[perf] Replace copy-assign by move-assign in llvm/lib/Analysis/* (#178169)

llvm/lib/Analysis/IVDescriptors.cpp

@@ -656,11 +656,10 @@ bool RecurrenceDescriptor::AddReductionVar(
   // is saved as part of the RecurrenceDescriptor.
 
   // Save the description of this reduction variable.
-  RecurrenceDescriptor RD(RdxStart, ExitInstruction, IntermediateStore, Kind,
-                          FMF, ExactFPMathInst, RecurrenceType, IsSigned,
-                          IsOrdered, CastInsts, MinWidthCastToRecurrenceType);
-  RedDes = RD;
-
+  RedDes =
+      RecurrenceDescriptor(RdxStart, ExitInstruction, IntermediateStore, Kind,
+                           FMF, ExactFPMathInst, RecurrenceType, IsSigned,
+                           IsOrdered, CastInsts, MinWidthCastToRecurrenceType);
   return true;
 }
 

llvm/lib/Analysis/InlineCost.cpp

@@ -1728,7 +1728,7 @@ bool CallAnalyzer::canFoldInboundsGEP(GetElementPtrInst &I) {
     return false;
 
   // Add the result as a new mapping to Base + Offset.
-  ConstantOffsetPtrs[&I] = BaseAndOffset;
+  ConstantOffsetPtrs[&I] = std::move(BaseAndOffset);
 
   return true;
 }

llvm/lib/Analysis/LoopUnrollAnalyzer.cpp

@@ -66,7 +66,7 @@ bool UnrolledInstAnalyzer::simplifyInstWithSCEV(Instruction *I) {
   SimplifiedAddress Address;
   Address.Base = Base->getValue();
   Address.Offset = *Offset;
-  SimplifiedAddresses[I] = Address;
+  SimplifiedAddresses[I] = std::move(Address);
   return false;
 }