diff options
author | Brian Gaeke <gaeke@uiuc.edu> | 2004-06-02 19:12:38 +0000 |
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committer | Brian Gaeke <gaeke@uiuc.edu> | 2004-06-02 19:12:38 +0000 |
commit | f36e2d5a9ae326c7bd9006c72b53061806482e33 (patch) | |
tree | 14eb5a72fb857ef67656e51e132cf04fbe233cc4 /docs | |
parent | 900bf8ca85294c49b3f03c1007d60e035c17137e (diff) |
Look, it's a gccas pod.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13960 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
-rw-r--r-- | docs/CommandGuide/gccas.pod | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/docs/CommandGuide/gccas.pod b/docs/CommandGuide/gccas.pod new file mode 100644 index 0000000000..edfa8ee730 --- /dev/null +++ b/docs/CommandGuide/gccas.pod @@ -0,0 +1,83 @@ + +=pod + +=head1 NAME + +gccas - optimizing LLVM assembler + +=head1 SYNOPSIS + +gccas [options] filename + +=head1 DESCRIPTION + +The B<gccas> utility takes an LLVM assembly file generated by the +L<llvm-gcc|llvm-gcc> or L<llvm-g++|llvm-g++> 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. + +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. + +=head1 OPTIONS + +=over + +=item B<--help> + +Print a summary of command line options. + +=item B<-o> F<filename> + +Specify the name of the output file which will hold the assembled bytecode. + +=item B<--disable-inlining> + +Disable the inlining pass. By default, it is enabled. + +=item B<--disable-opt> + +Disable all assembler-time optimization passes. + +=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<--stats> + +Print statistics. + +=item B<--time-passes> + +Record the amount of time needed for each pass and print it to standard +error. + +=item B<--verify> + +Verify each pass result. + +=back + +=head1 EXIT STATUS + +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. + +=head1 SEE ALSO + +L<llvm-as>, L<gccld> + +=head1 AUTHORS + +Maintained by the LLVM Team (L<http://llvm.cs.uiuc.edu>). + +=cut + |