This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Unnecessary PRE optimization

> In general it will be tricky for latter passes to clean up the messes.
> The fundamental problem is that the address computation is exposed to
> PRE prematurely (for a given target ?) at GIMPLE level.


Yeah, i'm not sure PRE can really do anything different here.
I also think you would have a very hard time trying to stop everything
from moving invariant computations around at the tree level.
Might make more sense to finish the tree level with a global code
motion pass that is target sensitive or something.
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]