directory name from source
path in the profile counter name 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
-unfold-element-atomic-memcpy-max-elements=<uint> - Maximum number of elements in atomic memcpy the
optimizer is allowed to unfold
-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 dominator 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)
-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.