[clang] [CIR] vTableClassNameForType: return correct VTableClass name for Type::ObjCObjectPointer, Type::Pointer (PR #163850)

[via cfe-commits]

https://github.com/n2h9 updated https://github.com/llvm/llvm-project/pull/163850

>From d637988bd2d4252fe5fe635a54b1fb4de17197d2 Mon Sep 17 00:00:00 2001
From: Nikita B <n2h9z4 at gmail.com>
Date: Thu, 16 Oct 2025 21:12:14 +0200
Subject: [PATCH 1/2] [CIR] vTableClassNameForType: return correct VTableClass
 name for Type::ObjCObjectPointer, Type::Pointer

Signed-off-by: Nikita B <n2h9z4 at gmail.com>
---
 clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp b/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
index 1b85a530cbdd7..9494faa5ddfc7 100644
--- a/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
@@ -978,8 +978,7 @@ const char *vTableClassNameForType(const CIRGenModule &cgm, const Type *ty) {
 
   case Type::ObjCObjectPointer:
   case Type::Pointer:
-    cgm.errorNYI("VTableClassNameForType: __pointer_type_info");
-    break;
+    return "_ZTVN10__cxxabiv119__pointer_type_infoE";
 
   case Type::MemberPointer:
     cgm.errorNYI("VTableClassNameForType: __pointer_to_member_type_info");

>From c08ef2e7db5e79f0bb7e5d761d256c4e970568ea Mon Sep 17 00:00:00 2001
From: Nikita B <n2h9z4 at gmail.com>
Date: Sat, 18 Oct 2025 13:15:23 +0200
Subject: [PATCH 2/2] [CIR] vTableClassNameForType: add throw test for
 Type::Pointer

Signed-off-by: Nikita B <n2h9z4 at gmail.com>
---
 clang/test/CIR/CodeGen/throws.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/clang/test/CIR/CodeGen/throws.cpp b/clang/test/CIR/CodeGen/throws.cpp
index 89cb0729c636c..6f2d136b4c6fd 100644
--- a/clang/test/CIR/CodeGen/throws.cpp
+++ b/clang/test/CIR/CodeGen/throws.cpp
@@ -196,3 +196,32 @@ void throw_ext_vector_type() {
 // OGCG: store <4 x i32> %[[TMP_A]], ptr %[[EXCEPTION_ADDR]], align 16
 // OGCG: call void @__cxa_throw(ptr %[[EXCEPTION_ADDR]], ptr @_ZTIDv4_i, ptr null)
 // OGCG: unreachable
+
+void throw_pointer_type() {
+  static int var = 42;
+  int *ptr = &var;
+  throw ptr;
+}
+
+// CIR: %[[PTR_ADDR:.*]] = cir.alloca !cir.ptr<!s32i>, !cir.ptr<!cir.ptr<!s32i>>, ["ptr", init]
+// CIR: %[[VAR_ADDR:.*]] = cir.get_global @_ZZ18throw_pointer_typevE3var : !cir.ptr<!s32i>
+// CIR: cir.store{{.*}} %[[VAR_ADDR]], %[[PTR_ADDR]] : !cir.ptr<!s32i>, !cir.ptr<!cir.ptr<!s32i>>
+// CIR: %[[EXCEPTION_ADDR:.*]] = cir.alloc.exception 8 -> !cir.ptr<!cir.ptr<!s32i>>
+// CIR: %[[TMP_PTR:.*]] = cir.load{{.*}} %[[PTR_ADDR]] : !cir.ptr<!cir.ptr<!s32i>>, !cir.ptr<!s32i>
+// CIR: cir.store{{.*}} %[[TMP_PTR]], %[[EXCEPTION_ADDR]] : !cir.ptr<!s32i>, !cir.ptr<!cir.ptr<!s32i>>
+// CIR: cir.throw %[[EXCEPTION_ADDR]] : !cir.ptr<!cir.ptr<!s32i>>, @_ZTIPi
+// CIR: cir.unreachable
+
+// LLVM: %[[PTR_ADDR:.*]] = alloca ptr,{{.*}} align 8
+// LLVM: store ptr @_ZZ18throw_pointer_typevE3var, ptr %[[PTR_ADDR]], align 8
+// LLVM: %[[EXCEPTION_ADDR:.*]] = call ptr @__cxa_allocate_exception(i64 8)
+// LLVM: %[[TMP_PTR:.*]] = load ptr, ptr %[[PTR_ADDR]], align 8
+// LLVM: store ptr %[[TMP_PTR]], ptr %[[EXCEPTION_ADDR]], align 16
+// LLVM: call void @__cxa_throw(ptr %[[EXCEPTION_ADDR]], ptr @_ZTIPi, ptr null)
+
+// OGCG: %[[PTR_ADDR:.*]] = alloca ptr, align 8
+// OGCG: store ptr @_ZZ18throw_pointer_typevE3var, ptr %[[PTR_ADDR]], align 8
+// OGCG: %[[EXCEPTION_ADDR:.*]] = call ptr @__cxa_allocate_exception(i64 8)
+// OGCG: %[[TMP_PTR:.*]] = load ptr, ptr %[[PTR_ADDR]], align 8
+// OGCG: store ptr %[[TMP_PTR]], ptr %[[EXCEPTION_ADDR]], align 16
+// OGCG: call void @__cxa_throw(ptr %[[EXCEPTION_ADDR]], ptr @_ZTIPi, ptr null)