llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clangir

Author: Andy Kaylor (andykaylor)

<details>
<summary>Changes</summary>

This adds explicit case statements for Decl types that weren't explicitly 
present in the emitDecl function. Those that need no handling are just 
accepted. Those that will need handling still go to errorNYI, but the default 
statement is removed.

---
Full diff: https://github.com/llvm/llvm-project/pull/138319.diff


1 Files Affected:

- (modified) clang/lib/CIR/CodeGen/CIRGenDecl.cpp (+84-2) 


``````````diff
diff --git a/clang/lib/CIR/CodeGen/CIRGenDecl.cpp 
b/clang/lib/CIR/CodeGen/CIRGenDecl.cpp
index 90498cd18f46b..498d7533c2204 100644
--- a/clang/lib/CIR/CodeGen/CIRGenDecl.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenDecl.cpp
@@ -268,11 +268,87 @@ void CIRGenFunction::emitExprAsInit(const Expr *init, 
const ValueDecl *d,
 
 void CIRGenFunction::emitDecl(const Decl &d) {
   switch (d.getKind()) {
-  case Decl::LinkageSpec:
+  case Decl::BuiltinTemplate:
+  case Decl::TranslationUnit:
+  case Decl::ExternCContext:
   case Decl::Namespace:
+  case Decl::UnresolvedUsingTypename:
+  case Decl::ClassTemplateSpecialization:
+  case Decl::ClassTemplatePartialSpecialization:
+  case Decl::VarTemplateSpecialization:
+  case Decl::VarTemplatePartialSpecialization:
+  case Decl::TemplateTypeParm:
+  case Decl::UnresolvedUsingValue:
+  case Decl::NonTypeTemplateParm:
+  case Decl::CXXDeductionGuide:
+  case Decl::CXXMethod:
+  case Decl::CXXConstructor:
+  case Decl::CXXDestructor:
+  case Decl::CXXConversion:
+  case Decl::Field:
+  case Decl::MSProperty:
+  case Decl::IndirectField:
+  case Decl::ObjCIvar:
+  case Decl::ObjCAtDefsField:
+  case Decl::ParmVar:
+  case Decl::ImplicitParam:
+  case Decl::ClassTemplate:
+  case Decl::VarTemplate:
+  case Decl::FunctionTemplate:
+  case Decl::TypeAliasTemplate:
+  case Decl::TemplateTemplateParm:
+  case Decl::ObjCMethod:
+  case Decl::ObjCCategory:
+  case Decl::ObjCProtocol:
+  case Decl::ObjCInterface:
+  case Decl::ObjCCategoryImpl:
+  case Decl::ObjCImplementation:
+  case Decl::ObjCProperty:
+  case Decl::ObjCCompatibleAlias:
+  case Decl::PragmaComment:
+  case Decl::PragmaDetectMismatch:
+  case Decl::AccessSpec:
+  case Decl::LinkageSpec:
+  case Decl::Export:
+  case Decl::ObjCPropertyImpl:
+  case Decl::FileScopeAsm:
+  case Decl::Friend:
+  case Decl::FriendTemplate:
+  case Decl::Block:
+  case Decl::OutlinedFunction:
+  case Decl::Captured:
+  case Decl::UsingShadow:
+  case Decl::ConstructorUsingShadow:
+  case Decl::ObjCTypeParam:
+  case Decl::Binding:
+  case Decl::UnresolvedUsingIfExists:
     llvm_unreachable("Declaration should not be in declstmts!");
 
+  case Decl::Function:     // void X();
+  case Decl::EnumConstant: // enum ? { X = ? }
+  case Decl::StaticAssert: // static_assert(X, ""); [C++0x]
+  case Decl::Label:        // __label__ x;
+  case Decl::Import:
+  case Decl::MSGuid: // __declspec(uuid("..."))
+  case Decl::TemplateParamObject:
+  case Decl::OMPThreadPrivate:
+  case Decl::OMPAllocate:
+  case Decl::OMPCapturedExpr:
+  case Decl::OMPRequires:
+  case Decl::Empty:
+  case Decl::Concept:
+  case Decl::LifetimeExtendedTemporary:
+  case Decl::RequiresExprBody:
+  case Decl::UnnamedGlobalConstant:
+    // None of these decls require codegen support.
+    return;
+
+  case Decl::Enum:   // enum X;
   case Decl::Record: // struct/union/class X;
+  case Decl::CXXRecord: // struct/union/class X; [C++]
+  case Decl::NamespaceAlias:
+  case Decl::Using:          // using X; [C++]
+  case Decl::UsingEnum:      // using enum X; [C++]
   case Decl::UsingDirective: // using namespace X; [C++]
     assert(!cir::MissingFeatures::generateDebugInfo());
     return;
@@ -297,7 +373,13 @@ void CIRGenFunction::emitDecl(const Decl &d) {
       cgm.errorNYI(d.getSourceRange(), "emitDecl: variably modified type");
     return;
   }
-  default:
+  case Decl::ImplicitConceptSpecialization:
+  case Decl::HLSLBuffer:
+  case Decl::TopLevelStmt:
+  case Decl::UsingPack:
+  case Decl::Decomposition: // This could be moved to join Decl::Var
+  case Decl::OMPDeclareReduction:
+  case Decl::OMPDeclareMapper:
     cgm.errorNYI(d.getSourceRange(),
                  std::string("emitDecl: unhandled decl type: ") +
                      d.getDeclKindName());

``````````

</details>


https://github.com/llvm/llvm-project/pull/138319
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