[HLSL] Remove old resource annotations (#130338)

Fixes #114126

Author: hekota

clang/lib/CodeGen/CGDeclCXX.cpp

@@ -1071,9 +1071,6 @@ void CodeGenFunction::GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn,
     EmitCXXGlobalVarDeclInit(*D, Addr, PerformInit);
   }
 
-  if (getLangOpts().HLSL)
-    CGM.getHLSLRuntime().annotateHLSLResource(D, Addr);
-
   FinishFunction();
 }
 

clang/lib/CodeGen/CGHLSLRuntime.cpp

@@ -291,135 +291,6 @@ void CGHLSLRuntime::finishCodeGen() {
   generateGlobalCtorDtorCalls();
 }
 
-void CGHLSLRuntime::addBufferResourceAnnotation(llvm::GlobalVariable *GV,
-                                                llvm::hlsl::ResourceClass RC,
-                                                llvm::hlsl::ResourceKind RK,
-                                                bool IsROV,
-                                                llvm::hlsl::ElementType ET,
-                                                BufferResBinding &Binding) {
-  llvm::Module &M = CGM.getModule();
-
-  NamedMDNode *ResourceMD = nullptr;
-  switch (RC) {
-  case llvm::hlsl::ResourceClass::UAV:
-    ResourceMD = M.getOrInsertNamedMetadata("hlsl.uavs");
-    break;
-  case llvm::hlsl::ResourceClass::SRV:
-    ResourceMD = M.getOrInsertNamedMetadata("hlsl.srvs");
-    break;
-  case llvm::hlsl::ResourceClass::CBuffer:
-    ResourceMD = M.getOrInsertNamedMetadata("hlsl.cbufs");
-    break;
-  default:
-    assert(false && "Unsupported buffer type!");
-    return;
-  }
-  assert(ResourceMD != nullptr &&
-         "ResourceMD must have been set by the switch above.");
-
-  llvm::hlsl::FrontendResource Res(
-      GV, RK, ET, IsROV, Binding.Reg.value_or(UINT_MAX), Binding.Space);
-  ResourceMD->addOperand(Res.getMetadata());
-}
-
-static llvm::hlsl::ElementType
-calculateElementType(const ASTContext &Context, const clang::Type *ResourceTy) {
-  using llvm::hlsl::ElementType;
-
-  // TODO: We may need to update this when we add things like ByteAddressBuffer
-  // that don't have a template parameter (or, indeed, an element type).
-  const auto *TST = ResourceTy->getAs<TemplateSpecializationType>();
-  assert(TST && "Resource types must be template specializations");
-  ArrayRef<TemplateArgument> Args = TST->template_arguments();
-  assert(!Args.empty() && "Resource has no element type");
-
-  // At this point we have a resource with an element type, so we can assume
-  // that it's valid or we would have diagnosed the error earlier.
-  QualType ElTy = Args[0].getAsType();
-
-  // We should either have a basic type or a vector of a basic type.
-  if (const auto *VecTy = ElTy->getAs<clang::VectorType>())
-    ElTy = VecTy->getElementType();
-
-  if (ElTy->isSignedIntegerType()) {
-    switch (Context.getTypeSize(ElTy)) {
-    case 16:
-      return ElementType::I16;
-    case 32:
-      return ElementType::I32;
-    case 64:
-      return ElementType::I64;
-    }
-  } else if (ElTy->isUnsignedIntegerType()) {
-    switch (Context.getTypeSize(ElTy)) {
-    case 16:
-      return ElementType::U16;
-    case 32:
-      return ElementType::U32;
-    case 64:
-      return ElementType::U64;
-    }
-  } else if (ElTy->isSpecificBuiltinType(BuiltinType::Half))
-    return ElementType::F16;
-  else if (ElTy->isSpecificBuiltinType(BuiltinType::Float))
-    return ElementType::F32;
-  else if (ElTy->isSpecificBuiltinType(BuiltinType::Double))
-    return ElementType::F64;
-
-  // TODO: We need to handle unorm/snorm float types here once we support them
-  llvm_unreachable("Invalid element type for resource");
-}
-
-void CGHLSLRuntime::annotateHLSLResource(const VarDecl *D, GlobalVariable *GV) {
-  const Type *Ty = D->getType()->getPointeeOrArrayElementType();
-  if (!Ty)
-    return;
-  const auto *RD = Ty->getAsCXXRecordDecl();
-  if (!RD)
-    return;
-  // the resource related attributes are on the handle member
-  // inside the record decl
-  for (auto *FD : RD->fields()) {
-    const auto *HLSLResAttr = FD->getAttr<HLSLResourceAttr>();
-    const HLSLAttributedResourceType *AttrResType =
-        dyn_cast<HLSLAttributedResourceType>(FD->getType().getTypePtr());
-    if (!HLSLResAttr || !AttrResType)
-      continue;
-
-    llvm::hlsl::ResourceClass RC = AttrResType->getAttrs().ResourceClass;
-    if (RC == llvm::hlsl::ResourceClass::UAV ||
-        RC == llvm::hlsl::ResourceClass::SRV)
-      // UAVs and SRVs have already been converted to use LLVM target types,
-      // we can disable generating of these resource annotations. This will
-      // enable progress on structured buffers with user defined types this
-      // resource annotations code does not handle and it crashes.
-      // This whole function is going to be removed as soon as cbuffers are
-      // converted to target types (llvm/llvm-project #114126).
-      return;
-
-    bool IsROV = AttrResType->getAttrs().IsROV;
-    llvm::hlsl::ResourceKind RK = HLSLResAttr->getResourceKind();
-    llvm::hlsl::ElementType ET = calculateElementType(CGM.getContext(), Ty);
-
-    BufferResBinding Binding(D->getAttr<HLSLResourceBindingAttr>());
-    addBufferResourceAnnotation(GV, RC, RK, IsROV, ET, Binding);
-  }
-}
-
-CGHLSLRuntime::BufferResBinding::BufferResBinding(
-    HLSLResourceBindingAttr *Binding) {
-  if (Binding) {
-    llvm::APInt RegInt(64, 0);
-    Binding->getSlot().substr(1).getAsInteger(10, RegInt);
-    Reg = RegInt.getLimitedValue();
-    llvm::APInt SpaceInt(64, 0);
-    Binding->getSpace().substr(5).getAsInteger(10, SpaceInt);
-    Space = SpaceInt.getLimitedValue();
-  } else {
-    Space = 0;
-  }
-}
-
 void clang::CodeGen::CGHLSLRuntime::setHLSLEntryAttributes(
     const FunctionDecl *FD, llvm::Function *Fn) {
   const auto *ShaderAttr = FD->getAttr<HLSLShaderAttr>();

clang/lib/CodeGen/CGHLSLRuntime.h

@@ -125,15 +125,6 @@ class CGHLSLRuntime {
   // End of reserved area for HLSL intrinsic getters.
   //===----------------------------------------------------------------------===//
 
-  struct BufferResBinding {
-    // The ID like 2 in register(b2, space1).
-    std::optional<unsigned> Reg;
-    // The Space like 1 is register(b2, space1).
-    // Default value is 0.
-    unsigned Space;
-    BufferResBinding(HLSLResourceBindingAttr *Attr);
-  };
-
 protected:
   CodeGenModule &CGM;
 
@@ -148,7 +139,6 @@ class CGHLSLRuntime {
   convertHLSLSpecificType(const Type *T,
                           SmallVector<int32_t> *Packoffsets = nullptr);
 
-  void annotateHLSLResource(const VarDecl *D, llvm::GlobalVariable *GV);
   void generateGlobalCtorDtorCalls();
 
   void addBuffer(const HLSLBufferDecl *D);
@@ -169,11 +159,6 @@ class CGHLSLRuntime {
   void emitInitListOpaqueValues(CodeGenFunction &CGF, InitListExpr *E);
 
 private:
-  void addBufferResourceAnnotation(llvm::GlobalVariable *GV,
-                                   llvm::hlsl::ResourceClass RC,
-                                   llvm::hlsl::ResourceKind RK, bool IsROV,
-                                   llvm::hlsl::ElementType ET,
-                                   BufferResBinding &Binding);
   void emitBufferGlobalsAndMetadata(const HLSLBufferDecl *BufDecl,
                                     llvm::GlobalVariable *BufGV);
   llvm::Triple::ArchType getArch();

llvm/include/llvm/Frontend/HLSL/HLSLResource.h

@@ -13,39 +13,17 @@
 #ifndef LLVM_FRONTEND_HLSL_HLSLRESOURCE_H
 #define LLVM_FRONTEND_HLSL_HLSLRESOURCE_H
 
-#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DXILABI.h"
 
 namespace llvm {
-class GlobalVariable;
-class MDNode;
-
 namespace hlsl {
 
 // For now we use DXIL ABI enum values directly. This may change in the future.
 using dxil::ResourceClass;
-using dxil::ElementType;
 using dxil::ResourceKind;
 
 const unsigned CBufferRowSizeInBytes = 16U;
 
-class FrontendResource {
-  MDNode *Entry;
-
-public:
-  FrontendResource(MDNode *E);
-  FrontendResource(GlobalVariable *GV, ResourceKind RK, ElementType ElTy,
-                   bool IsROV, uint32_t ResIndex, uint32_t Space);
-
-  GlobalVariable *getGlobalVariable();
-  StringRef getSourceType();
-  ResourceKind getResourceKind();
-  ElementType getElementType();
-  bool getIsROV();
-  uint32_t getResourceIndex();
-  uint32_t getSpace();
-  MDNode *getMetadata() { return Entry; }
-};
 } // namespace hlsl
 } // namespace llvm
 

llvm/lib/Frontend/HLSL/HLSLResource.cpp

@@ -11,59 +11,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Frontend/HLSL/HLSLResource.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/Metadata.h"
 
 using namespace llvm;
 using namespace llvm::hlsl;
 
-GlobalVariable *FrontendResource::getGlobalVariable() {
-  return cast<GlobalVariable>(
-      cast<ConstantAsMetadata>(Entry->getOperand(0))->getValue());
-}
-
-ResourceKind FrontendResource::getResourceKind() {
-  return static_cast<ResourceKind>(
-      cast<ConstantInt>(
-          cast<ConstantAsMetadata>(Entry->getOperand(1))->getValue())
-          ->getLimitedValue());
-}
-ElementType FrontendResource::getElementType() {
-  return static_cast<ElementType>(
-      cast<ConstantInt>(
-          cast<ConstantAsMetadata>(Entry->getOperand(2))->getValue())
-          ->getLimitedValue());
-}
-bool FrontendResource::getIsROV() {
-  return cast<ConstantInt>(
-             cast<ConstantAsMetadata>(Entry->getOperand(3))->getValue())
-      ->getLimitedValue();
-}
-uint32_t FrontendResource::getResourceIndex() {
-  return cast<ConstantInt>(
-             cast<ConstantAsMetadata>(Entry->getOperand(4))->getValue())
-      ->getLimitedValue();
-}
-uint32_t FrontendResource::getSpace() {
-  return cast<ConstantInt>(
-             cast<ConstantAsMetadata>(Entry->getOperand(5))->getValue())
-      ->getLimitedValue();
-}
-
-FrontendResource::FrontendResource(MDNode *E) : Entry(E) {
-  assert(Entry->getNumOperands() == 6 && "Unexpected metadata shape");
-}
-
-FrontendResource::FrontendResource(GlobalVariable *GV, ResourceKind RK,
-                                   ElementType ElTy, bool IsROV,
-                                   uint32_t ResIndex, uint32_t Space) {
-  auto &Ctx = GV->getContext();
-  IRBuilder<> B(Ctx);
-  Entry = MDNode::get(
-      Ctx, {ValueAsMetadata::get(GV),
-            ConstantAsMetadata::get(B.getInt32(static_cast<int>(RK))),
-            ConstantAsMetadata::get(B.getInt32(static_cast<int>(ElTy))),
-            ConstantAsMetadata::get(B.getInt1(IsROV)),
-            ConstantAsMetadata::get(B.getInt32(ResIndex)),
-            ConstantAsMetadata::get(B.getInt32(Space))});
-}
+// Intentionally empty; this file can be removed when more cpp files are added
+// to the HLSLFrontend lib.