[clang] [Clang][OpenMP] Handle check for pointer-based array sections (PR #157443)

[Amit Tiwari via cfe-commits]

https://github.com/amitamd7 created https://github.com/llvm/llvm-project/pull/157443

This patch adds the check where pointer-based array sections are not considered while deducing `ElementType` of the array items.  

>From 57bd313653a208eefbd5d349704ea984f499d08a Mon Sep 17 00:00:00 2001
From: amtiwari <amtiwari at amd.com>
Date: Mon, 8 Sep 2025 08:23:21 -0400
Subject: [PATCH] handle_array_pointer_var_check

---
 clang/lib/CodeGen/CGOpenMPRuntime.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
index b38eb54036e60..416a8c1ad4a03 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -7930,10 +7930,12 @@ class MappableExprsHandler {
           ElementType = CAT->getElementType().getTypePtr();
         else if (VAT)
           ElementType = VAT->getElementType().getTypePtr();
-        else
-          assert(&Component == &*Components.begin() &&
-                 "Only expect pointer (non CAT or VAT) when this is the "
-                 "first Component");
+        else if (&Component == &*Components.begin()) {
+          // Handle pointer-based array sections like data[a:b:c]
+          if (const auto *PtrType = Ty->getAs<PointerType>()) {
+            ElementType = PtrType->getPointeeType().getTypePtr();
+          }
+        }
         // If ElementType is null, then it means the base is a pointer
         // (neither CAT nor VAT) and we'll attempt to get ElementType again
         // for next iteration.