[llvm-dev] [Backend] Lowering branch with Base + Offset addressing mode
Yaotian Feng via llvm-dev
llvm-dev at lists.llvm.org
Thu Mar 5 23:01:34 PST 2020
I am currently writing a backend for a custom ISA. However, the jump and
calls are all in the form of a Base + Offset. I have tried to use a
Pseudo op and expand it in the /expandPostRAPseudoOp/ function, but that
seems to be a bit too late. As I would need to def/use a register (I
tried using regScavenger but since I also need do it in insert branch,
and sometimes a MBB that I need to insert branch into has no instruction
so regScavenger failed to iterate)
Is there any suggestions as of what is the proper way to do this if the
target effectively has only base + offset branch?
Here is the repository where I keep my code, if it helps.
Any help would be appreciated.
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