[clang] [clang] Add `__bf16` Type Support Macros With Literal Suffix Support (PR #134214)

[via cfe-commits]

================
@@ -978,6 +979,24 @@ NumericLiteralParser::NumericLiteralParser(StringRef 
TokSpelling,
   // we break out of the loop.
   for (; s != ThisTokEnd; ++s) {
     switch (*s) {
+    case 'b': // FP Suffix for "__bf16"
+    case 'B':
+      if (!Target.hasBFloat16Type())
+        break;
+      if (!isFPConstant)
+        break; // Error for integer constant.
+      if (HasSize)
+        break;
+      HasSize = true;
+
+      if ((Target.hasBFloat16Type()) && s + 3 < ThisTokEnd &&
----------------
overmighty wrote:

We already have `if (!Target.hasBFloat16Type()) break;` above.

```suggestion
```

https://github.com/llvm/llvm-project/pull/134214
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