[llvm] Add support for DFP IR type. (PR #69718)

[Zahira Ammarguellat via llvm-commits]

================
@@ -207,9 +216,15 @@ int Type::getFPMantissaWidth() const {
   if (getTypeID() == HalfTyID) return 11;
   if (getTypeID() == BFloatTyID) return 8;
   if (getTypeID() == FloatTyID) return 24;
+  // TODO - Does this depend on the encoding format used (BID or DPD)?
----------------
zahiraam wrote:

I just added the DFP into the assert. Not quite sure what you mean by "give them an explicit check".

https://github.com/llvm/llvm-project/pull/69718