Replace std::copy with a back inserter with vector append where feasible

All of the cases were just appending from random access iterators to a
vector. Using insert/append can grow the vector to the perfect size
directly and moves the growing out of the loop. No intended functionalty
change.

llvm-svn: 230845

llvm/include/llvm/Analysis/IntervalIterator.h

@@ -78,7 +78,7 @@ inline void addNodeToInterval(Interval *Int, BasicBlock *BB) {
 //
 inline void addNodeToInterval(Interval *Int, Interval *I) {
   // Add all of the nodes in I as new nodes in Int.
-  copy(I->Nodes.begin(), I->Nodes.end(), back_inserter(Int->Nodes));
+  Int->Nodes.insert(Int->Nodes.end(), I->Nodes.begin(), I->Nodes.end());
 }
 
 

llvm/lib/CodeGen/Analysis.cpp

@@ -312,8 +312,7 @@ static const Value *getNoopInput(const Value *V,
       // previous aggregate. Combine the two paths to obtain the true address of
       // our element.
       ArrayRef<unsigned> ExtractLoc = EVI->getIndices();
-      std::copy(ExtractLoc.rbegin(), ExtractLoc.rend(),
+      ValLoc.append(ExtractLoc.rbegin(), ExtractLoc.rend());
-                std::back_inserter(ValLoc));
       NoopInput = Op;
     }
     // Terminate if we couldn't find anything to look through.
@@ -601,10 +600,8 @@ bool llvm::returnTypeIsEligibleForTailCall(const Function *F,
     // The manipulations performed when we're looking through an insertvalue or
     // an extractvalue would happen at the front of the RetPath list, so since
     // we have to copy it anyway it's more efficient to create a reversed copy.
-    using std::copy;
+    SmallVector<unsigned, 4> TmpRetPath(RetPath.rbegin(), RetPath.rend());
-    SmallVector<unsigned, 4> TmpRetPath, TmpCallPath;
+    SmallVector<unsigned, 4> TmpCallPath(CallPath.rbegin(), CallPath.rend());
-    copy(RetPath.rbegin(), RetPath.rend(), std::back_inserter(TmpRetPath));
-    copy(CallPath.rbegin(), CallPath.rend(), std::back_inserter(TmpCallPath));
 
     // Finally, we can check whether the value produced by the tail call at this
     // index is compatible with the value we return.

llvm/lib/CodeGen/IfConversion.cpp

@@ -1555,7 +1555,7 @@ void IfConverter::PredicateBlock(BBInfo &BBI,
     UpdatePredRedefs(I, Redefs);
   }
 
-  std::copy(Cond.begin(), Cond.end(), std::back_inserter(BBI.Predicate));
+  BBI.Predicate.append(Cond.begin(), Cond.end());
 
   BBI.IsAnalyzed = false;
   BBI.NonPredSize = 0;
@@ -1620,9 +1620,8 @@ void IfConverter::CopyAndPredicateBlock(BBInfo &ToBBI, BBInfo &FromBBI,
     }
   }
 
-  std::copy(FromBBI.Predicate.begin(), FromBBI.Predicate.end(),
+  ToBBI.Predicate.append(FromBBI.Predicate.begin(), FromBBI.Predicate.end());
-            std::back_inserter(ToBBI.Predicate));
+  ToBBI.Predicate.append(Cond.begin(), Cond.end());
-  std::copy(Cond.begin(), Cond.end(), std::back_inserter(ToBBI.Predicate));
 
   ToBBI.ClobbersPred |= FromBBI.ClobbersPred;
   ToBBI.IsAnalyzed = false;
@@ -1661,8 +1660,7 @@ void IfConverter::MergeBlocks(BBInfo &ToBBI, BBInfo &FromBBI, bool AddEdges) {
   if (NBB && !FromBBI.BB->isSuccessor(NBB))
     FromBBI.BB->addSuccessor(NBB);
 
-  std::copy(FromBBI.Predicate.begin(), FromBBI.Predicate.end(),
+  ToBBI.Predicate.append(FromBBI.Predicate.begin(), FromBBI.Predicate.end());
-            std::back_inserter(ToBBI.Predicate));
   FromBBI.Predicate.clear();
 
   ToBBI.NonPredSize += FromBBI.NonPredSize;

llvm/lib/CodeGen/PeepholeOptimizer.cpp

@@ -411,8 +411,7 @@ optimizeExtInstr(MachineInstr *MI, MachineBasicBlock *MBB,
 
   if (ExtendLife && !ExtendedUses.empty())
     // Extend the liveness of the extension result.
-    std::copy(ExtendedUses.begin(), ExtendedUses.end(),
+    Uses.append(ExtendedUses.begin(), ExtendedUses.end());
-              std::back_inserter(Uses));
 
   // Now replace all uses.
   bool Changed = false;

llvm/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp

@@ -67,8 +67,7 @@ void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
       // A single location description describing the location of the object...
       StringRef str = data.getData().substr(Offset, Bytes);
       Offset += Bytes;
-      E.Loc.reserve(str.size());
+      E.Loc.append(str.begin(), str.end());
-      std::copy(str.begin(), str.end(), std::back_inserter(E.Loc));
       Loc.Entries.push_back(std::move(E));
     }
   }

llvm/lib/Target/X86/X86InstrInfo.cpp

@@ -5559,7 +5559,7 @@ X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
   }
   if (Load)
     BeforeOps.push_back(SDValue(Load, 0));
-  std::copy(AfterOps.begin(), AfterOps.end(), std::back_inserter(BeforeOps));
+  BeforeOps.insert(BeforeOps.end(), AfterOps.begin(), AfterOps.end());
   SDNode *NewNode= DAG.getMachineNode(Opc, dl, VTs, BeforeOps);
   NewNodes.push_back(NewNode);
 

llvm/lib/Transforms/Scalar/SROA.cpp

@@ -247,7 +247,7 @@ public:
   /// hold.
   void insert(ArrayRef<Slice> NewSlices) {
     int OldSize = Slices.size();
-    std::move(NewSlices.begin(), NewSlices.end(), std::back_inserter(Slices));
+    Slices.append(NewSlices.begin(), NewSlices.end());
     auto SliceI = Slices.begin() + OldSize;
     std::sort(SliceI, Slices.end());
     std::inplace_merge(Slices.begin(), SliceI, Slices.end());

llvm/utils/TableGen/AsmMatcherEmitter.cpp

@@ -1447,8 +1447,9 @@ void AsmMatcherInfo::buildInfo() {
       II->buildAliasResultOperands();
   }
   if (!NewMatchables.empty())
-    std::move(NewMatchables.begin(), NewMatchables.end(),
+    Matchables.insert(Matchables.end(),
-              std::back_inserter(Matchables));
+                      std::make_move_iterator(NewMatchables.begin()),
+                      std::make_move_iterator(NewMatchables.end()));
 
   // Process token alias definitions and set up the associated superclass
   // information.