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.IX Title "GCCAS 1"
.TH GCCAS 1 "1.3" "2004-07-04" "LLVM Command Guide"
.UC
.SH "NAME"
gccas \- optimizing \s-1LLVM\s0 assembler
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBgccas\fR [\fIoptions\fR] \fIfilename\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBgccas\fR utility takes an \s-1LLVM\s0 assembly file generated by the
llvmgcc or llvmg++ front-ends and converts
it into an \s-1LLVM\s0 bytecode file.  It is primarily used by the \s-1GCC\s0
front end, and as such, attempts to mimic the interface provided
by the default system assembler so that it can act as a \*(L"drop-in\*(R"
replacement.
.PP
\&\fBgccas\fR performs a number of optimizations on the input program,
including but not limited to: promotion of stack values to \s-1SSA\s0
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.
.SH "OPTIONS"
.IX Header "OPTIONS"
.Ip "\fB\*(--help\fR" 4
.IX Item "help"
Print a summary of command line options.
.Ip "\fB\-o\fR \fIfilename\fR" 4
.IX Item "-o filename"
Specify the name of the output file which will hold the assembled bytecode.
.Ip "\fB\*(--disable-inlining\fR" 4
.IX Item "disable-inlining"
Disable the inlining pass.  By default, it is enabled.
.Ip "\fB\*(--disable-opt\fR" 4
.IX Item "disable-opt"
Disable all assembler-time optimization passes.
.Ip "\fB\*(--stats\fR" 4
.IX Item "stats"
Print statistics.
.Ip "\fB\*(--time-passes\fR" 4
.IX Item "time-passes"
Record the amount of time needed for each pass and print it to standard
error.
.Ip "\fB\*(--verify\fR" 4
.IX Item "verify"
Verify each pass result.
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
If \fBgccas\fR succeeds, it will exit with an exit status of 0.
Otherwise, if an error occurs, it will exit with a non-zero exit
status.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
llvm-as, gccld
.SH "AUTHORS"
.IX Header "AUTHORS"
Maintained by the \s-1LLVM\s0 Team (http://llvm.cs.uiuc.edu).