[llvm] [XCOFF][OBJECT] get symbol size by calling XCOFF interfaces (PR #67304)

[Chen Zheng via llvm-commits]

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@@ -822,11 +833,29 @@ class XCOFFSymbolRef {
   Expected<XCOFFCsectAuxRef> getXCOFFCsectAuxRef() const;
 
 private:
-  const XCOFFObjectFile *OwningObjectPtr;
+  const XCOFFObjectFile *getObject() const {
+    return cast<XCOFFObjectFile>(BasicSymbolRef::getObject());
+  }
+
   const XCOFFSymbolEntry32 *Entry32 = nullptr;
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chenzheng1030 wrote:

Thanks @diggerlin , you are right. I've changed the patch accordingly. Could you please have another look?

https://github.com/llvm/llvm-project/pull/67304