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| .IX Title "LLI 1" |
| .TH LLI 1 "2006-03-13" "CVS" "LLVM Command Guide" |
| .SH "NAME" |
| lli \- directly execute programs from LLVM bytecode |
| .SH "SYNOPSIS" |
| .IX Header "SYNOPSIS" |
| \&\fBlli\fR [\fIoptions\fR] [\fIfilename\fR] [\fIprogram args\fR] |
| .SH "DESCRIPTION" |
| .IX Header "DESCRIPTION" |
| \&\fBlli\fR directly executes programs in \s-1LLVM\s0 bytecode format. It takes a program |
| in \s-1LLVM\s0 bytecode format and executes it using a just-in-time compiler, if one is |
| available for the current architecture, or an interpreter. \fBlli\fR takes all of |
| the same code generator options as llc, but they are only effective when |
| \&\fBlli\fR is using the just-in-time compiler. |
| .PP |
| If \fIfilename\fR is not specified, then \fBlli\fR reads the \s-1LLVM\s0 bytecode for the |
| program from standard input. |
| .PP |
| The optional \fIargs\fR specified on the command line are passed to the program as |
| arguments. |
| .SH "OPTIONS" |
| .IX Header "OPTIONS" |
| .IP "\fB\-help\fR" 4 |
| .IX Item "-help" |
| Print a summary of command line options. |
| .IP "\fB\-stats\fR" 4 |
| .IX Item "-stats" |
| Print statistics from the code-generation passes. This is only meaningful for |
| the just-in-time compiler, at present. |
| .IP "\fB\-time\-passes\fR" 4 |
| .IX Item "-time-passes" |
| Record the amount of time needed for each code-generation pass and print it to |
| standard error. |
| .IP "\fB\-mtriple\fR=\fItarget triple\fR" 4 |
| .IX Item "-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. |
| .IP "\fB\-march\fR=\fIarch\fR" 4 |
| .IX Item "-march=arch" |
| Specify the architecture for which to generate assembly, overriding the target |
| encoded in the bytecode file. See the output of \fBllc \-\-help\fR for a list of |
| valid architectures. By default this is inferred from the target triple or |
| autodetected to the current architecture. |
| .IP "\fB\-mcpu\fR=\fIcpuname\fR" 4 |
| .IX Item "-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: |
| \&\fBllvm-as < /dev/null | llc \-march=xyz \-mcpu=help\fR |
| .IP "\fB\-mattr\fR=\fIa1,+a2,\-a3,...\fR" 4 |
| .IX Item "-mattr=a1,+a2,-a3,..." |
| Override or control specific attributes of the target, such as whether \s-1SIMD\s0 |
| operations are enabled or not. The default set of attributes is set by the |
| current \s-1CPU\s0. For a list of available attributes, use: |
| \&\fBllvm-as < /dev/null | llc \-march=xyz \-mattr=help\fR |
| .IP "\fB\-force\-interpreter\fR=\fI{false,true}\fR" 4 |
| .IX Item "-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. |
| .IP "\fB\-f\fR=\fIname\fR" 4 |
| .IX Item "-f=name" |
| Call the function named \fIname\fR to start the program. Note: The |
| function is assumed to have the C signature \f(CW\*(C`int\*(C'\fR \fIname\fR \f(CW\*(C`(int, |
| char **, char **)\*(C'\fR. If you try to use this option to call a function of |
| incompatible type, undefined behavior may result. Defaults to \f(CW\*(C`main\*(C'\fR. |
| .SH "EXIT STATUS" |
| .IX Header "EXIT STATUS" |
| If \fBlli\fR 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. |
| .SH "SEE ALSO" |
| .IX Header "SEE ALSO" |
| llc |
| .SH "AUTHOR" |
| .IX Header "AUTHOR" |
| Maintained by the \s-1LLVM\s0 Team (<http://llvm.org>). |