[llvm] [Offload]: Skip copying of unused kernel-mapped data (PR #124723)

[via llvm-commits]

================
@@ -1197,6 +1197,35 @@ class PrivateArgumentManagerTy {
   }
 };
 
+static std::unique_ptr<int64_t[]> maskIgnorableMappings(int64_t DeviceId, int32_t ArgNum, int64_t *ArgTypes,
+                                                        int64_t *ArgSizes, map_var_info_t *ArgNames) {
+    std::unique_ptr<int64_t[]> ArgTypesOverride = std::make_unique<int64_t[]>(ArgNum);
----------------
pradt2 wrote:

I get a segfault when I do, I think this is because the pointer points straight to a region of read-only memory.

https://github.com/llvm/llvm-project/pull/124723