On a synthetic command line consisting of almost all defined options,
this drops wall time from .00494 to .00336 and user time from .00258
to .00105.
On the same benchmark, clang-driver is about 15% faster than the
primary gcc driver and almost twice as fast as the gcc driver driver.
llvm-svn: 67564
handled by driver.
- This is not very precise, we use it to drive the "forward-to-gcc"
predicate, when trying to talk to a generic gcc tool.
- Slightly better than what ccc was doing, and should be good
enough. Platforms which want a robust driver should implement a
proper tool chain.
llvm-svn: 67181
- Use OPT_ prefix for ids.
- Reference groups and aliases by shortend id (on the theory that
this is more readable).
- Rename the special option ids to more protected names.
llvm-svn: 66767
- Add Options.def file, collects option information.
- Actual option instantiation is handled lazily by OptTable to allow
the driver to not need to instantiate all options.
- cast<> support for Option, other minor tweaks.
llvm-svn: 66028
Daniel Dunbar