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sancov - manual page for sancov 14

OVERVIEW: Sanitizer Coverage Processing Tool (sancov)

This tool can extract various coverage-related information from: coverage-instrumented binary files, raw .sancov files and their symbolized .symcov version. Depending on chosen action the tool expects different input files:

-print-coverage-pcs - coverage-instrumented binary files

-print-coverage - .sancov files

<other actions>
- .sancov files & corresponding binary files, .symcov files

USAGE: sancov [options] <action> <binary files...> <.sancov files...> <.symcov files...>

OPTIONS:

Color Options:

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

General options:

--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-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

=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

for promoted counters only

--atomic-first-counter - Use atomic fetch add for first counter in a function (usually the entry counter)

--blacklist=<string> - Blacklist file (sanitizer blacklist format).

--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 -

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

=throughput
- Reciprocal throughput
=latency
- Instruction latency
=code-size
- Code size
=size-latency
- Code size and latency
Action (required)

--print - Print coverage addresses

--print-coverage-pcs - Print coverage instrumentation points addresses.

--covered-functions - Print all covered funcions.

--not-covered-functions - Print all not covered funcions.

--print-coverage-stats - Print coverage statistics.

--html-report - REMOVED. Use -symbolize & coverage-report-server.py.

--symbolize - Produces a symbolized JSON report from binary report.

--merge - Merges reports.

--debug-info-correlate - Use debug info to correlate profiles.

--debugify-level=<value> - Kind of debug info to add

=locations
- Locations only
=location+variables
- Locations and Variables

--debugify-quiet - Suppress verbose debugify output

--demangle - Print demangled function name.

--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

--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-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 -

--experimental-debug-variable-locations - Use experimental new value-tracking variable locations

--fatal-warnings - Treat warnings as errors

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.

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

--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

=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

--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

--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

--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

--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> -

--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-dead-files - Do not list dead source files in reports.

--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.

--strip_path_prefix=<string> - Strip this prefix from file paths in reports.

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

--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> -

--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

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

=bb
- One statement per basic block
=scalar-indep
- Scalar independence heuristic
=store
- Store-level granularity

--polly-target=<value> - The hardware to target

=cpu
- generate CPU code

--polly-tiling - Enable loop tiling

--polly-vectorizer=<value> - Select the vectorization strategy

=none
- No Vectorization
=polly
- Polly internal vectorizer
=stripmine
- Strip-mine outer loops for the loop-vectorizer to trigger
February 2023 sancov 14