Replace some unnecessary vector copies with references.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190770 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 8 insertions, 10 deletions

diff --git a/lib/CodeGen/MachineLICM.cpp b/lib/CodeGen/MachineLICM.cpp
index 596b7a3..104eacd 100644
--- a/lib/CodeGen/MachineLICM.cpp
+++ b/lib/CodeGen/MachineLICM.cpp
@@ -502,7 +502,7 @@ void MachineLICM::HoistRegionPostRA() {
 
   // Walk the entire region, count number of defs for each register, and
   // collect potential LICM candidates.
-  const std::vector<MachineBasicBlock*> Blocks = CurLoop->getBlocks();
+  const std::vector<MachineBasicBlock *> &Blocks = CurLoop->getBlocks();
   for (unsigned i = 0, e = Blocks.size(); i != e; ++i) {
     MachineBasicBlock *BB = Blocks[i];
 
@@ -584,7 +584,7 @@ void MachineLICM::HoistRegionPostRA() {
 /// AddToLiveIns - Add register 'Reg' to the livein sets of BBs in the current
 /// loop, and make sure it is not killed by any instructions in the loop.
 void MachineLICM::AddToLiveIns(unsigned Reg) {
-  const std::vector<MachineBasicBlock*> Blocks = CurLoop->getBlocks();
+  const std::vector<MachineBasicBlock *> &Blocks = CurLoop->getBlocks();
   for (unsigned i = 0, e = Blocks.size(); i != e; ++i) {
     MachineBasicBlock *BB = Blocks[i];
     if (!BB->isLiveIn(Reg))
diff --git a/lib/Target/ARM/ARMConstantPoolValue.cpp b/lib/Target/ARM/ARMConstantPoolValue.cpp
index 4e703ec..8e17f47 100644
--- a/lib/Target/ARM/ARMConstantPoolValue.cpp
+++ b/lib/Target/ARM/ARMConstantPoolValue.cpp
@@ -164,7 +164,7 @@ const BlockAddress *ARMConstantPoolConstant::getBlockAddress() const {
 int ARMConstantPoolConstant::getExistingMachineCPValue(MachineConstantPool *CP,
                                                        unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;
-  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
   for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
     if (Constants[i].isMachineConstantPoolEntry() &&
         (Constants[i].getAlignment() & AlignMask) == 0) {
@@ -217,7 +217,7 @@ ARMConstantPoolSymbol::Create(LLVMContext &C, const char *s,
 int ARMConstantPoolSymbol::getExistingMachineCPValue(MachineConstantPool *CP,
                                                      unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;
-  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
   for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
     if (Constants[i].isMachineConstantPoolEntry() &&
         (Constants[i].getAlignment() & AlignMask) == 0) {
@@ -272,7 +272,7 @@ ARMConstantPoolMBB *ARMConstantPoolMBB::Create(LLVMContext &C,
 int ARMConstantPoolMBB::getExistingMachineCPValue(MachineConstantPool *CP,
                                                   unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;
-  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
   for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
     if (Constants[i].isMachineConstantPoolEntry() &&
         (Constants[i].getAlignment() & AlignMask) == 0) {
diff --git a/lib/Target/Hexagon/HexagonHardwareLoops.cpp b/lib/Target/Hexagon/HexagonHardwareLoops.cpp
index 3c4ca0f..52d5ab2 100644
--- a/lib/Target/Hexagon/HexagonHardwareLoops.cpp
+++ b/lib/Target/Hexagon/HexagonHardwareLoops.cpp
@@ -871,7 +871,7 @@ bool HexagonHardwareLoops::isInvalidLoopOperation(
 /// \brief - Return true if the loop contains an instruction that inhibits
 /// the use of the hardware loop function.
 bool HexagonHardwareLoops::containsInvalidInstruction(MachineLoop *L) const {
-  const std::vector<MachineBasicBlock*> Blocks = L->getBlocks();
+  const std::vector<MachineBasicBlock *> &Blocks = L->getBlocks();
   for (unsigned i = 0, e = Blocks.size(); i != e; ++i) {
     MachineBasicBlock *MBB = Blocks[i];
     for (MachineBasicBlock::iterator
diff --git a/lib/Target/SystemZ/SystemZConstantPoolValue.cpp b/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
index e9c4f6d..6c70811 100644
--- a/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
+++ b/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
@@ -39,7 +39,7 @@ unsigned SystemZConstantPoolValue::getRelocationInfo() const {
 int SystemZConstantPoolValue::
 getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
   unsigned AlignMask = Alignment - 1;
-  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
   for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
     if (Constants[I].isMachineConstantPoolEntry() &&
         (Constants[I].getAlignment() & AlignMask) == 0) {
diff --git a/lib/Transforms/Utils/LoopUnroll.cpp b/lib/Transforms/Utils/LoopUnroll.cpp
index cb581b3..0b679fe 100644
--- a/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/lib/Transforms/Utils/LoopUnroll.cpp
@@ -239,8 +239,6 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, unsigned TripCount,
     DEBUG(dbgs() << "!\n");
   }
 
-  std::vector<BasicBlock*> LoopBlocks = L->getBlocks();
-
   bool ContinueOnTrue = L->contains(BI->getSuccessor(0));
   BasicBlock *LoopExit = BI->getSuccessor(ContinueOnTrue);
 
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp
index ee417bc..cc08df9 100644
--- a/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/utils/TableGen/RegisterInfoEmitter.cpp
@@ -121,7 +121,7 @@ void RegisterInfoEmitter::runEnums(raw_ostream &OS,
       OS << "}\n";
   }
 
-  const std::vector<Record*> RegAltNameIndices = Target.getRegAltNameIndices();
+  const std::vector<Record*> &RegAltNameIndices = Target.getRegAltNameIndices();
   // If the only definition is the default NoRegAltName, we don't need to
   // emit anything.
   if (RegAltNameIndices.size() > 1) {