LLVM: `lli` tool

NAME

lli

SYNOPSIS

lli [options] [filename] [args ...]

DESCRIPTION

lli directly executes programs in LLVM 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 the llc tool, but they are only applicable when the just-in-time compiler is being used.

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.

OPTIONS

-array-checks
Enable array bound checks. If an LLVM program attempts to access an element of an array which is not within the size of that array, lli will print an error message and call abort(3). This is presently only applicable to the interpreter.
-help
Print a summary of command line options.
-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.
-march=<arch>
Use the specified non-default architecture when selecting a code generator for the just-in-time compiler. This may result in a crash if you pick an architecture which is not compatible with the hardware you are running lli on.
-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.
-trace
Print an LLVM-instruction-level dynamic execution trace. This is presently only applicable to the interpreter.
-f=<name>
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".

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.