[LLVMdev] register scavenger
arnold.schwaighofer at gmail.com
Sat Nov 10 16:39:33 PST 2012
CC the list.
On Sat, Nov 10, 2012 at 6:30 PM, Arnold Schwaighofer
<arnold.schwaighofer at gmail.com> wrote:
> Assuming you use the scavenger in your own code yes.
> A usage could look like:
> for all basic blocks BB:
> for all instructions CurrInst in block order:
> if CurrInst has virtual def
> CurrReg = RS->scavenge(CurrInst)
> replace virtual def by CurReg
> else if Insts has virtual use
> replace virtual use by CurReg
> Look at scavengeFrameVirtualRegs in PrologEpilogInserter.cpp for more
> detail (I left out some, error checking, etc).
> On Sat, Nov 10, 2012 at 6:15 PM, Reed Kotler <rkotler at mips.com> wrote:
>> When you say that the client calls "forward", who do you mean?
>> Do I need to call forward in addition to marking the use "kill"?
More information about the llvm-dev