[clang] [HLSL] Apply resource attributes to the resource type rather than the handle member (PR #107160)

[Justin Bogner via cfe-commits]

================
@@ -559,46 +563,123 @@ void SemaHLSL::handleShaderAttr(Decl *D, const 
ParsedAttr &AL) {
     D->addAttr(NewAttr);
 }
 
-void SemaHLSL::handleResourceClassAttr(Decl *D, const ParsedAttr &AL) {
-  if (!AL.isArgIdent(0)) {
-    Diag(AL.getLoc(), diag::err_attribute_argument_type)
-        << AL << AANT_ArgumentIdentifier;
-    return;
-  }
+bool clang::CreateHLSLAttributedResourceType(Sema &S, QualType Wrapped,
+                                             ArrayRef<const Attr *> AttrList,
+                                             QualType &ResType) {
+  assert(AttrList.size() && "expected list of resource attributes");
 
-  IdentifierLoc *Loc = AL.getArgAsIdent(0);
-  StringRef Identifier = Loc->Ident->getName();
-  SourceLocation ArgLoc = Loc->Loc;
+  QualType Contained = QualType();
+  HLSLAttributedResourceType::Attributes ResAttrs = {};
 
-  // Validate.
-  llvm::dxil::ResourceClass RC;
-  if (!HLSLResourceClassAttr::ConvertStrToResourceClass(Identifier, RC)) {
-    Diag(ArgLoc, diag::warn_attribute_type_not_supported)
-        << "ResourceClass" << Identifier;
-    return;
+  bool HasResourceClass = false;
+  for (const Attr *A : AttrList) {
+    if (!A)
+      continue;
+    switch (A->getKind()) {
+    case attr::HLSLResourceClass: {
+      llvm::dxil::ResourceClass RC =
+          dyn_cast<HLSLResourceClassAttr>(A)->getResourceClass();
----------------
bogner wrote:

This should use `cast` rather than `dyn_cast`, since you know it has to be 
correct. Generally `dyn_cast` should always be proceeded by a null check.

```suggestion
      llvm::dxil::ResourceClass RC =
          cast<HLSLResourceClassAttr>(A)->getResourceClass();
```

https://github.com/llvm/llvm-project/pull/107160
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