[llvm] [Object][GOFF] Recognize RLD and LEN records (PR #207118)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-binary-utilities

Author: Amy Kwan (amy-kwan)

<details>
<summary>Changes</summary>

This patch adds explicit cases for RT_RLD and RT_LEN records when parsing GOFF objects. These record types are not handled yet, but recognizing them allows us to diagnose them and avoids teating them as unexpected records.

---
Full diff: https://github.com/llvm/llvm-project/pull/207118.diff


1 Files Affected:

- (modified) llvm/lib/Object/GOFFObjectFile.cpp (+6) 


``````````diff
diff --git a/llvm/lib/Object/GOFFObjectFile.cpp b/llvm/lib/Object/GOFFObjectFile.cpp
index 4ee51a61c14fa..813ead330b4e0 100644
--- a/llvm/lib/Object/GOFFObjectFile.cpp
+++ b/llvm/lib/Object/GOFFObjectFile.cpp
@@ -170,6 +170,12 @@ GOFFObjectFile::GOFFObjectFile(MemoryBufferRef Object, Error &Err)
       TextPtrs.emplace_back(I);
       LLVM_DEBUG(dbgs() << "  --  TXT\n");
       break;
+    case GOFF::RT_RLD:
+      LLVM_DEBUG(dbgs() << "  --  RLD (GOFF record type) unhandled\n");
+      break;
+    case GOFF::RT_LEN:
+      LLVM_DEBUG(dbgs() << "  --  LEN (GOFF record type) unhandled\n");
+      break;
     case GOFF::RT_END:
       LLVM_DEBUG(dbgs() << "  --  END (GOFF record type) unhandled\n");
       break;

``````````

</details>


https://github.com/llvm/llvm-project/pull/207118