[llvm] [OpenMP] Add ATTACH map-type to OMPConstants.h, to align with omptarget.h. (PR #161791)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-flang-openmp

Author: Abhinav Gaba (abhinavgaba)

<details>
<summary>Changes</summary>

The clang changes that use this map-type are in #<!-- -->153683.

---
Full diff: https://github.com/llvm/llvm-project/pull/161791.diff


1 Files Affected:

- (modified) llvm/include/llvm/Frontend/OpenMP/OMPConstants.h (+3) 


``````````diff
diff --git a/llvm/include/llvm/Frontend/OpenMP/OMPConstants.h b/llvm/include/llvm/Frontend/OpenMP/OMPConstants.h
index 6e1bce12af8e4..7bec7e0c6736d 100644
--- a/llvm/include/llvm/Frontend/OpenMP/OMPConstants.h
+++ b/llvm/include/llvm/Frontend/OpenMP/OMPConstants.h
@@ -239,6 +239,9 @@ enum class OpenMPOffloadMappingFlags : uint64_t {
   // dynamic.
   // This is an OpenMP extension for the sake of OpenACC support.
   OMP_MAP_OMPX_HOLD = 0x2000,
+  // Attach pointer and pointee, after processing all other maps.
+  // Applicable to map-entering directives. Does not change ref-count.
+  OMP_MAP_ATTACH = 0x4000,
   /// Signal that the runtime library should use args as an array of
   /// descriptor_dim pointers and use args_size as dims. Used when we have
   /// non-contiguous list items in target update directive

``````````

</details>


https://github.com/llvm/llvm-project/pull/161791