Interprocedural Optimization: Examples
Example: -Qip (Linux: -ip)
prompt>icl -Qip myprog.cpp
Example: -Qipo (Linux: -ipo)
The following is a two step example from the Intel® C++ Compiler
User's Guide:
- prompt>icl -Qipo -c myfile_a.c myfile_b.c myfile_c.c
Use -c to stop compilation after generating
.obj files. Each object file has the intermediate result (IR) for the
corresponding source file. With the preceding results, you can now optimize
interprocedurally:
- prompt>icl -Fenu_ipo_file -Qipo myfile_a.obj
myfile_b.obj myfile_c.obj
The -Fe option stores the executable in nu_ipo_file.exe.
Multifile IPO is applied only to modules that have an IR, otherwise
the object file passes to the link stage.
You can also combine the above two steps in the following command line:
prompt>icl -Qipo -Fenu_ipo_file myfile_a.c
myfile_b.c myfile_c.c
You can also use the xilink tool to create multifile IPO executables. See
the Intel Compiler User's Guide for more information.
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