lli - directly execute programs from LLVM bytecode


lli [options] [filename] [program args]


lli directly executes programs in LLVM bytecode format. It takes a program in LLVM bytecode 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 bytecode for the program from standard input.

The optional args specified on the command line are passed to the program as arguments.


Print a summary of command line options.

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

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

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

Specify the architecture for which to generate assembly, overriding the target encoded in the bytecode 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.

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

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

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

Call the function named name to start the program. Note: The function is assumed to have the C signature int name (int, char **, char **). If you try to use this option to call a function of incompatible type, undefined behavior may result. Defaults to main.


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.




Maintained by the LLVM Team (