| =pod |
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| =head1 NAME |
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| gccas - optimizing LLVM assembler |
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| =head1 SYNOPSIS |
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| B<gccas> [I<options>] I<filename> |
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| =head1 DESCRIPTION |
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| The B<gccas> utility takes an LLVM assembly file generated by the |
| L<llvmgcc|llvmgcc> or L<llvmg++|llvmgxx> front-ends and converts |
| it into an LLVM bytecode file. It is primarily used by the GCC |
| front end, and as such, attempts to mimic the interface provided |
| by the default system assembler so that it can act as a "drop-in" |
| replacement. |
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| B<gccas> performs a number of optimizations on the input program, |
| including but not limited to: promotion of stack values to SSA |
| registers; elimination of dead globals, function arguments, code, |
| and types; tail-call elimination; loop-invariant code motion; global |
| common-subexpression elimination; and sparse conditional constant |
| propagation. |
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| =head1 OPTIONS |
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| =over |
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| =item B<--help> |
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| Print a summary of command line options. |
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| =item B<-o> F<filename> |
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| Specify the name of the output file which will hold the assembled bytecode. |
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| =item B<--disable-inlining> |
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| Disable the inlining pass. By default, it is enabled. |
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| =item B<--disable-opt> |
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| Disable all assembler-time optimization passes. |
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| =item B<--stats> |
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| Print statistics. |
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| =item B<--time-passes> |
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| Record the amount of time needed for each pass and print it to standard |
| error. |
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| =item B<--verify> |
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| Verify each pass result. |
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| =back |
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| =head1 EXIT STATUS |
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| If B<gccas> succeeds, it will exit with an exit status of 0. |
| Otherwise, if an error occurs, it will exit with a non-zero exit |
| status. |
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| =head1 SEE ALSO |
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| L<llvm-as|llvm-as>, L<gccld|gccld> |
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| =head1 AUTHORS |
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| Maintained by the LLVM Team (L<http://llvm.cs.uiuc.edu>). |
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| =cut |