Allow bfloat16 functions in ESIMD verifier.

Author: kbobrovs

llvm/lib/SYCLLowerIR/ESIMD/ESIMDVerifier.cpp

@@ -49,7 +49,8 @@ static const char *LegalSYCLFunctions[] = {
     "^sycl::_V1::operator.+<.+>",
     "^sycl::_V1::ext::oneapi::sub_group::.+",
     "^sycl::_V1::ext::oneapi::experimental::spec_constant<.+>::.+",
-    "^sycl::_V1::ext::oneapi::experimental::this_sub_group"};
+    "^sycl::_V1::ext::oneapi::experimental::this_sub_group",
+    "^sycl::_V1::ext::oneapi::experimental::bfloat16::.+"};
 
 static const char *LegalSYCLFunctionsInStatelessMode[] = {
     "^sycl::_V1::multi_ptr<.+>::get",