rule-of-three, use std::move

Address rule-of-three violation in MergeAllocas.h
Use std::move in leaf code in CodeSinking.cpp

Author: fda0

IGC/AdaptorCommon/RayTracing/MergeAllocas.h

@@ -47,6 +47,9 @@ namespace IGC
             clearLivenessInfo();
         }
 
+        AllocationBasedLivenessAnalysis (const AllocationBasedLivenessAnalysis &) = delete;
+        AllocationBasedLivenessAnalysis & operator=(const AllocationBasedLivenessAnalysis &) = delete;
+
         bool runOnFunction(llvm::Function& F) override;
         llvm::StringRef getPassName() const override
         {

IGC/Compiler/CISACodeGen/CodeSinking.cpp

@@ -1167,7 +1167,7 @@ namespace IGC {
             InstrVec BBInstructions;
             for (Instruction &I : *BB)
                 BBInstructions.push_back(&I);
-            OriginalPositions[BB] = BBInstructions;
+            OriginalPositions[BB] = std::move(BBInstructions);
         }
 
         auto rerunLiveness = [&]()