| <html> |
| <title> |
| LLVM: opt tool |
| </title> |
| |
| <body> |
| |
| <center> |
| <h1>LLVM: opt tool</h1> |
| </center> |
| <HR> |
| |
| <h3> |
| NAME |
| </h3> |
| |
| opt |
| |
| <h3> |
| SYNOPSIS |
| </h3> |
| |
| opt [options] [filename] |
| <h3> |
| DESCRIPTION |
| </h3> |
| |
| The opt command is the LLVM optimizer. It takes LLVM bytecode as input, runs |
| the specified optimizations on it, and then outputs the optimized LLVM |
| bytecode. |
| <p> |
| |
| The optimizations available via opt depend upon what libraries were linked |
| into it as well as any additional libraries that have been loaded with the |
| -load option. Use the -help option to determine what optimizations you can use. |
| <p> |
| |
| If no filename is specified on the command line, opt reads its input from |
| standard input. |
| <p> |
| |
| If an output filename is not specified with the -o option, opt writes its |
| output to the standard output. |
| <h3> |
| OPTIONS |
| </h3> |
| |
| <ul> |
| <li> -f |
| <br> |
| Force overwrite. Normally, opt will refuse to overwrite an output |
| file that already exists. With this option, opt will overwrite the |
| output file and replace it with new bytecode. |
| <p> |
| |
| <li> -help |
| <br> |
| Print a summary of command line options. |
| <p> |
| |
| <li> -o <filename> |
| <br> |
| Specify the output filename. |
| <p> |
| |
| <li> -stats |
| <br> |
| Print statistics. |
| <p> |
| |
| <li> -time-passes |
| <br> |
| Record the amount of time needed for each pass and print it to standard |
| error. |
| <p> |
| |
| <li> -internalize-public-api-file <filename> |
| <br> |
| Preserve the symbol names listed in the file filename. |
| <p> |
| |
| <li> -internalize-public-api-list=<list> |
| <br> |
| Perserve the symbol names specified. |
| <p> |
| |
| <li> -q |
| <br> |
| Quiet mode. Do not print messages on whether the program was modified. |
| <p> |
| |
| <li> -load <plugin.so> |
| <br> |
| Load the dynamic object plugin.so. This object should register new |
| optimization passes. Once loaded, the object will add new command line |
| options to enable various optimizations. To see the new complete list |
| of optimizations, use the -help and -load options together: |
| <p> |
| opt -load <plugin.so> -help |
| <p> |
| |
| <li> -p |
| <br> |
| Print module after each transformation. |
| <p> |
| </ul> |
| |
| <h3> |
| EXIT STATUS |
| </h3> |
| |
| If opt succeeds, it will exit with 0. Otherwise, if an error occurs, it |
| will exit with a non-zero value. |
| |
| <h3> |
| SEE ALSO |
| </h3> |
| analyze |
| |
| <HR> |
| <a href="http://llvm.cs.uiuc.edu">LLVM Team</a> |
| </body> |
| </html> |
| |