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Title "LLI 1" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
lli - directly execute programs from LLVM bitcode Header "SYNOPSIS" \fBlli [options] [filename] [program args] Header "DESCRIPTION" \fBlli directly executes programs in \s-1LLVM\s0 bitcode format. It takes a program in \s-1LLVM\s0 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 \fBlli is using the just-in-time compiler.

If filename is not specified, then lli reads the \s-1LLVM\s0 bitcode for the program from standard input.

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

Header "GENERAL OPTIONS" Item "-fake-argv0=executable" Override the \*(C`argv[0]\*(C' value passed into the executing program. 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. Item "-help" Print a summary of command line options. Item "-load=puginfilename" Causes lli to load the plugin (shared object) named pluginfilename and use it for optimization. Item "-stats" Print statistics from the code-generation passes. This is only meaningful for the just-in-time compiler, at present. Item "-time-passes" Record the amount of time needed for each code-generation pass and print it to standard error. Item "-version" Print out the version of lli and exit without doing anything else. Header "TARGET OPTIONS" Item "-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. Item "-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. 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 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 Header "FLOATING POINT OPTIONS" Item "-disable-excess-fp-precision" Disable optimizations that may increase floating point precision. Item "-enable-no-infs-fp-math" Enable optimizations that assume no Inf values. Item "-enable-no-nans-fp-math" Enable optimizations that assume no \s-1NAN\s0 values. Item "-enable-unsafe-fp-math" Causes lli to enable optimizations that may decrease floating point precision. Item "-soft-float" Causes lli to generate software floating point library calls instead of equivalent hardware instructions. Header "CODE GENERATION OPTIONS" Item "-code-model=model" Choose the code model from: .Sp .Vb 5 default: Target default code model small: Small code model kernel: Kernel code model medium: Medium code model large: Large code model .Ve Item "-disable-post-RA-scheduler" Disable scheduling after register allocation. Item "-disable-spill-fusing" Disable fusing of spill code into instructions. Item "-enable-correct-eh-support" Make the -lowerinvoke pass insert expensive, but correct, \s-1EH\s0 code. Item "-jit-enable-eh" Exception handling should be enabled in the just-in-time compiler. Item "-join-liveintervals" Coalesce copies (default=true). Item "-nozero-initialized-in-bss Don't place zero-initialized symbols into the BSS section."

0

Item "-pre-RA-sched=scheduler"

Instruction schedulers available (before register allocation): .Sp .Vb 7 =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 .Ve

Item "-regalloc=allocator" Register allocator to use (default=linearscan) .Sp .Vb 3 =bigblock: Big-block register allocator =linearscan: linear scan register allocator =local - local register allocator =simple: simple register allocator .Ve Item "-relocation-model=model" Choose relocation model from: .Sp .Vb 3 =default: Target default relocation model =static: Non-relocatable code =pic - Fully relocatable, position independent code =dynamic-no-pic: Relocatable external references, non-relocatable code .Ve Item "-spiller" Spiller to use (default=local) .Sp .Vb 2 =simple: simple spiller =local: local spiller .Ve Item "-x86-asm-syntax=syntax" Choose style of code to emit from X86 backend: .Sp .Vb 2 =att: Emit AT&T-style assembly =intel: Emit Intel-style assembly .Ve Header "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. Header "SEE ALSO" llc Header "AUTHOR" Maintained by the \s-1LLVM\s0 Team (<http://llvm.org/>).