Provided by: clang-tools-20_20.1.2-0ubuntu1_amd64 
NAME
modularize - manual page for modularize 20
DESCRIPTION
OVERVIEW: modularize.
USAGE: modularize [options] <list of one or more header list files> <arguments to be passed to front
end>...
OPTIONS:
Color Options:
--color - Use colors in output (default=autodetect)
General options:
-I <path> - Include path for coverage check.
--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
--aarch64-use-aa - Enable the use of AA during codegen.
--abort-on-max-devirt-iterations-reached - Abort when the max iterations for
devirtualization CGSCC repeat pass is reached
--allow-ginsert-as-artifact - Allow G_INSERT to be considered an artifact.
Hack around AMDGPU test infinite loops.
--amdgpu-atomic-optimizer-strategy=<value> - Select DPP or Iterative strategy for scan
=DPP - Use DPP operations for scan
=Iterative
- Use Iterative approach for scan
=None - Disable atomic optimizer
--amdgpu-bypass-slow-div - Skip 64-bit divide for dynamic 32-bit values
--amdgpu-disable-loop-alignment - Do not align and prefetch loops
--amdgpu-dpp-combine - Enable DPP combiner
--amdgpu-dump-hsa-metadata - Dump AMDGPU HSA Metadata
--amdgpu-enable-merge-m0 - Merge and hoist M0 initializations
--amdgpu-indirect-call-specialization-threshold=<uint> - A threshold controls whether an indirect
call will be specialized
--amdgpu-kernarg-preload-count=<uint> - How many kernel arguments to preload onto
SGPRs
--amdgpu-module-splitting-max-depth=<uint> - maximum search depth. 0 forces a greedy
approach. warning: the algorithm is up to O(2^N), where N is the max depth.
--amdgpu-promote-alloca-to-vector-limit=<uint> - Maximum byte size to consider promote alloca
to vector
--amdgpu-sdwa-peephole - Enable SDWA peepholer
--amdgpu-use-aa-in-codegen - Enable the use of AA during codegen.
--amdgpu-verify-hsa-metadata - Verify AMDGPU HSA Metadata
--amdgpu-vgpr-index-mode - Use GPR indexing mode instead of movrel for
vector indexing
--argext-abi-check - Verify that narrow int args are properly
extended per the SystemZ ABI.
--arm-add-build-attributes -
--arm-implicit-it=<value> - Allow conditional instructions outside 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
--atomic-first-counter - Use atomic fetch add for first counter in a
function (usually the entry counter)
--block-check-header-list-only - Only warn if #include directives are inside
extern or namespace blocks if the included header is in the header list.
--bounds-checking-single-trap - Use one trap block per function
--bpf-stack-size=<int> - Specify the BPF stack size limit
--cfg-hide-cold-paths=<number> - Hide blocks with relative frequency below
the given value
--cfg-hide-deoptimize-paths -
--cfg-hide-unreachable-paths -
--check-functions-filter=<regex> - Only emit checks for arguments of functions
whose names match the given regular expression
--conditional-counter-update - Do conditional counter updates in single
byte counters mode)
--cost-kind=<value> - Target cost kind
=throughput
- Reciprocal throughput
=latency
- Instruction latency
=code-size
- Code size
=size-latency
- Code size and latency
--coverage-check-only - Only do the coverage check.
--crel - Use CREL relocation format for ELF
--cs-profile-generate - Perform context sensitive PGO
instrumentation
--cs-profile-path=<string> - Context sensitive profile file path
--debug-info-correlate - Use debug info to correlate profiles.
(Deprecated, use -profile-correlate=debug-info)
--debugify-func-limit=<ulong> - Set max number of processed functions per
pass.
--debugify-level=<value> - Kind of debug info to add
=locations
- Locations only
=location+variables
- Locations and Variables
--debugify-quiet - Suppress verbose debugify output
--disable-auto-upgrade-debug-info - Disable autoupgrade of debug info
--disable-i2p-p2i-opt - Disables inttoptr/ptrtoint roundtrip
optimization
--disable-promote-alloca-to-lds - Disable promote alloca to LDS
--disable-promote-alloca-to-vector - Disable promote alloca to vector
--display-file-lists - Display lists of good files (no compile
errors), problem files, and a combined list with problem files preceded by a '#'.
--do-counter-promotion - Do counter register promotion
--dot-cfg-mssa=<file name for generated dot file> - file name for generated dot file
--dwarf-version=<int> - Dwarf version
--dwarf64 - Generate debugging info in the 64-bit DWARF
format
--emit-compact-unwind-non-canonical - Whether to try to emit Compact Unwind for
non canonical entries.
--emit-dwarf-unwind=<value> - Whether to emit DWARF EH frame entries.
=always
- Always emit EH frame entries
=no-compact-unwind
- Only emit EH frame entries when compact unwind is not available
=default
- Use target platform default
--emscripten-cxx-exceptions-allowed=<string> - The list of function names in which
Emscripten-style exception handling is enabled (see emscripten EMSCRIPTEN_CATCHING_ALLOWED
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-hoist - Enable the GVN hoisting pass (default = off)
--enable-gvn-memdep -
--enable-gvn-memoryssa -
--enable-gvn-sink - Enable the GVN sinking pass (default = off)
--enable-jump-table-to-switch - Enable JumpTableToSwitch pass (default =
off)
--enable-load-in-loop-pre -
--enable-load-pre -
--enable-loop-simplifycfg-term-folding -
--enable-name-compression - Enable name/filename string compression
--enable-split-backedge-in-load-pre -
--enable-split-loopiv-heuristic - Enable loop iv regalloc heuristic
--enable-vtable-profile-use - If ThinLTO and WPD is enabled and this
option is true, vtable profiles will be used by ICP pass for more efficient indirect call
sequence. If false, type profiles won't be used.
--enable-vtable-value-profiling - If true, the virtual table address will be
instrumented to know the types of a C++ pointer. The information is used in indirect call
promotion to do selective vtable-based comparison.
--execute-concurrency=<uint> - The number of threads used to process all
files in parallel. Set to 0 for hardware concurrency. This flag only applies to all-TUs.
--executor=<string> - The name of the executor to use.
--expand-variadics-override=<value> - Override the behaviour of expand-variadics
=unspecified
- Use the implementation defaults
=disable
- Disable the pass entirely
=optimize
- Optimise without changing ABI
=lowering
- Change variadic calling convention
--experimental-debug-variable-locations - Use experimental new value-tracking variable
locations
--experimental-debuginfo-iterators - Enable communicating debuginfo positions
through iterators, eliminating intrinsics. Has no effect if
--preserve-input-debuginfo-format=true.
--fatal-warnings - Treat warnings as errors
--fdpic - Use the FDPIC ABI
--filter=<string> - Only process files that match this filter.
This flag only applies to all-TUs.
--force-tail-folding-style=<value> - Force the tail folding style
=none - Disable tail folding
=data - Create lane mask for data only, using active.lane.mask intrinsic
=data-without-lane-mask
- Create lane mask with compare/stepvector
=data-and-control
- Create lane mask using active.lane.mask intrinsic, and use it for both data and control flow
=data-and-control-without-rt-check
- Similar to data-and-control, but remove the runtime check
=data-with-evl
- Use predicated EVL instructions for tail folding. If EVL is unsupported, fallback to
data-without-lane-mask.
--fs-profile-debug-bw-threshold=<uint> - Only show debug message if the source branch
weight is greater
than this value.
--fs-profile-debug-prob-diff-threshold=<uint> - Only show debug message if the branch
probability is greater than this value (in percentage).
--generate-merged-base-profiles - When generating nested context-sensitive
profiles, always generate extra base profile for function with all its context profiles merged
into it.
--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
--hexagon-add-build-attributes -
--hexagon-rdf-limit=<uint> -
--hot-cold-split - Enable hot-cold splitting pass
--hwasan-percentile-cutoff-hot=<int> - Hot percentile cutoff.
--hwasan-random-rate=<number> - Probability value in the range [0.0, 1.0] to
keep instrumentation of a function.
--implicit-mapsyms - Allow mapping symbol at section beginning to
be implicit, lowering number of mapping symbols at the expense of some portability. Recommended
for projects that can build all their object files using this option
--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-max-sink-users=<uint> - Maximum number of undroppable users for
instruction sinking
--instcombine-maxarray-size=<uint> - Maximum array size considered when doing a
combine
--instcombine-negator-enabled - Should we attempt to sink negations?
--instcombine-negator-max-depth=<uint> - What is the maximal lookup depth when trying
to check for viability of negation sinking.
--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.
--lint-abort-on-error - In the Lint pass, abort on errors.
--loongarch-use-aa - Enable the use of AA during codegen.
--lower-allow-check-percentile-cutoff-hot=<int> - Hot percentile cutoff.
--lower-allow-check-random-rate=<number> - Probability value in the range [0.0, 1.0] of
unconditional pseudo-random checks.
--lto-aix-system-assembler=<path> - Path to a system assembler, picked up on AIX
only
--lto-embed-bitcode=<value> - Embed LLVM bitcode in object files produced
by LTO
=none - Do not embed
=optimized
- Embed after all optimization passes
=post-merge-pre-opt
- Embed post merge, but before optimizations
--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
--matrix-default-layout=<value> - Sets the default matrix layout
=column-major
- Use column-major layout
=row-major
- Use row-major layout
--matrix-print-after-transpose-opt -
--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
--mcabac - tbd
--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
=v67 - Build for HVX v67
=v68 - Build for HVX v68
=v69 - Build for HVX v69
=v71 - Build for HVX v71
=v73 - Build for HVX v73
=v75 - Build for HVX v75
=v79 - Build for HVX v79
--mips-compact-branches=<value> - MIPS Specific: Compact branch policy.
=never
- Do not use compact branches if possible.
=optimal
- Use compact branches where appropriate (default).
=always
- Always use compact branches if possible.
--mips16-constant-islands - Enable mips16 constant islands.
--mips16-hard-float - Enable mips16 hard float.
--mir-strip-debugify-only - Should mir-strip-debug only strip debug info
from debugified modules by default
--misexpect-tolerance=<uint> - Prevents emitting diagnostics when profile
counts are within N% of the threshold..
--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
--module-map-path=<string> - Turn on module map output and specify output
path or file name. If no path is specified and if prefix option is specified, use prefix for file
path.
--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
--no-coverage-check - Don't do the coverage check.
--no-deprecated-warn - Suppress all deprecated warnings
--no-discriminators - Disable generation of discriminator
information.
--no-type-check - Suppress type errors (Wasm)
--no-warn - Suppress all warnings
--nvptx-approx-log2f32 - NVPTX Specific: whether to use lg2.approx
for log2
--nvptx-sched4reg - NVPTX Specific: schedule for register
pressue
--object-size-offset-visitor-max-visit-instructions=<uint> - Maximum number of instructions for
ObjectSizeOffsetVisitor to look at
--pgo-block-coverage - Use this option to enable basic block
coverage instrumentation
--pgo-temporal-instrumentation - Use this option to enable temporal
instrumentation
--pgo-view-block-coverage-graph - Create a dot file of CFGs with block
coverage inference information
--prefix=<string> - Prepend header file paths with this prefix.
If not specified, the files are considered to be relative to the header list file.
--print-pipeline-passes - Print a '-passes' compatible string
describing the pipeline (best-effort only).
--problem-files-list=<string> - List of files with compilation or
modularization problems for assistant mode.
This will be excluded.
--profile-correlate=<value> - Use debug info or binary file to correlate
profiles.
=<empty>
- No profile correlation
=debug-info
- Use debug info to correlate
=binary
- Use binary to correlate
--promote-alloca-vector-loop-user-weight=<uint> - The bonus weight of users of allocas within
loop when sorting profitable allocas
--r600-ir-structurize - Use StructurizeCFG IR pass
--riscv-add-build-attributes -
--riscv-use-aa - Enable the use of AA during codegen.
--root-module=<string> - Specify the name of the root module.
--runtime-counter-relocation - Enable relocating counters at runtime.
--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.
--sampled-instr-burst-duration=<uint> - Set the profile instrumentation burst
duration, which can range from 1 to the value of 'sampled-instr-period' (0 is invalid). This
number of samples will be recorded for each 'sampled-instr-period' count update. Setting to 1
enables simple sampling, in which case it is recommended to set 'sampled-instr-period' to a prime
number.
--sampled-instr-period=<uint> - Set the profile instrumentation sample
period. A sample period of 0 is invalid. For each sample period, a fixed number of consecutive
samples will be recorded. The number is controlled by 'sampled-instr-burst-duration' flag. The
default sample period of 65536 is optimized for generating efficient code that leverages unsigned
short integer wrapping in overflow, but this is disabled under simple sampling (burst duration =
1).
--sampled-instrumentation - Do PGO instrumentation sampling
--sanitizer-early-opt-ep - Insert sanitizers on OptimizerEarlyEP.
--save-temp-labels - Don't discard temporary labels
--skip-ret-exit-block - Suppress counter promotion if exit blocks
contain ret.
--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.
--spirv-ext=<value> - Specify list of enabled SPIR-V extensions
--spv-dump-deps - Dump MIR with SPIR-V dependencies info
--spv-emit-nonsemantic-debug-info - Emit SPIR-V NonSemantic.Shader.DebugInfo.100
instructions
--summary-file=<string> - The summary file to use for function
importing.
--sve-tail-folding=<string> - Control the use of vectorisation using
tail-folding for SVE where the option is specified in the form (Initial)[+(Flag1|Flag2|...)]:
disabled (Initial) No loop types will vectorize using tail-folding default (Initial)
Uses the default tail-folding settings for the target CPU all (Initial) All legal loop
types will vectorize using tail-folding simple (Initial) Use tail-folding for simple loops
(not reductions or recurrences) reductions Use tail-folding for loops containing reductions
noreductions Inverse of above recurrences Use tail-folding for loops containing fixed order
recurrences norecurrences Inverse of above reverse Use tail-folding for loops requiring
reversed predicates noreverse Inverse of above
--tail-predication=<value> - MVE tail-predication pass options
=disabled
- Don't tail-predicate loops
=enabled-no-reductions
- Enable tail-predication, but not for reduction loops
=enabled
- Enable tail-predication, including reduction loops
=force-enabled-no-reductions
- Enable tail-predication, but not for reduction loops, and force this which might be unsafe
=force-enabled
- Enable tail-predication, including reduction loops, and force this which might be unsafe
--target-abi=<string> - The name of the ABI to be targeted from the
backend.
--thinlto-assume-merged - Assume the input has already undergone
ThinLTO function importing and the other pre-optimization pipeline changes.
--threads=<int> -
--translator-compatibility-mode - SPIR-V Translator compatibility mode
--type-based-intrinsic-cost - Calculate intrinsics cost based only on
argument types
--ubsan-guard-checks - Guard UBSAN checks with
`llvm.allow.ubsan.check()`.
--use-undef - Use undef when generating programs.
--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
--wasm-enable-eh - WebAssembly exception handling
--wasm-enable-sjlj - WebAssembly setjmp/longjmp handling
--wasm-use-legacy-eh - WebAssembly exception handling (legacy)
--wholeprogramdevirt-cutoff=<uint> - Max number of devirtualizations for devirt
module pass
--write-experimental-debuginfo - Write debug info in the new non-intrinsic
format. Has no effect if --preserve-input-debuginfo-format=true.
--x86-align-branch=<string> - Specify types of branches to align (plus
separated list of types):
jcc indicates conditional jumps fused indicates fused conditional jumps jmp indicates
direct unconditional jumps call indicates direct and indirect calls ret indicates rets
indirect indicates indirect unconditional jumps
--x86-align-branch-boundary=<uint> - Control how the assembler should align
branches with NOP. If the boundary's size is not 0, it should be a power of 2 and no less than 32.
Branches will be aligned to prevent from being across or against the boundary of specified size.
The default value 0 does not align branches.
--x86-branches-within-32B-boundaries - Align selected instructions to mitigate
negative performance impact of Intel's micro code update for errata skx102.
May break assumptions about labels corresponding to particular instructions, and should be used
with caution.
--x86-pad-max-prefix-size=<uint> - Maximum number of prefixes to use for
padding
--x86-relax-relocations - Emit
GOTPCRELX/REX_GOTPCRELX/CODE_4_GOTPCRELX instead of GOTPCREL on x86-64 ELF
--x86-sse2avx - Specify that the assembler should encode SSE
instructions with VEX prefix
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
Polly Options: Configure the polly loop optimizer
--polly - Enable the polly optimizer (with -O1, -O2 or
-O3)
--polly-2nd-level-tiling - Enable a 2nd level loop of loop tiling
--polly-annotate-metadata-vectorize - Append vectorize enable/disable metadata
from polly
--polly-ast-print-accesses - Print memory access functions
--polly-context=<isl parameter set> - Provide additional constraints on the
context parameters
--polly-dce-precise-steps=<int> - The number of precise steps between two
approximating iterations. (A value of -1 schedules another approximation stage before the actual
dead code elimination.
--polly-delicm-max-ops=<int> - Maximum number of isl operations to invest
for lifetime analysis; 0=no limit
--polly-detect-full-functions - Allow the detection of full functions
--polly-dump-after - Dump module after Polly transformations into
a file suffixed with "-after"
--polly-dump-after-file=<string> - Dump module after Polly transformations to
the given file
--polly-dump-before - Dump module before Polly transformations
into a file suffixed with "-before"
--polly-dump-before-file=<string> - Dump module before Polly transformations to
the given file
--polly-enable-simplify - Simplify SCoP after optimizations
--polly-ignore-func=<string> - Ignore functions that match a regex.
Multiple regexes can be comma separated. Scop detection will ignore all functions that match ANY
of the regexes provided.
--polly-isl-arg=<argument> - Option passed to ISL
--polly-matmul-opt - Perform optimizations of matrix
multiplications based on pattern matching
--polly-on-isl-error-abort - Abort if an isl error is encountered
--polly-only-func=<string> - Only run on functions that match a regex.
Multiple regexes can be comma separated. Scop detection will run on all functions that match ANY
of the regexes provided.
--polly-only-region=<identifier> - Only run on certain regions (The provided
identifier must appear in the name of the region's entry block
--polly-only-scop-detection - Only run scop detection, but no other
optimizations
--polly-optimized-scops - Polly - Dump polyhedral description of Scops
optimized with the isl scheduling optimizer and the set of post-scheduling transformations is
applied on the schedule tree
--polly-parallel - Generate thread parallel code (isl codegen
only)
--polly-parallel-force - Force generation of thread parallel code
ignoring any cost model
--polly-pattern-matching-based-opts - Perform optimizations based on pattern
matching
--polly-postopts - Apply post-rescheduling optimizations such
as tiling (requires -polly-reschedule)
--polly-pragma-based-opts - Apply user-directed transformation from
metadata
--polly-pragma-ignore-depcheck - Skip the dependency check for pragma-based
transformations
--polly-process-unprofitable - Process scops that are unlikely to benefit
from Polly optimizations.
--polly-register-tiling - Enable register tiling
--polly-report - Print information about the activities of
Polly
--polly-reschedule - Optimize SCoPs using ISL
--polly-show - Highlight the code regions that will be
optimized in a (CFG BBs and LLVM-IR instructions)
--polly-show-only - Highlight the code regions that will be
optimized in a (CFG only BBs)
--polly-stmt-granularity=<value> - Algorithm to use for splitting basic blocks
into multiple statements
=bb - One statement per basic block
=scalar-indep
- Scalar independence heuristic
=store - Store-level granularity
--polly-tc-opt - Perform optimizations of tensor contractions
based on pattern matching
--polly-tiling - Enable loop tiling
--polly-vectorizer=<value> - Select the vectorization strategy
=none - No Vectorization
=stripmine
- Strip-mine outer loops for the loop-vectorizer to trigger
modularize 20 April 2025 MODULARIZE(1)