299 lines
7.2 KiB
Groff
299 lines
7.2 KiB
Groff
.\" $FreeBSD$
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.\" Man page generated from reStructuredText.
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.TH "LLI" "1" "2018-08-02" "7" "LLVM"
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.SH NAME
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lli \- directly execute programs from LLVM bitcode
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.SH SYNOPSIS
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.sp
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\fBlli\fP [\fIoptions\fP] [\fIfilename\fP] [\fIprogram args\fP]
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.SH DESCRIPTION
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.sp
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\fBlli\fP directly executes programs in LLVM bitcode format. It takes a program
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in LLVM bitcode format and executes it using a just\-in\-time compiler or an
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interpreter.
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.sp
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\fBlli\fP is \fInot\fP an emulator. It will not execute IR of different architectures
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and it can only interpret (or JIT\-compile) for the host architecture.
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.sp
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The JIT compiler takes the same arguments as other tools, like \fBllc\fP,
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but they don\(aqt necessarily work for the interpreter.
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.sp
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If \fIfilename\fP is not specified, then \fBlli\fP reads the LLVM bitcode for the
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program from standard input.
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.sp
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The optional \fIargs\fP specified on the command line are passed to the program as
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arguments.
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.SH GENERAL OPTIONS
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.INDENT 0.0
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.TP
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.B \-fake\-argv0=executable
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Override the \fBargv[0]\fP value passed into the executing program.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-force\-interpreter={false,true}
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If set to true, use the interpreter even if a just\-in\-time compiler is available
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for this architecture. Defaults to false.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-help
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Print a summary of command line options.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-load=pluginfilename
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Causes \fBlli\fP to load the plugin (shared object) named \fIpluginfilename\fP and use
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it for optimization.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-stats
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Print statistics from the code\-generation passes. This is only meaningful for
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the just\-in\-time compiler, at present.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-time\-passes
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Record the amount of time needed for each code\-generation pass and print it to
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standard error.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-version
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Print out the version of \fBlli\fP and exit without doing anything else.
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.UNINDENT
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.SH TARGET OPTIONS
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.INDENT 0.0
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.TP
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.B \-mtriple=target triple
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Override the target triple specified in the input bitcode file with the
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specified string. This may result in a crash if you pick an
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architecture which is not compatible with the current system.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-march=arch
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Specify the architecture for which to generate assembly, overriding the target
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encoded in the bitcode file. See the output of \fBllc \-help\fP for a list of
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valid architectures. By default this is inferred from the target triple or
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autodetected to the current architecture.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-mcpu=cpuname
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Specify a specific chip in the current architecture to generate code for.
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By default this is inferred from the target triple and autodetected to
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the current architecture. For a list of available CPUs, use:
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\fBllvm\-as < /dev/null | llc \-march=xyz \-mcpu=help\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-mattr=a1,+a2,\-a3,...
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Override or control specific attributes of the target, such as whether SIMD
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operations are enabled or not. The default set of attributes is set by the
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current CPU. For a list of available attributes, use:
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\fBllvm\-as < /dev/null | llc \-march=xyz \-mattr=help\fP
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.UNINDENT
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.SH FLOATING POINT OPTIONS
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.INDENT 0.0
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.TP
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.B \-disable\-excess\-fp\-precision
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Disable optimizations that may increase floating point precision.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-enable\-no\-infs\-fp\-math
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Enable optimizations that assume no Inf values.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-enable\-no\-nans\-fp\-math
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Enable optimizations that assume no NAN values.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-enable\-unsafe\-fp\-math
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Causes \fBlli\fP to enable optimizations that may decrease floating point
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precision.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-soft\-float
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Causes \fBlli\fP to generate software floating point library calls instead of
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equivalent hardware instructions.
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.UNINDENT
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.SH CODE GENERATION OPTIONS
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.INDENT 0.0
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.TP
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.B \-code\-model=model
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Choose the code model from:
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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default: Target default code model
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small: Small code model
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kernel: Kernel code model
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medium: Medium code model
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large: Large code model
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-disable\-post\-RA\-scheduler
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Disable scheduling after register allocation.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-disable\-spill\-fusing
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Disable fusing of spill code into instructions.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-jit\-enable\-eh
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Exception handling should be enabled in the just\-in\-time compiler.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-join\-liveintervals
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Coalesce copies (default=true).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-nozero\-initialized\-in\-bss
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Don\(aqt place zero\-initialized symbols into the BSS section.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-pre\-RA\-sched=scheduler
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Instruction schedulers available (before register allocation):
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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=default: Best scheduler for the target
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=none: No scheduling: breadth first sequencing
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=simple: Simple two pass scheduling: minimize critical path and maximize processor utilization
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=simple\-noitin: Simple two pass scheduling: Same as simple except using generic latency
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=list\-burr: Bottom\-up register reduction list scheduling
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=list\-tdrr: Top\-down register reduction list scheduling
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=list\-td: Top\-down list scheduler \-print\-machineinstrs \- Print generated machine code
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-regalloc=allocator
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Register allocator to use (default=linearscan)
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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=bigblock: Big\-block register allocator
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=linearscan: linear scan register allocator =local \- local register allocator
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=simple: simple register allocator
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-relocation\-model=model
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Choose relocation model from:
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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=default: Target default relocation model
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=static: Non\-relocatable code =pic \- Fully relocatable, position independent code
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=dynamic\-no\-pic: Relocatable external references, non\-relocatable code
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-spiller
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Spiller to use (default=local)
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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=simple: simple spiller
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=local: local spiller
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-x86\-asm\-syntax=syntax
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Choose style of code to emit from X86 backend:
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.INDENT 7.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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=att: Emit AT&T\-style assembly
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=intel: Emit Intel\-style assembly
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.SH EXIT STATUS
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.sp
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If \fBlli\fP fails to load the program, it will exit with an exit code of 1.
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Otherwise, it will return the exit code of the program it executes.
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.SH SEE ALSO
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.sp
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\fBllc\fP
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.SH AUTHOR
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Maintained by The LLVM Team (http://llvm.org/).
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.SH COPYRIGHT
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2003-2018, LLVM Project
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.\" Generated by docutils manpage writer.
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