[llvm] [IR][NFC] Add LoadStoreInstAttributes to copy load/store attrs (PR #206470)

[Harrison Hao via llvm-commits]

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@@ -249,6 +257,19 @@ class LoadInst : public UnaryInstruction {
     setSyncScopeID(SSID);
   }
 
+  /// Returns the attributes of this load instruction.
+  LoadStoreInstAttributes getAttributes() const {
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harrisonGPU wrote:

Done.

https://github.com/llvm/llvm-project/pull/206470