[CIR} Add support for static member variable instantiation (#153200)

This patch handles both implicit and explicit template instantiations of
template class static member variables.

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/lib/CIR/CodeGen/CIRGenModule.cpp b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
index 45dfcf5..d529688 100644
--- a/clang/lib/CIR/CodeGen/CIRGenModule.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
@@ -438,6 +438,20 @@ void CIRGenModule::emitGlobalFunctionDefinition(clang::GlobalDecl gd,
     errorNYI(funcDecl->getSourceRange(), "deferredAnnotations");
 }
 
+void CIRGenModule::handleCXXStaticMemberVarInstantiation(VarDecl *vd) {
+  VarDecl::DefinitionKind dk = vd->isThisDeclarationADefinition();
+  if (dk == VarDecl::Definition && vd->hasAttr<DLLImportAttr>())
+    return;
+
+  TemplateSpecializationKind tsk = vd->getTemplateSpecializationKind();
+  // If we have a definition, this might be a deferred decl. If the
+  // instantiation is explicit, make sure we emit it at the end.
+  if (vd->getDefinition() && tsk == TSK_ExplicitInstantiationDefinition)
+    getAddrOfGlobalVar(vd);
+
+  emitTopLevelDecl(vd);
+}
+
 mlir::Operation *CIRGenModule::getGlobalValue(StringRef name) {
   return mlir::SymbolTable::lookupSymbolIn(theModule, name);
 }