[clang] [CIR] Handle Type::OverflowBehavior in CIRGenItaniumCXXABI (PR #182469)

[via cfe-commits]

https://github.com/skc7 updated https://github.com/llvm/llvm-project/pull/182469

>From e59bdae490c40e9d915aca885601d6efb756f758 Mon Sep 17 00:00:00 2001
From: skc7 <Krishna.Sankisa at amd.com>
Date: Fri, 20 Feb 2026 15:58:34 +0530
Subject: [PATCH] [CIR] Handle Type::OverflowBehavior in CIR CodeGen

Add handling for the newly introduced Type::OverflowBehavior type class
in CIRGenItaniumCXXABI.cpp and CIRGenFunction.cpp switch statements to
fix -Werror,-Wswitch compilation errors.
---
 clang/lib/CIR/CodeGen/CIRGenFunction.cpp      | 2 ++
 clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/clang/lib/CIR/CodeGen/CIRGenFunction.cpp b/clang/lib/CIR/CodeGen/CIRGenFunction.cpp
index f8f674c4d2c21..71f3368cca3bb 100644
--- a/clang/lib/CIR/CodeGen/CIRGenFunction.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenFunction.cpp
@@ -67,6 +67,7 @@ cir::TypeEvaluationKind CIRGenFunction::getEvaluationKind(QualType type) {
     case Type::ObjCObjectPointer:
     case Type::Pipe:
     case Type::BitInt:
+    case Type::OverflowBehavior:
     case Type::HLSLAttributedResource:
     case Type::HLSLInlineSpirv:
       return cir::TEK_Scalar;
@@ -1372,6 +1373,7 @@ void CIRGenFunction::emitVariablyModifiedType(QualType type) {
     case Type::ObjCInterface:
     case Type::ObjCObjectPointer:
     case Type::BitInt:
+    case Type::OverflowBehavior:
       llvm_unreachable("type class is never variably-modified!");
 
     case Type::Adjusted:
diff --git a/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp b/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
index aca2278c3876c..a4fdf8b33216b 100644
--- a/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenItaniumCXXABI.cpp
@@ -960,6 +960,7 @@ const char *vTableClassNameForType(const CIRGenModule &cgm, const Type *ty) {
 
   case Type::Builtin:
   case Type::BitInt:
+  case Type::OverflowBehavior:
   // GCC treats vector and complex types as fundamental types.
   case Type::Vector:
   case Type::ExtVector:
@@ -1388,6 +1389,9 @@ mlir::Attribute CIRGenItaniumRTTIBuilder::buildTypeInfo(
   case Type::BitInt:
     break;
 
+  case Type::OverflowBehavior:
+    break;
+
   case Type::ConstantArray:
   case Type::IncompleteArray:
   case Type::VariableArray: