[clang] [HLSL] Add `isHLSLResourceRecordArray` method to `clang::Type` (PR #152450)

[Helena Kotas via cfe-commits]

https://github.com/hekota created https://github.com/llvm/llvm-project/pull/152450

None

>From 10a06e36e875cbc0259d0d95700e5c4ec9721f1a Mon Sep 17 00:00:00 2001
From: Helena Kotas <hekotas at microsoft.com>
Date: Thu, 7 Aug 2025 00:03:37 -0700
Subject: [PATCH] [HLSL] Add `isHLSLResourceRecordArray` method to
 `clang::Type`

---
 clang/include/clang/AST/Type.h      |  1 +
 clang/lib/AST/Type.cpp              |  9 +++++++++
 clang/lib/CodeGen/CGHLSLRuntime.cpp |  9 +--------
 clang/lib/Sema/SemaHLSL.cpp         | 15 ++++-----------
 4 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/clang/include/clang/AST/Type.h b/clang/include/clang/AST/Type.h
index 12dce309127e5..dfcf075e73312 100644
--- a/clang/include/clang/AST/Type.h
+++ b/clang/include/clang/AST/Type.h
@@ -2724,6 +2724,7 @@ class alignas(TypeAlignment) Type : public ExtQualsTypeCommonBase {
   bool isHLSLAttributedResourceType() const;
   bool isHLSLInlineSpirvType() const;
   bool isHLSLResourceRecord() const;
+  bool isHLSLResourceRecordArray() const;
   bool isHLSLIntangibleType()
       const; // Any HLSL intangible type (builtin, array, class)
 
diff --git a/clang/lib/AST/Type.cpp b/clang/lib/AST/Type.cpp
index 141edc881d683..03d7413cf95b4 100644
--- a/clang/lib/AST/Type.cpp
+++ b/clang/lib/AST/Type.cpp
@@ -5246,6 +5246,15 @@ bool Type::isHLSLResourceRecord() const {
   return HLSLAttributedResourceType::findHandleTypeOnResource(this) != nullptr;
 }
 
+bool Type::isHLSLResourceRecordArray() const {
+  const Type *Ty = getUnqualifiedDesugaredType();
+  if (!Ty->isArrayType())
+    return false;
+  while (isa<ConstantArrayType>(Ty))
+    Ty = Ty->getArrayElementTypeNoTypeQual();
+  return Ty->isHLSLResourceRecord();
+}
+
 bool Type::isHLSLIntangibleType() const {
   const Type *Ty = getUnqualifiedDesugaredType();
 
diff --git a/clang/lib/CodeGen/CGHLSLRuntime.cpp b/clang/lib/CodeGen/CGHLSLRuntime.cpp
index f64ac20545fa3..918cb3e38448d 100644
--- a/clang/lib/CodeGen/CGHLSLRuntime.cpp
+++ b/clang/lib/CodeGen/CGHLSLRuntime.cpp
@@ -103,13 +103,6 @@ llvm::Triple::ArchType CGHLSLRuntime::getArch() {
   return CGM.getTarget().getTriple().getArch();
 }
 
-// Returns true if the type is an HLSL resource class or an array of them
-static bool isResourceRecordTypeOrArrayOf(const clang::Type *Ty) {
-  while (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
-    Ty = CAT->getArrayElementTypeNoTypeQual();
-  return Ty->isHLSLResourceRecord();
-}
-
 // Emits constant global variables for buffer constants declarations
 // and creates metadata linking the constant globals with the buffer global.
 void CGHLSLRuntime::emitBufferGlobalsAndMetadata(const HLSLBufferDecl *BufDecl,
@@ -146,7 +139,7 @@ void CGHLSLRuntime::emitBufferGlobalsAndMetadata(const HLSLBufferDecl *BufDecl,
     if (VDTy.getAddressSpace() != LangAS::hlsl_constant) {
       if (VD->getStorageClass() == SC_Static ||
           VDTy.getAddressSpace() == LangAS::hlsl_groupshared ||
-          isResourceRecordTypeOrArrayOf(VDTy.getTypePtr())) {
+          VDTy->isHLSLResourceRecord() || VDTy->isHLSLResourceRecordArray()) {
         // Emit static and groupshared variables and resource classes inside
         // cbuffer as regular globals
         CGM.EmitGlobal(VD);
diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
index 8536e04a129ee..873efdae38f18 100644
--- a/clang/lib/Sema/SemaHLSL.cpp
+++ b/clang/lib/Sema/SemaHLSL.cpp
@@ -337,16 +337,9 @@ static bool isZeroSizedArray(const ConstantArrayType *CAT) {
   return CAT != nullptr;
 }
 
-// Returns true if the record type is an HLSL resource class or an array of
-// resource classes
-static bool isResourceRecordTypeOrArrayOf(const Type *Ty) {
-  while (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
-    Ty = CAT->getArrayElementTypeNoTypeQual();
-  return HLSLAttributedResourceType::findHandleTypeOnResource(Ty) != nullptr;
-}
-
 static bool isResourceRecordTypeOrArrayOf(VarDecl *VD) {
-  return isResourceRecordTypeOrArrayOf(VD->getType().getTypePtr());
+  const Type *Ty = VD->getType().getTypePtr();
+  return Ty->isHLSLResourceRecord() || Ty->isHLSLResourceRecordArray();
 }
 
 // Returns true if the type is a leaf element type that is not valid to be
@@ -355,7 +348,7 @@ static bool isResourceRecordTypeOrArrayOf(VarDecl *VD) {
 // type or if it is a record type that needs to be inspected further.
 static bool isInvalidConstantBufferLeafElementType(const Type *Ty) {
   Ty = Ty->getUnqualifiedDesugaredType();
-  if (isResourceRecordTypeOrArrayOf(Ty))
+  if (Ty->isHLSLResourceRecord() || Ty->isHLSLResourceRecordArray())
     return true;
   if (Ty->isRecordType())
     return Ty->getAsCXXRecordDecl()->isEmpty();
@@ -3597,7 +3590,7 @@ void SemaHLSL::deduceAddressSpace(VarDecl *Decl) {
     return;
 
   // Resource handles.
-  if (isResourceRecordTypeOrArrayOf(Type->getUnqualifiedDesugaredType()))
+  if (Type->isHLSLResourceRecord() || Type->isHLSLResourceRecordArray())
     return;
 
   // Only static globals belong to the Private address space.