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This option caused LowerInvoke to generate code using SJLJ-based exception handling, but there is no code left that interprets the jmp_buf stack that the resulting code maintained (llvm.sjljeh.jblist). This option has been obsolete for a while, and replaced by SjLjEHPrepare. This leaves the default behaviour of LowerInvoke, which is to convert invokes to calls. Differential Revision: http://llvm-reviews.chandlerc.com/D3136 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204388 91177308-0d34-0410-b5e6-96231b3b80d8
295 lines
5.7 KiB
ReStructuredText
295 lines
5.7 KiB
ReStructuredText
lli - directly execute programs from LLVM bitcode
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=================================================
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SYNOPSIS
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--------
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**lli** [*options*] [*filename*] [*program args*]
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DESCRIPTION
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-----------
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**lli** 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, if one is
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available for the current architecture, or an interpreter. **lli** takes all of
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the same code generator options as llc|llc, but they are only effective when
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**lli** is using the just-in-time compiler.
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If *filename* is not specified, then **lli** reads the LLVM bitcode for the
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program from standard input.
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The optional *args* specified on the command line are passed to the program as
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arguments.
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GENERAL OPTIONS
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---------------
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**-fake-argv0**\ =\ *executable*
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Override the ``argv[0]`` value passed into the executing program.
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**-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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**-help**
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Print a summary of command line options.
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**-load**\ =\ *pluginfilename*
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Causes **lli** to load the plugin (shared object) named *pluginfilename* and use
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it for optimization.
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**-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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**-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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**-version**
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Print out the version of **lli** and exit without doing anything else.
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TARGET OPTIONS
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--------------
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**-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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**-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 **llc -help** 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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**-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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**llvm-as < /dev/null | llc -march=xyz -mcpu=help**
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**-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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**llvm-as < /dev/null | llc -march=xyz -mattr=help**
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FLOATING POINT OPTIONS
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----------------------
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**-disable-excess-fp-precision**
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Disable optimizations that may increase floating point precision.
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**-enable-no-infs-fp-math**
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Enable optimizations that assume no Inf values.
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**-enable-no-nans-fp-math**
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Enable optimizations that assume no NAN values.
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**-enable-unsafe-fp-math**
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Causes **lli** to enable optimizations that may decrease floating point
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precision.
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**-soft-float**
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Causes **lli** to generate software floating point library calls instead of
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equivalent hardware instructions.
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CODE GENERATION OPTIONS
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-----------------------
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**-code-model**\ =\ *model*
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Choose the code model from:
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.. code-block:: perl
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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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**-disable-post-RA-scheduler**
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Disable scheduling after register allocation.
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**-disable-spill-fusing**
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Disable fusing of spill code into instructions.
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**-jit-enable-eh**
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Exception handling should be enabled in the just-in-time compiler.
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**-join-liveintervals**
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Coalesce copies (default=true).
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**-nozero-initialized-in-bss** Don't place zero-initialized symbols into the BSS section.
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**-pre-RA-sched**\ =\ *scheduler*
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Instruction schedulers available (before register allocation):
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.. code-block:: perl
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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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**-regalloc**\ =\ *allocator*
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Register allocator to use (default=linearscan)
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.. code-block:: perl
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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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**-relocation-model**\ =\ *model*
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Choose relocation model from:
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.. code-block:: perl
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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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**-spiller**
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Spiller to use (default=local)
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.. code-block:: perl
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=simple: simple spiller
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=local: local spiller
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**-x86-asm-syntax**\ =\ *syntax*
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Choose style of code to emit from X86 backend:
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.. code-block:: perl
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=att: Emit AT&T-style assembly
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=intel: Emit Intel-style assembly
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EXIT STATUS
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-----------
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If **lli** 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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SEE ALSO
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--------
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llc|llc
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