=head1 DESCRIPTION
The B<opt> command is the modular LLVM optimizer and analyzer. It takes LLVM
-bytecode as input, runs the specified optimizations or analyses on it, and then
-outputs the optimized LLVM bytecode or the analysis results. The function of
+source files as input, runs the specified optimizations or analyses on it, and then
+outputs the optimized file or the analysis results. The function of
B<opt> depends on whether the B<-analyze> option is given.
-When B<-analyze> is specified, B<opt> performs various analyses of LLVM
-bytecode. It will usually print the results on standard output, but in a few
-cases, it will print output to standard error or generate a file with the
-analysis output, which is usually done when the output is meant for another
-program.
+When B<-analyze> is specified, B<opt> performs various analyses of the input
+source. It will usually print the results on standard output, but in a few
+cases, it will print output to standard error or generate a file with the
+analysis output, which is usually done when the output is meant for another
+program.
While B<-analyze> is I<not> given, B<opt> attempts to produce an optimized
-bytecode file. The optimizations available via B<opt> depend upon what
+output file. The optimizations available via B<opt> depend upon what
libraries were linked into it as well as any additional libraries that have
been loaded with the B<-load> option. Use the B<-help> option to determine
what optimizations you can use.
If I<filename> is omitted from the command line or is I<->, B<opt> reads its
-input from standard input. The input must be an LLVM bytecode file.
+input from standard input. Inputs can be in either the LLVM assembly language
+format (.ll) or the LLVM bitcode format (.bc).
If an output filename is not specified with the B<-o> option, B<opt>
writes its output to the standard output.
=item B<-f>
-Force overwrite. Normally, B<opt> will refuse to overwrite an
-output file that already exists. With this option, B<opt> will
-overwrite the output file and replace it with new bytecode.
+Enable binary output on terminals. Normally, B<opt> will refuse to
+write raw bitcode output if the output stream is a terminal. With this option,
+B<opt> will write raw bitcode regardless of the output device.
=item B<-help>
Specify the output filename.
+=item B<-S>
+
+Write output in LLVM intermediate language (instead of bitcode).
+
=item B<-{passname}>
B<opt> provides the ability to run any of LLVM's optimization or analysis passes
might be useful for other front end compilers as well. To discover the full set
of options available, use the following command:
-=over
-
-B<llvm-as < /dev/null | opt -std-compile-opts -disable-output -debug-pass=Arguments>
-
-=back
+ llvm-as < /dev/null | opt -std-compile-opts -disable-output -debug-pass=Arguments
=item B<-disable-inlining>
enable various optimizations or analyses. To see the new complete list of
optimizations, use the B<-help> and B<-load> options together. For example:
-=over
-
-B<opt -load>=I<plugin> B<-help>
-
-=back
+ opt -load=plugin.so -help
=item B<-p>