[PATCH] D79794: Change the INLINEASM_BR MachineInstr to be a non-terminating instruction.

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

> One method to perhaps address your concerns would be to create a "terminating" COPY instruction. This allows one to reload registers after the ASM block. There were some sticky issues with it. Going this method was much easier. (Yes, I know that's not the best reason to do something, but...) However, the only issue a hypothetical terminating COPY would solve is issues with instructions invalidly moving past the INLINEASM_BR.

But that still would mean we end up with terminator instructions that assign registers, so we're still in this regalloc grey-area because that is technically not supported.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D79794/new/

https://reviews.llvm.org/D79794