[clang] Implement resource binding type prefix mismatch errors (PR #87578)

[Justin Bogner via cfe-commits]

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@@ -7367,8 +7367,72 @@ static void handleHLSLResourceBindingAttr(Sema &S, Decl *D,
     return;
   }
 
-  // FIXME: check reg type match decl. Issue
-  // https://github.com/llvm/llvm-project/issues/57886.
+  VarDecl *VD = dyn_cast<VarDecl>(D);
+  HLSLBufferDecl *BD = dyn_cast<HLSLBufferDecl>(D);
+
+  if (VD || BD) {
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bogner wrote:

It's probably worth breaking this logic out into a separate `checkHLSLResourceRegType` function. This would improve the readability and we can avoid some indentation by using early returns.

https://github.com/llvm/llvm-project/pull/87578