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
program in LLVM bitcode format and executes it using a just-in-time
compiler, if one is available for the current architecture, or an
interpreter. lli takes all of the same code generator options as llc,
but they are only effective when lli is using the just-in-time
compiler.
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
program 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=puginfilename
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
meaningful 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
autodetected 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-finite-only-fp-math
Enable optimizations that assumes only finite floating point math.
That is, there is no NAN or Inf 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.
-enable-correct-eh-support
Make the -lowerinvoke pass insert expensive, but correct, EH code.
-enable-eh
Exception handling should be emitted.
-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
AUTHOR
Maintained by the LLVM Team (<http://llvm.org>).