[llvm] [TableGen] Split large printInstruction() for NVPTX to avoid compiler limits (PR #218530)

[Kazu Hirata via llvm-commits]

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kazutakahirata wrote:

Move the definition of `EmitOverflowBytecodeSection` above `EmitPrintInstruction()` (e.g., right after `emitInstructions()` around line 185) so this forward declaration isn't needed.

https://github.com/llvm/llvm-project/pull/218530