Add new llvm.dbg.declare_value intrinsic. (#168132) For swift async code, we need to use a debug intrinsic that behaves like an llvm.dbg.declare but can take any location type rather than just a pointer or integer. To solve this, a new debug instrinsic called llvm.dbg.declare_value has been created, which behaves exactly like an llvm.dbg.declare but can take non pointer and integer location types. More information here: https://discourse.llvm.org/t/rfc-introduce-new-llvm-dbg-coroframe-entry-intrinsic/88269 This is the first patch as part of a stack of patches, with the one succeeding it being: https://github.com/llvm/llvm-project/pull/168134
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