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Re: [PATCH]: Implement must-def kill operand
On Wed, 2004-10-20 at 14:20, Daniel Berlin wrote:
> 1. Do a quick propagation pass in DCE to make sure def-def phis that
> are used in necessary statements don't die. (at that point, plain
> def-def renaming will work)
> 2. Mark the must-def operand as necessary if it's a phi, and the only
> immediate use of the phi is in the must-def operand (I'm assuming it
> could appear in a may-def or vuse somewhere else, in which case it's
> necessary).
> 3. Use the full renamer, which will simply put the phi back after DCE
> removes it.
>
4. If the RHS of a V_MUST_DEF is a PHI node, mark it necessary?
Diego.