Provided by: clang-tools-19_19.1.4-1ubuntu1_amd64 
NAME
clang-repl - manual page for clang-repl 19
DESCRIPTION
USAGE: clang-repl [options] [code to run]
OPTIONS:
Color Options:
--color - Use colors in output
(default=autodetect)
General options:
--Xcc=<string> - Argument to pass to the
CompilerInvocation
--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-enable-power-sched - Enable scheduling to minimize
mAI power bursts
--amdgpu-kernarg-preload-count=<uint> - How many kernel arguments to
preload onto SGPRs
--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
--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
--atomic-first-counter - Use atomic fetch add for
first counter in a function (usually the entry counter)
--bounds-checking-single-trap - Use one trap block per
function
--bounds-checking-unique-traps - Always use one trap per check
--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
--cost-kind=<value> - Target cost kind
=throughput
- Reciprocal throughput
=latency
- Instruction latency
=code-size
- Code size
=size-latency
- Code size and latency
--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
--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-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-pgo-force-function-attrs - Enable pass to set function
attributes based on PGO profiles
--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 probility 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 cuttoff.
--hwasan-random-rate=<number> - Probability value in the
range [0.0, 1.0] to keep instrumentation of a function.
--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.
--lower-allow-check-percentile-cutoff-hot=<int> - Hot percentile cuttoff.
--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
--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
--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-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-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
--poison-checking-function-local - Check that returns are
non-poison (for testing)
--print-pipeline-passes - Print a '-passes' compatible
string describing the pipeline (best-effort only).
--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.
--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 0 to one less than the value
of 'sampled-instr-period'. 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. 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 65535 is
optimized for generating efficient code that leverages unsigned integer wrapping in
overflow.
--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.
--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
--thinlto-assume-merged - Assume the input has already
undergone ThinLTO function importing and the other pre-optimization pipeline
changes.
--threads=<int> -
--type-based-intrinsic-cost - Calculate intrinsics cost
based only on argument types
--ubsan-guard-checks - Guard UBSAN checks with
`llvm.allow.ubsan.check()`.
--ubsan-unique-traps - Deoptimize traps for UBSAN so
there is 1 trap per 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-exnref - WebAssembly exception
handling (exnref)
--wasm-enable-sjlj - WebAssembly setjmp/longjmp
handling
--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
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-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