[LLVMdev] PassManager vs. FunctionPassManager

[Devang Patel]

On Fri, Jun 4, 2010 at 7:49 AM, David Greene <dag at cray.com> wrote:

> What's the point of having two pass managers here?  Why not just use
> "Passes" for everything?

This is done to replicate what llvm-gcc does. First pass manager to
optimizer each function individually at the end of the function.
Second pass manager to optimize entire module.  Add
-fdebug-pass-arguments on the llvm-gcc command line for more info.

-
Devang