On 2/29/08 7:04 PM, Steven Bosscher wrote:
I am not sure what would happen if GCC would start using FUD chains. Is it like in SSA that every register is assigned only once?
But this would only affect the UD chains built by the DF code. My idea is to build the same UD chains, but make them sparse instead of the dense web we have today. None of this would be in the IL stream, only on the DF web.
Representing PHI nodes as a NOP could be an option for getting an initial implementation quickly.
Diego.
