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: Redundant logical operations left after early splitting


This would indicate that simplify-rtx inside fwprop is removing OR Rx,0
but not picking up the the additionally revealed forward propagation oppertunities
This would seem to be an avoidable limitation.

Yes, can you send me your MD patch and a simple testcase? fwprop is supposed to be "cascading", and some bugs in cascading were already revealed by the AVR port.

It might be even more worthwhile to try *moving* fwprop2 after combine, then.

Paolo

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]