Unbreak after clang added BFloat16 builtin

In apple/llvm-project 9e7b7cb
(llvm/llvm-project ecd682b), BFloat16
was added to the clang builtins.

Author: davezarzycki

lib/ClangImporter/ClangAdapter.cpp

@@ -377,6 +377,7 @@ OmissionTypeName importer::getClangTypeNameForOmission(clang::ASTContext &ctx,
     case clang::BuiltinType::SatULongFract:
     case clang::BuiltinType::Half:
     case clang::BuiltinType::LongDouble:
+    case clang::BuiltinType::BFloat16:
     case clang::BuiltinType::Float16:
     case clang::BuiltinType::Float128:
     case clang::BuiltinType::NullPtr:

lib/ClangImporter/ImportType.cpp

@@ -274,6 +274,7 @@ namespace {
       case clang::BuiltinType::SatUShortFract:
       case clang::BuiltinType::SatUFract:
       case clang::BuiltinType::SatULongFract:
+      case clang::BuiltinType::BFloat16:
       case clang::BuiltinType::Float128:
       case clang::BuiltinType::NullPtr:
       case clang::BuiltinType::Char8:

lib/IRGen/GenCall.cpp

@@ -917,6 +917,8 @@ namespace {
       case clang::BuiltinType::Float16:
         llvm_unreachable("When upstream support is added for Float16 in "
                          "clang::TargetInfo, use the implementation here");
+      case clang::BuiltinType::BFloat16:
+        return convertFloatingType(Ctx.getTargetInfo().getBFloat16Format());
       case clang::BuiltinType::Float128:
         return convertFloatingType(Ctx.getTargetInfo().getFloat128Format());