1 files changed, 40 insertions, 6 deletions
diff --git a/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp b/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp
index 4eb8ca8..97c0944 100644
--- a/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp
@@ -463,12 +463,6 @@ struct CallObjectDelete final : EHScopeStack::Cleanup {
   void emit(CIRGenFunction &cgf) override {
     cgf.emitDeleteCall(operatorDelete, ptr, elementType);
   }
-
-  // This is a placeholder until EHCleanupScope is implemented.
-  size_t getSize() const override {
-    assert(!cir::MissingFeatures::ehCleanupScope());
-    return sizeof(CallObjectDelete);
-  }
 };
 } // namespace
 
@@ -728,3 +722,43 @@ void CIRGenFunction::emitDeleteCall(const FunctionDecl *deleteFD,
   // Emit the call to delete.
   emitNewDeleteCall(*this, deleteFD, deleteFTy, deleteArgs);
 }
+
+mlir::Value CIRGenFunction::emitDynamicCast(Address thisAddr,
+                                            const CXXDynamicCastExpr *dce) {
+  mlir::Location loc = getLoc(dce->getSourceRange());
+
+  cgm.emitExplicitCastExprType(dce, this);
+  QualType destTy = dce->getTypeAsWritten();
+  QualType srcTy = dce->getSubExpr()->getType();
+
+  // C++ [expr.dynamic.cast]p7:
+  //   If T is "pointer to cv void," then the result is a pointer to the most
+  //   derived object pointed to by v.
+  bool isDynCastToVoid = destTy->isVoidPointerType();
+  bool isRefCast = destTy->isReferenceType();
+
+  QualType srcRecordTy;
+  QualType destRecordTy;
+  if (isDynCastToVoid) {
+    srcRecordTy = srcTy->getPointeeType();
+    // No destRecordTy.
+  } else if (const PointerType *destPTy = destTy->getAs<PointerType>()) {
+    srcRecordTy = srcTy->castAs<PointerType>()->getPointeeType();
+    destRecordTy = destPTy->getPointeeType();
+  } else {
+    srcRecordTy = srcTy;
+    destRecordTy = destTy->castAs<ReferenceType>()->getPointeeType();
+  }
+
+  assert(srcRecordTy->isRecordType() && "source type must be a record type!");
+  assert(!cir::MissingFeatures::emitTypeCheck());
+
+  if (dce->isAlwaysNull()) {
+    cgm.errorNYI(dce->getSourceRange(), "emitDynamicCastToNull");
+    return {};
+  }
+
+  auto destCirTy = mlir::cast<cir::PointerType>(convertType(destTy));
+  return cgm.getCXXABI().emitDynamicCast(*this, loc, srcRecordTy, destRecordTy,
+                                         destCirTy, isRefCast, thisAddr);
+}