[LLVMdev] [LLVMDev] Phi elimination: Who does what

[Cameron Zwarich]

At the moment, phi elimination happens before register allocation, so there can be no phis between memory locations.

Cameron

On Oct 5, 2010, at 4:19 PM, Jeff Kunkel wrote:

> When doing phi elimination, does one have to communicate with the
> stack space at all? The problem I see is two distinctly different
> registers may have two distinctly different stack spaces. When these
> registers are combined in a phi, the values the registers point to
> needs to be moved, combined, or otherwise taken care of. I understand
> this is the job of the stack space colorer, but when doing phi
> elimination, does one need to tell the stack space colorer that the
> phi did exist?
> 
> Thanks,
> Jeff Kunkel
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