LLVM (http://llvm.org/): LLVM version 4.0.0 Optimized build. Default target: x86_64-pc-linux-gnu Host CPU: ivybridge Registered Targets: aarch64 - AArch64 (little endian) aarch64_be - AArch64 (big endian) amdgcn - AMD GCN GPUs arm - ARM arm64 - ARM64 (little endian) armeb - ARM (big endian) bpf - BPF (host endian) bpfeb - BPF (big endian) bpfel - BPF (little endian) hexagon - Hexagon lanai - Lanai mips - Mips mips64 - Mips64 [experimental] mips64el - Mips64el [experimental] mipsel - Mipsel msp430 - MSP430 [experimental] nvptx - NVIDIA PTX 32-bit nvptx64 - NVIDIA PTX 64-bit ppc32 - PowerPC 32 ppc64 - PowerPC 64 ppc64le - PowerPC 64 LE r600 - AMD GPUs HD2XXX-HD6XXX riscv32 - 32-bit RISC-V riscv64 - 64-bit RISC-V sparc - Sparc sparcel - Sparc LE sparcv9 - Sparc V9 systemz - SystemZ thumb - Thumb thumbeb - Thumb (big endian) x86 - 32-bit X86: Pentium-Pro and above x86-64 - 64-bit X86: EM64T and AMD64 xcore - XCore

OVERVIEW: llvm system compiler USAGE: llc-4.0 [options] <input bitcode> OPTIONS: General options: -I=<string> - include search path -O=<char> - Optimization level. [-O0, -O1, -O2, or -O3] (default = '-O2') -aarch64-neon-syntax - Choose style of NEON code to emit from AArch64 backend: =generic - Emit generic NEON assembly =apple - Emit Apple-style NEON assembly -amdgpu-dump-rtmd - Dump AMDGPU runtime metadata -amdgpu-spill-sgpr-to-smem - Use scalar stores to spill SGPRs if supported by subtarget -amdgpu-vgpr-index-mode - Use GPR indexing mode instead of movrel for vector indexing -arm-execute-only - -arm-implicit-it - 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-instrumentation - Instrumentation of inline assembly and assembly source files =none - no instrumentation at all =address - instrument instructions with memory arguments -asm-show-inst - Emit internal instruction representation to assembly file -asm-verbose - Add comments to directives. -bounds-checking-single-trap - Use one trap block per function -code-model - Choose code model =default - Target default code model =small - Small code model =kernel - Kernel code model =medium - Medium code model =large - Large code model -color - use colored syntax highlighting (default=autodetect) -data-sections - Emit data into separate sections -debugger-tune - Tune debug info for a particular debugger =gdb - gdb =lldb - lldb =sce - SCE targets (e.g. PS4) -denormal-fp-math - Select which denormal numbers the code is permitted to require =ieee - IEEE 754 denormal numbers =preserve-sign - the sign of a flushed-to-zero number is preserved in the sign of 0 =positive-zero - denormals are flushed to positive zero -disable-fp-elim - Disable frame pointer elimination optimization -disable-simplify-libcalls - Disable simplify-libcalls -disable-spill-fusing - Disable fusing of spill code into instructions -disable-tail-calls - Never emit tail calls -dwarf-version=<int> - Dwarf version -emulated-tls - Use emulated TLS model -enable-fp-mad - Enable less precise MAD instructions to be generated -enable-implicit-null-checks - Fold null checks into faulting memory operations -enable-load-pre - -enable-name-compression - Enable name 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-trapping-fp-math - Enable setting the FP exceptions build attribute not to use exceptions -enable-objc-arc-opts - enable/disable all ARC Optimizations -enable-scoped-noalias - -enable-tbaa - -enable-unsafe-fp-math - Enable optimizations that may decrease FP precision -exception-model - exception model =default - default exception handling model =dwarf - DWARF-like CFI based exception handling =sjlj - SjLj exception handling =arm - ARM EHABI exceptions =wineh - Windows exception model -exhaustive-register-search - Exhaustive Search for registers bypassing the depth and interference cutoffs of last chance recoloring -expensive-combines - Enable expensive instruction combines -fatal-warnings - Treat warnings as errors -filetype - Choose a file type (not all types are supported by all targets): =asm - Emit an assembly ('.s') file =obj - Emit a native object ('.o') file =null - Emit nothing, for performance testing -filter-print-funcs=<function names> - Only print IR for functions whose name match this for all print-[before|after][-all] options -float-abi - Choose float ABI type =default - Target default float ABI type =soft - Soft float ABI (implied by -soft-float) =hard - Hard float ABI (uses FP registers) -fp-contract - Enable aggressive formation of fused FP ops =fast - Fuse FP ops whenever profitable =on - Only fuse 'blessed' FP ops. =off - Only fuse FP ops when the result won't be affected. -function-sections - Emit functions into separate sections -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 -ignore-empty-index-file - Ignore an empty index file and perform non-ThinLTO compilation -imp-null-check-page-size=<int> - The page size of the target in bytes -imp-null-max-insts-to-consider=<uint> - The max number of instructions to consider hoisting loads over (the algorithm is quadratic over this number) -incremental-linker-compatible - When used with filetype=obj, emit an object file which can be used with an incremental linker -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 -join-liveintervals - Coalesce copies (default=true) -limit-float-precision=<uint> - Generate low-precision inline sequences for some float libcalls -load=<pluginfilename> - Load the specified plugin -lto-pass-remarks-output=<filename> - Output filename for pass remarks -march=<string> - Architecture to generate code for (see --version) -mattr=<a1,+a2,-a3,...> - Target specific attributes (-mattr=help for details) -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) -meabi - Set EABI type (default depends on triple): =default - Triple default EABI version =4 - EABI version 4 =5 - EABI version 5 =gnu - EABI GNU -merror-missing-parenthesis - Error for missing parenthesis around predicate registers -merror-noncontigious-register - Error for register names that aren't contigious -mfuture-regs - Enable future registers -mips-compact-branches - 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 -mtriple=<string> - Override target triple for module -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-warn - Suppress all warnings -nozero-initialized-in-bss - Don't place zero-initialized symbols into bss section -nvptx-sched4reg - NVPTX Specific: schedule for register pressue -o=<filename> - Output filename -pie-copy-relocations - PIE Copy Relocations -print-after-all - Print IR after each pass -print-before-all - Print IR before each pass -print-machineinstrs=<pass-name> - Print machine instrs -r600-ir-structurize - Use StructurizeCFG IR pass -rdf-dump - -rdf-limit=<uint> - -regalloc - Register allocator to use =default - pick register allocator based on -O option =pbqp - PBQP register allocator =greedy - greedy register allocator =fast - fast register allocator =basic - basic register allocator -relax-elf-relocations - Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF -relocation-model - Choose relocation model =static - Non-relocatable code =pic - Fully relocatable, position independent code =dynamic-no-pic - Relocatable external references, non-relocatable code =ropi - Code and read-only data relocatable, accessed PC-relative =rwpi - Read-write data relocatable, accessed relative to static base =ropi-rwpi - Combination of ropi and rwpi -rewrite-map-file=<filename> - Symbol Rewrite Map -rng-seed=<seed> - Seed for the random number generator -run-pass=<pass-name> - Run compiler only for specified passes (comma separated list) -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-inline-hot-threshold=<N> - Inlined functions that account for more than N% of all samples collected in the parent function, will be inlined again. -sample-profile-max-propagate-iterations=<uint> - Maximum number of iterations to go through when propagating sample block/edge weights through the CFG. -stack-alignment=<uint> - Override default stack alignment -stack-symbol-ordering - Order local stack symbols. -stackmap-version=<int> - Specify the stackmap encoding version (default = 2) -stackrealign - Force align the stack to the minimum alignment -start-after=<pass-name> - Resume compilation after a specific pass -start-before=<pass-name> - Resume compilation before a specific pass -static-func-full-module-prefix - Use full module build paths in the profile counter names for static functions. -stats - Enable statistics output from program (available with Asserts) -stats-json - Display statistics as json data -stop-after=<pass-name> - Stop compilation after a specific pass -stop-before=<pass-name> - Stop compilation before a specific pass -summary-file=<string> - The summary file to use for function importing. -tailcallopt - Turn fastcc calls into tail calls by (potentially) changing ABI. -thread-model - Choose threading model =posix - POSIX thread model =single - Single thread model -threads=<int> - -time-passes - Time each pass, printing elapsed time for each on exit -unique-section-names - Give unique names to every section -use-ctors - Use .ctors instead of .init_array. -verify-debug-info - -verify-dom-info - Verify dominator info (time consuming) -verify-loop-info - Verify loop info (time consuming) -verify-loop-lcssa - Verify loop lcssa form (time consuming) -verify-machine-dom-info - Verify machine dominator info (time consuming) -verify-regalloc - Verify during register allocation -verify-region-info - Verify region info (time consuming) -verify-scev - Verify ScalarEvolution's backedge taken counts (slow) -verify-scev-maps - Verify no dangling value in ScalarEvolution's ExprValueMap (slow) -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 -x86-asm-syntax - Choose style of code to emit from X86 backend: =att - Emit AT&T-style assembly =intel - Emit Intel-style assembly 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