[clang] [Sema] Add check for bitfield assignments to larger integral types (PR #68276)

[via cfe-commits]

================
@@ -6171,6 +6171,11 @@ def warn_signed_bitfield_enum_conversion : Warning<
   "signed bit-field %0 needs an extra bit to represent the largest positive "
   "enumerators of %1">,
   InGroup<BitFieldEnumConversion>, DefaultIgnore;
+def warn_bitfield_too_small_for_integral_type : Warning<
+  "conversion from %2 (%3 bits) to bit-field %0 (%1 bits) may change value">,
+  InGroup<BitFieldConversion>, DefaultIgnore;
+def note_bitfield_assign : Note<
+  "Bit-field %0 (%1 bits) is too narrow to store assigned value %2 (%3 bits)">;
----------------
vabridgers wrote:

I believe the comments have been resolved. Please let me know if there's anything else to do here. Thank you!

https://github.com/llvm/llvm-project/pull/68276