[llvm-dev] In ISel, where Constant<0> comes from?

[Gleb Popov via llvm-dev]

Thanks Tim and Krzysztof for pointing me in the right direction.

Indeed, when I started my backend I just blindly copied
LowerFormalArguments and LowerReturn from SPARC backend, and that's where
these FrameIndex'es and Constant's are coming from.

However, I haven't managed to get a "Constant<>" in the DAG when compiling
for X86. I'm interested in how it is lowered. Can you please give me some
guidance on this?
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