[CIR][Builtin][NFC] More informative llvm_unreachable message in CIRGenBuiltinAArch64.cpp #1124
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We are still seeing crash message like
NYI UNREACHABLE executed at clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp:3304
, which is not convenient for triaging as our code base changes so fast, line number doesn't help much.So, here we replaced most of
llvm_unreachable("NYI")
with more informative message.