lli - directly execute programs from LLVM bitcode
lli [options] [filename] [program args]
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.
- -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.
- -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
- -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-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
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.
llc
Maintained by the LLVM Team (http://llvm.org).