NAME¶

llvm-mc - manual page for llvm-mc 9

DESCRIPTION¶

OVERVIEW: llvm machine code playground

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

OPTIONS:

Color Options:

--color - Use colors in output (default=autodetect)

General options:

-I=<directory> - Directory of include files

--aarch64-neon-syntax=<value> - Choose style of NEON code to emit from AArch64 backend:

=generic

- Emit generic NEON assembly

=apple

- Emit Apple-style NEON assembly

--amdgpu-disable-loop-alignment - Do not align and prefetch loops

--amdgpu-disable-power-sched - Disable scheduling to minimize mAI power bursts

--amdgpu-dpp-combine - Enable DPP combiner

--amdgpu-dump-hsa-metadata - Dump AMDGPU HSA Metadata

--amdgpu-enable-global-sgpr-addr - Enable use of SGPR regs for GLOBAL LOAD/STORE instructions

--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-hsa-metadata - Verify AMDGPU HSA 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=<value> - 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-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

--compress-debug-sections=<value> - Choose DWARF debug sections compression:

=none

- No compression

=zlib

- Use zlib compression

=zlib-gnu

- Use zlib-gnu compression (deprecated)

--cost-kind=<value> - Target cost kind

=throughput

- Reciprocal throughput

=latency

- Instruction latency

=code-size

- Code size

--cvp-dont-add-nowrap-flags -

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

--disable-promote-alloca-to-lds - Disable promote alloca to LDS

--disable-promote-alloca-to-vector - Disable promote alloca to vector

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

--emscripten-cxx-exceptions-whitelist=<string> - The list of function names in which Emscripten-style exception handling is enabled (see emscripten EMSCRIPTEN_CATCHING_WHITELIST options)

--enable-cse-in-irtranslator - Should enable CSE in irtranslator

--enable-cse-in-legalizer - Should enable CSE in Legalizer

--enable-emscripten-cxx-exceptions - WebAssembly Emscripten-style exception handling

--enable-emscripten-sjlj - WebAssembly Emscripten-style setjmp/longjmp handling

--enable-gvn-memdep -

--enable-load-pre -

--enable-loop-simplifycfg-term-folding -

--enable-name-compression - Enable name string compression

--expensive-combines - Enable expensive instruction combines

--fatal-warnings - Treat warnings as errors

--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 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

--import-all-index - Import all external functions in index.

--incremental-linker-compatible - When used with filetype=obj, emit an object file which can be used with an incremental linker

--instcombine-code-sinking - Enable code sinking

--instcombine-guard-widening-window=<uint> - How wide an instruction window to bypass looking for another guard

--instcombine-max-num-phis=<uint> - Maximum number phis to handle in intptr/ptrint folding

--instcombine-maxarray-size=<uint> - Maximum array size considered when doing a combine

--instrprof-atomic-counter-update-all - Make all profile counter updates atomic (for testing only)

--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.

--large-code-model - Create cfi directives that assume the code might be more than 2gb away

--lto-pass-remarks-filter=<regex> - Only record optimization remarks from passes whose names match the given regular expression

--lto-pass-remarks-format=<format> - The format used for serializing remarks (default: YAML)

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

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

--masm-integers - Enable binary and hex masm integers (0b110 and 0ABCh)

--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

--mhvx - Enable Hexagon Vector eXtensions

--mhvx=<value> - Enable Hexagon Vector eXtensions

=v60

- Build for HVX v60

=v62

- Build for HVX v62

=v65

- Build for HVX v65

=v66

- Build for HVX v66

--mips-compact-branches=<value> - 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

--poison-checking-function-local - Check that returns are non-poison (for testing)

--position-independent - Position independent

--preserve-comments - Preserve Comments in outputted assembly

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

--r600-ir-structurize - Use StructurizeCFG IR pass

--rdf-dump -

--rdf-limit=<uint> -

--relax-relocations - Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL

--remarks-section - Emit a section containing remark diagnostics metadata

--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-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

--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.

--split-dwarf-file=<filename> - DWO output filename

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

--threads=<int> -

--time-trace-granularity=<uint> - Minimum time granularity (in microseconds) traced by time profiler

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

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

--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

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