clang-repl - manual page for clang-repl 14
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:
- Emit generic NEON assembly
- 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
--addrsig - Emit an address-significance table
--align-loops=<uint> - Default alignment for loops
--allow-ginsert-as-artifact - Allow G_INSERT to be considered an artifact. Hack around AMDGPU test infinite loops.
--amdgpu-bypass-slow-div - Skip 64-bit divide for dynamic 32-bit values
--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-flat-scratch - Use flat scratch instructions
--amdgpu-enable-merge-m0 - Merge and hoist M0 initializations
--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
- Accept in both ISAs, emit implicit ITs in Thumb
- Warn in ARM, reject in Thumb
- Accept in ARM, reject in Thumb
- Warn in ARM, emit implicit ITs in Thumb
--asm-show-inst - Emit internal instruction representation to assembly file
for promoted counters only
--atomic-first-counter - Use atomic fetch add for first counter in a function (usually the entry counter)
--basic-block-sections=<all | <function list (file)> | labels | none> - Emit basic blocks into separate sections
--bounds-checking-single-trap - Use one trap block per function
--cfg-hide-cold-paths=<number> - Hide blocks with relative frequency below the given value
--cfg-hide-deoptimize-paths -
--cfg-hide-unreachable-paths -
--code-model=<value> - Choose code model
- Tiny code model
- Small code model
- Kernel code model
- Medium code model
- Large code model
--cost-kind=<value> - Target cost kind
- Reciprocal throughput
- Instruction latency
- Code size
- Code size and latency
--data-sections - Emit data into separate sections
--debug-entry-values - Enable debug info for the debug entry values.
--debug-info-correlate - Use debug info to correlate profiles.
--debugger-tune=<value> - Tune debug info for a particular debugger
- gdb
- lldb
- dbx
- SCE targets (e.g. PS4)
--debugify-level=<value> - Kind of debug info to add
- Locations only
- Locations and Variables
--debugify-quiet - Suppress verbose debugify output
--denormal-fp-math=<value> - Select which denormal numbers the code is permitted to require
- IEEE 754 denormal numbers
- the sign of a flushed-to-zero number is preserved in the sign of 0
- denormals are flushed to positive zero
--denormal-fp-math-f32=<value> - Select which denormal numbers the code is permitted to require for float
- IEEE 754 denormal numbers
- the sign of a flushed-to-zero number is preserved in the sign of 0
- denormals are flushed to positive zero
--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
--disable-tail-calls - Never emit tail calls
--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-call-site-info - Emit call site debug information, if debug information is enabled.
--emscripten-cxx-exceptions-allowed=<string> - The list of function names in which Emscripten-style exception handling is enabled (see emscripten EMSCRIPTEN_CATCHING_ALLOWED options)
--emulated-tls - Use emulated TLS model
--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-load-in-loop-pre -
--enable-load-pre -
--enable-loop-simplifycfg-term-folding -
--enable-name-compression - Enable name/filename string compression
--enable-no-infs-fp-math - Enable FP math optimizations that assume no +-Infs
--enable-no-nans-fp-math - Enable FP math optimizations that assume no NaNs
--enable-no-signed-zeros-fp-math - Enable FP math optimizations that assume the sign of 0 is insignificant
--enable-no-trapping-fp-math - Enable setting the FP exceptions build attribute not to use exceptions
--enable-split-backedge-in-load-pre -
--enable-unsafe-fp-math - Enable optimizations that may decrease FP precision
--exception-model=<value> - exception model
- default exception handling model
- DWARF-like CFI based exception handling
- SjLj exception handling
- ARM EHABI exceptions
- Windows exception model
- WebAssembly exception handling
--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.
--experimental-debug-variable-locations - Use experimental new value-tracking variable locations
--fatal-warnings - Treat warnings as errors
--filetype=<value> - Choose a file type (not all types are supported by all targets):
- Emit an assembly ('.s') file
- Emit a native object ('.o') file
- Emit nothing, for performance testing
--filter=<string> - Only process files that match this filter. This flag only applies to all-TUs.
--float-abi=<value> - Choose float ABI type
- Target default float ABI type
- Soft float ABI (implied by -soft-float)
- Hard float ABI (uses FP registers)
--force-dwarf-frame-section - Always emit a debug frame section.
--fp-contract=<value> - Enable aggressive formation of fused FP ops
- Fuse FP ops whenever profitable
- Only fuse 'blessed' FP ops.
- Only fuse FP ops when the result won't be affected.
--frame-pointer=<value> - Specify frame pointer elimination optimization
- Disable frame pointer elimination
- Disable frame pointer elimination for non-leaf frame
- Enable frame pointer elimination
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).
--function-sections - Emit functions into separate sections
--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.
The default size is 8.
--hash-based-counter-split - Rename counter variable of a comdat function based on cfg hash
--hot-cold-split - Enable hot-cold splitting pass
--ignore-xcoff-visibility - Not emit the visibility attribute for asm in AIX OS or give all symbols 'unspecified' visibility in XCOFF object file
--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-iterations=<uint> - Limit the maximum number of instruction combining iterations
--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
--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.
--lto-embed-bitcode=<value> - Embed LLVM bitcode in object files produced by LTO
- Do not embed
- Embed after all optimization passes
- 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
--march=<string> - Architecture to generate code for (see --version)
--matrix-default-layout=<value> - Sets the default matrix layout
- Use column-major layout
- Use row-major layout
--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
--mcabac - tbd
--mcpu=<cpu-name> - Target a specific cpu type (-mcpu=help for details)
--meabi=<value> - Set EABI type (default depends on triple):
- Triple default EABI version
- EABI version 4
- EABI version 5
- EABI GNU
--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
- Build for HVX v60
- Build for HVX v62
- Build for HVX v65
- Build for HVX v66
- Build for HVX v67
- Build for HVX v68
- Build for HVX v69
--mips-compact-branches=<value> - MIPS Specific: Compact branch policy.
- Do not use compact branches if possible.
- Use compact branches where appropriate (default).
- 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
--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
--no-xray-index - Don't emit xray_fn_idx section
--nozero-initialized-in-bss - Don't place zero-initialized symbols into bss section
--nvptx-sched4reg - NVPTX Specific: schedule for register pressue
--opaque-pointers - Use opaque pointers
--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).
--r600-ir-structurize - Use StructurizeCFG IR pass
--rdf-dump -
--rdf-limit=<uint> -
--relax-elf-relocations - Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF
--relocation-model=<value> - Choose relocation model
- Non-relocatable code
- Fully relocatable, position independent code
- Relocatable external references, non-relocatable code
- Code and read-only data relocatable, accessed PC-relative
- Read-write data relocatable, accessed relative to static base
- Combination of ropi and rwpi
--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.
--skip-ret-exit-block - Suppress counter promotion if exit blocks contain ret.
speculative counter promotion
update can be further/iteratively promoted into an acyclic region.
--split-machine-functions - Split out cold basic blocks from machine functions based on profile information
--stack-size-section - Emit a section containing stack size metadata
--stack-symbol-ordering - Order local stack symbols.
--stackrealign - Force align the stack to the minimum alignment
--strict-dwarf - use strict dwarf
--summary-file=<string> - The summary file to use for function importing.
--swift-async-fp=<value> - Determine when the Swift async frame pointer should be set
- Determine based on deployment target
- Always set the bit
- Never set the bit
--tail-predication=<value> - MVE tail-predication pass options
- Don't tail-predicate loops
- Enable tail-predication, but not for reduction loops
- Enable tail-predication, including reduction loops
- Enable tail-predication, but not for reduction loops, and force this which might be unsafe
- Enable tail-predication, including reduction loops, and force this which might be unsafe
--tailcallopt - Turn fastcc calls into tail calls by (potentially) changing ABI.
--thinlto-assume-merged - Assume the input has already undergone ThinLTO function importing and the other pre-optimization pipeline changes.
--thread-model=<value> - Choose threading model
- POSIX thread model
- Single thread model
--threads=<int> -
--tls-size=<uint> - Bit size of immediate TLS offsets
--unique-basic-block-section-names - Give unique names to every basic block section
--unique-section-names - Give unique names to every section
--use-ctors - Use .ctors instead of .init_array.
--vec-extabi - Enable the AIX Extended Altivec ABI.
--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
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.
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
--xcoff-traceback-table - Emit the XCOFF traceback table
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-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
- One statement per basic block
- Scalar independence heuristic
- Store-level granularity
--polly-target=<value> - The hardware to target
- generate CPU code
--polly-tiling - Enable loop tiling
--polly-vectorizer=<value> - Select the vectorization strategy
- No Vectorization
- Polly internal vectorizer
- Strip-mine outer loops for the loop-vectorizer to trigger