mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-29 23:12:55 +01:00
178 lines
3.4 KiB
Plaintext
178 lines
3.4 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
llc - LLVM static compiler
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
B<llc> [I<options>] [I<filename>]
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The B<llc> command compiles LLVM bytecode into assembly language for a
|
|
specified architecture. The assembly language output can then be passed through
|
|
a native assembler and linker to generate native code.
|
|
|
|
The choice of architecture for the output assembly code is automatically
|
|
determined from the input bytecode file, unless a B<-m> option is used to override
|
|
the default.
|
|
|
|
=head1 OPTIONS
|
|
|
|
If I<filename> is - or omitted, B<llc> reads LLVM bytecode from standard input.
|
|
Otherwise, it will read LLVM bytecode from I<filename>.
|
|
|
|
If the B<-o> option is omitted, then B<llc> will send its output to standard
|
|
output if the input is from standard input. If the B<-o> option specifies -,
|
|
then the output will also be sent to standard output.
|
|
|
|
If no B<-o> option is specified and an input file other than - is specified,
|
|
then B<llc> creates the output filename by taking the input filename,
|
|
removing any existing F<.bc> extension, and adding a F<.s> suffix.
|
|
|
|
Other B<llc> options are as follows:
|
|
|
|
=over
|
|
|
|
=item B<-f>
|
|
|
|
Overwrite output files. By default, B<llc> will refuse to overwrite
|
|
an output file which already exists.
|
|
|
|
=item B<-march>=I<arch>
|
|
|
|
Specify the architecture for which to generate assembly. Valid
|
|
architectures are:
|
|
|
|
=over
|
|
|
|
=item I<x86>
|
|
|
|
Intel IA-32 (Pentium and above)
|
|
|
|
=item I<ppc32>
|
|
|
|
32-bit PowerPC (MacOS X, 32-bit ABI)
|
|
|
|
=item I<sparcv9>
|
|
|
|
64-bit SPARC V9
|
|
|
|
=item I<c>
|
|
|
|
Emit C code, not assembly
|
|
|
|
=back
|
|
|
|
=item B<--disable-fp-elim>
|
|
|
|
Disable frame pointer elimination optimization.
|
|
|
|
=item B<--enable-correct-eh-support>
|
|
|
|
Instruct the B<lowerinvoke> pass to insert code for correct exception handling
|
|
support. This is expensive and is by default omitted for efficiency.
|
|
|
|
=item B<--help>
|
|
|
|
Print a summary of command line options.
|
|
|
|
=item B<--stats>
|
|
|
|
Print statistics recorded by code-generation passes.
|
|
|
|
=item B<--time-passes>
|
|
|
|
Record the amount of time needed for each pass and print a report to standard
|
|
error.
|
|
|
|
=item B<--print-machineinstrs>
|
|
|
|
Print generated machine code between compilation phases (useful for debugging).
|
|
|
|
=item B<--regalloc>=I<allocator>
|
|
|
|
Specify the register allocator to use. The default I<allocator> is I<local>.
|
|
Valid register allocators are:
|
|
|
|
=over
|
|
|
|
=item I<simple>
|
|
|
|
Very simple "always spill" register allocator
|
|
|
|
=item I<local>
|
|
|
|
Local register allocator
|
|
|
|
=item I<linearscan>
|
|
|
|
Linear scan global register allocator
|
|
|
|
=item I<iterativescan>
|
|
|
|
Iterative scan global register allocator
|
|
|
|
=back
|
|
|
|
=item B<--spiller>=I<spiller>
|
|
|
|
Specify the spiller to use for register allocators that support it. Currently
|
|
this option is used only by the linear scan register allocator. The default
|
|
I<spiller> is I<local>. Valid spillers are:
|
|
|
|
=over
|
|
|
|
=item I<simple>
|
|
|
|
Simple spiller
|
|
|
|
=item I<local>
|
|
|
|
Local spiller
|
|
|
|
=back
|
|
|
|
=back
|
|
|
|
=head2 Intel IA-32-specific Options
|
|
|
|
=over
|
|
|
|
=item B<--x86-asm-syntax=att|intel>
|
|
|
|
Specify whether to emit assembly code in AT&T syntax (the default) or intel
|
|
syntax.
|
|
|
|
=back
|
|
|
|
=head2 SPARCV9-specific Options
|
|
|
|
=over
|
|
|
|
=item B<--disable-peephole>
|
|
|
|
Disable peephole optimization pass.
|
|
|
|
=item B<--disable-sched>
|
|
|
|
Disable local scheduling pass.
|
|
|
|
=back
|
|
|
|
=head1 EXIT STATUS
|
|
|
|
If B<llc> succeeds, it will exit with 0. Otherwise, if an error occurs,
|
|
it will exit with a non-zero value.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<lli|lli>
|
|
|
|
=head1 AUTHORS
|
|
|
|
Maintained by the LLVM Team (L<http://llvm.cs.uiuc.edu>).
|
|
|
|
=cut
|