[perf] Replace copy-assign by move-assign in llvm/lib/Target/AMDGPU/ (#179460)

llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp

@@ -4284,7 +4284,7 @@ static std::pair<unsigned, uint8_t> BitOp3_Op(SDValue In,
     SmallVector<SDValue, 3> Backup(Src.begin(), Src.end());
     if (!getOperandBits(LHS, LHSBits) ||
         !getOperandBits(RHS, RHSBits)) {
-      Src = Backup;
+      Src = std::move(Backup);
       return std::make_pair(0, 0);
     }
 

llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp

@@ -4100,7 +4100,7 @@ static std::pair<unsigned, uint8_t> BitOp3_Op(Register R,
     SmallVector<Register, 3> Backup(Src.begin(), Src.end());
     if (!getOperandBits(LHS, LHSBits) ||
         !getOperandBits(RHS, RHSBits)) {
-      Src = Backup;
+      Src = std::move(Backup);
       return std::make_pair(0, 0);
     }
 

llvm/lib/Target/AMDGPU/AMDGPURegBankLegalizeRules.cpp

@@ -311,14 +311,14 @@ void SetOfRulesForOpcode::addFastRuleDivergent(UniformityLLTOpPredicateID Ty,
                                                RegBankLLTMapping RuleApplyIDs) {
   int Slot = getFastPredicateSlot(Ty);
   assert(Slot != -1 && "Ty unsupported in this FastRulesTypes");
-  Div[Slot] = RuleApplyIDs;
+  Div[Slot] = std::move(RuleApplyIDs);
 }
 
 void SetOfRulesForOpcode::addFastRuleUniform(UniformityLLTOpPredicateID Ty,
                                              RegBankLLTMapping RuleApplyIDs) {
   int Slot = getFastPredicateSlot(Ty);
   assert(Slot != -1 && "Ty unsupported in this FastRulesTypes");
-  Uni[Slot] = RuleApplyIDs;
+  Uni[Slot] = std::move(RuleApplyIDs);
 }
 
 int SetOfRulesForOpcode::getFastPredicateSlot(

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCExpr.cpp

@@ -455,7 +455,7 @@ static void unaryOpKnownBitsMapHelper(const MCExpr *Expr, KnownBitsMap &KBM,
     return;
   case MCUnaryExpr::Opcode::Minus: {
     KB.makeNegative();
-    KBM[Expr] = KB;
+    KBM[Expr] = std::move(KB);
     return;
   }
   case MCUnaryExpr::Opcode::Not: {
@@ -466,7 +466,7 @@ static void unaryOpKnownBitsMapHelper(const MCExpr *Expr, KnownBitsMap &KBM,
   }
   case MCUnaryExpr::Opcode::Plus: {
     KB.makeNonNegative();
-    KBM[Expr] = KB;
+    KBM[Expr] = std::move(KB);
     return;
   }
   }
@@ -488,7 +488,7 @@ static void targetOpKnownBitsMapHelper(const MCExpr *Expr, KnownBitsMap &KBM,
       knownBitsMapHelper(Arg, KBM, Depth + 1);
       KB |= KBM[Arg];
     }
-    KBM[Expr] = KB;
+    KBM[Expr] = std::move(KB);
     return;
   }
   case AMDGPUMCExpr::VariantKind::AGVK_Max: {
@@ -498,7 +498,7 @@ static void targetOpKnownBitsMapHelper(const MCExpr *Expr, KnownBitsMap &KBM,
       knownBitsMapHelper(Arg, KBM, Depth + 1);
       KB = KnownBits::umax(KB, KBM[Arg]);
     }
-    KBM[Expr] = KB;
+    KBM[Expr] = std::move(KB);
     return;
   }
   case AMDGPUMCExpr::VariantKind::AGVK_ExtraSGPRs:

llvm/lib/Target/AMDGPU/R600OptimizeVectorRegisters.cpp

@@ -222,8 +222,8 @@ MachineInstr *R600VectorRegMerger::RebuildVector(
 
   // Update RSI
   RSI->Instr = NewMI;
-  RSI->RegToChan = UpdatedRegToChan;
-  RSI->UndefReg = UpdatedUndef;
+  RSI->RegToChan = std::move(UpdatedRegToChan);
+  RSI->UndefReg = std::move(UpdatedUndef);
 
   return NewMI;
 }

llvm/lib/Target/AMDGPU/SIFixSGPRCopies.cpp

@@ -1013,7 +1013,7 @@ void SIFixSGPRCopies::analyzeVGPRToSGPRCopy(MachineInstr* MI) {
       AnalysisWorklist.push_back(U);
     }
   }
-  V2SCopies[Info.ID] = Info;
+  V2SCopies[Info.ID] = std::move(Info);
 }
 
 // The main function that computes the VGPR to SGPR copy score

llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

@@ -692,7 +692,7 @@ convertArgumentInfo(const AMDGPUFunctionArgInfo &ArgInfo,
     if (Arg.isMasked())
       SA.Mask = Arg.getMask();
 
-    A = SA;
+    A = std::move(SA);
     return true;
   };
 

llvm/lib/Target/AMDGPU/SIMachineScheduler.cpp

@@ -922,7 +922,7 @@ void SIScheduleBlockCreator::colorEndsAccordingToDependencies() {
          // combination of children.
       PendingColoring[SU->NodeNum] = NextNonReservedID++;
   }
-  CurrentColoring = PendingColoring;
+  CurrentColoring = std::move(PendingColoring);
 }