[LLVMdev] Interaction of stacksave/restore and stack spills

[Keno Fischer]

Hi everyone,

I'm curious about the constraints that come with the usage of
llvm.stacksave/llvm.stackrestore. Specifically I was wondering what the
contract of their usage was with respect to SSA variables defined after
llvm.stacksave. It seems to me that they could get spilled to a stack slot,
which I'm concerned stackrestore might mess up. Is this a valid concern?

Thanks,
Keno
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