[clang] [WIP][Clang] Allow floating point fixed vectors with atomic builtins (PR #129495)

[Vikram Hegde via cfe-commits]

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@@ -2312,6 +2312,17 @@ bool Type::isRealType() const {
   return isBitIntType();
 }
 
+bool Type::isFPAtomicCompatibleType() const {
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vikramRH wrote:

not sure if this is the right place for the predicate, ASTContext seemed like a good option too

https://github.com/llvm/llvm-project/pull/129495