[CIR][ThroughMLIR] Lower UnreachableOp #1539
Merged
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This also removes some unused
#include
s.I choose to allow lowering to LLVM dialect when we're lowering CIR to MLIR core dialects, because some operations don't have their counterparts in these dialects (for example,
UnreachableOp -> llvm.unreachable
andLLVMIntrinsicCallOp -> cir.llvm.intr.xxx
). I don't think we can delay them to the MLIR->LLVM pass as it seems we assume all CIR operations have been lowered after CIR->MLIR conversion.