[clang] fix armv6kz LDREX definition (PR #122965)

[via cfe-commits]

https://github.com/Un1q32 created https://github.com/llvm/llvm-project/pull/122965

Fixes #37901

This behavior is consistent with GCC

>From 70a8a728992e858aa5bc283616f826a778de4b88 Mon Sep 17 00:00:00 2001
From: Un1q32 <joey.t.reinhart at gmail.com>
Date: Tue, 14 Jan 2025 15:08:45 -0500
Subject: [PATCH] fix armv6kz LDREX definition

---
 clang/lib/Basic/Targets/ARM.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp
index 61ee26d8863832..0fd5433a76402e 100644
--- a/clang/lib/Basic/Targets/ARM.cpp
+++ b/clang/lib/Basic/Targets/ARM.cpp
@@ -617,7 +617,8 @@ bool ARMTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
   case 6:
     if (ArchProfile == llvm::ARM::ProfileKind::M)
       LDREX = 0;
-    else if (ArchKind == llvm::ARM::ArchKind::ARMV6K)
+    else if (ArchKind == llvm::ARM::ArchKind::ARMV6K ||
+             ArchKind == llvm::ARM::ArchKind::ARMV6KZ)
       LDREX = LDREX_D | LDREX_W | LDREX_H | LDREX_B;
     else
       LDREX = LDREX_W;