diff --git a/tools/build/depend-cleanup.sh b/tools/build/depend-cleanup.sh
--- a/tools/build/depend-cleanup.sh
+++ b/tools/build/depend-cleanup.sh
@@ -215,3 +215,13 @@
 		fi
 	done
 fi
+
+# 20241018  5deeebd8c6ca   Merge llvm-project release/19.x llvmorg-19.1.2-0-g7ba7d8e2f7b6
+p="$OBJTOP"/lib/clang/libclang/clang/Basic
+f="$p"/arm_mve_builtin_sema.inc
+if [ -e "$f" ]; then
+	if grep -q SemaBuiltinConstantArgRange "$f"; then
+		echo "Removing pre-llvm19 clang-tblgen output"
+		run rm -f "$p"/*.inc
+	fi
+fi