lli-3.5(1)



LLI(1)                               LLVM                               LLI(1)

NAME
       lli - directly execute programs from LLVM bitcode

SYNOPSIS
       lli [options] [filename] [program args]

DESCRIPTION
       lli directly executes programs in LLVM bitcode format.  It takes a pro-
       gram in LLVM bitcode format and executes it using a  just-in-time  com-
       piler,  if  one is available for the current architecture, or an inter-
       preter.  lli takes all of the same code generator options  as  llc|llc,
       but  they  are  only  effective when lli is using the just-in-time com-
       piler.

       If filename is not specified, then lli reads the LLVM bitcode  for  the
       program from standard input.

       The  optional args specified on the command line are passed to the pro-
       gram as arguments.

GENERAL OPTIONS
       -fake-argv0=executable
          Override the argv[0] value passed into the executing program.

       -force-interpreter={false,true}
          If set to true, use the interpreter even if a just-in-time  compiler
          is available for this architecture. Defaults to false.

       -help
          Print a summary of command line options.

       -load=pluginfilename
          Causes  lli  to load the plugin (shared object) named pluginfilename
          and use it for optimization.

       -stats
          Print statistics from the code-generation passes. This is only mean-
          ingful for the just-in-time compiler, at present.

       -time-passes
          Record  the  amount of time needed for each code-generation pass and
          print it to standard error.

       -version
          Print out the version of lli and exit without doing anything else.

TARGET OPTIONS
       -mtriple=target triple
          Override the target triple specified in the input bitcode file  with
          the  specified  string.   This  may result in a crash if you pick an
          architecture which is not compatible with the current system.

       -march=arch
          Specify the architecture for which to generate assembly,  overriding
          the target encoded in the bitcode file.  See the output of llc -help
          for a list of valid architectures.  By default this is inferred from
          the target triple or autodetected to the current architecture.

       -mcpu=cpuname
          Specify a specific chip in the current architecture to generate code
          for.  By default this is inferred from the target triple and autode-
          tected  to  the current architecture.  For a list of available CPUs,
          use: llvm-as < /dev/null | llc -march=xyz -mcpu=help

       -mattr=a1,+a2,-a3,...
          Override or control specific  attributes  of  the  target,  such  as
          whether  SIMD  operations  are  enabled  or not.  The default set of
          attributes is set by the current  CPU.   For  a  list  of  available
          attributes, use: llvm-as < /dev/null | llc -march=xyz -mattr=help

FLOATING POINT OPTIONS
       -disable-excess-fp-precision
          Disable optimizations that may increase floating point precision.

       -enable-no-infs-fp-math
          Enable optimizations that assume no Inf values.

       -enable-no-nans-fp-math
          Enable optimizations that assume no NAN values.

       -enable-unsafe-fp-math
          Causes  lli to enable optimizations that may decrease floating point
          precision.

       -soft-float
          Causes lli to generate software floating point library calls instead
          of equivalent hardware instructions.

CODE GENERATION OPTIONS
       -code-model=model
          Choose the code model from:

              default: Target default code model
              small: Small code model
              kernel: Kernel code model
              medium: Medium code model
              large: Large code model

       -disable-post-RA-scheduler
          Disable scheduling after register allocation.

       -disable-spill-fusing
          Disable fusing of spill code into instructions.

       -jit-enable-eh
          Exception handling should be enabled in the just-in-time compiler.

       -join-liveintervals
          Coalesce copies (default=true).

       -nozero-initialized-in-bss  Don't  place  zero-initialized symbols into
       the BSS section.

       -pre-RA-sched=scheduler
          Instruction schedulers available (before register allocation):

              =default: Best scheduler for the target
              =none: No scheduling: breadth first sequencing
              =simple: Simple two pass scheduling: minimize critical path and maximize processor utilization
              =simple-noitin: Simple two pass scheduling: Same as simple except using generic latency
              =list-burr: Bottom-up register reduction list scheduling
              =list-tdrr: Top-down register reduction list scheduling
              =list-td: Top-down list scheduler -print-machineinstrs - Print generated machine code

       -regalloc=allocator
          Register allocator to use (default=linearscan)

              =bigblock: Big-block register allocator
              =linearscan: linear scan register allocator =local -   local register allocator
              =simple: simple register allocator

       -relocation-model=model
          Choose relocation model from:

              =default: Target default relocation model
              =static: Non-relocatable code =pic -   Fully relocatable, position independent code
              =dynamic-no-pic: Relocatable external references, non-relocatable code

       -spiller
          Spiller to use (default=local)

              =simple: simple spiller
              =local: local spiller

       -x86-asm-syntax=syntax
          Choose style of code to emit from X86 backend:

              =att: Emit AT&T-style assembly
              =intel: Emit Intel-style assembly

EXIT STATUS
       If lli fails to load the program, it will exit with an exit code of  1.
       Otherwise, it will return the exit code of the program it executes.

SEE ALSO
       llc|llc

AUTHOR
       Maintained by The LLVM Team (http://llvm.org/).

COPYRIGHT
       2003-2016, LLVM Project

3.5                               2016-10-07                            LLI(1)

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