Clean up node iteration

src/compiler/instruction-selector.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/instruction-selector.h"
 
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 29 matching lines @@
     BasicBlock* block = *i;
     if (!block->IsLoopHeader()) continue;
     DCHECK_NE(0, static_cast<int>(block->PredecessorCount()));
     DCHECK_NE(1, static_cast<int>(block->PredecessorCount()));
     for (BasicBlock::const_iterator j = block->begin(); j != block->end();
          ++j) {
       Node* phi = *j;
       if (phi->opcode() != IrOpcode::kPhi) continue;
 
       // Mark all inputs as used.
-      Node::Inputs inputs = phi->inputs();
-      for (InputIter k = inputs.begin(); k != inputs.end(); ++k) {
-        MarkAsUsed(*k);
+      for (Node* const k : phi->inputs()) {
+        MarkAsUsed(k);
       }
     }
   }
 
   // Visit each basic block in post order.
   for (BasicBlockVectorRIter i = blocks->rbegin(); i != blocks->rend(); ++i) {
     VisitBlock(*i);
   }
 
   // Schedule the selected instructions.
@@ skipping 339 matching lines @@
   }
   DCHECK(1 + buffer->frame_state_value_count() ==
          buffer->instruction_args.size());
 
   size_t input_count = static_cast<size_t>(buffer->input_count());
 
   // Split the arguments into pushed_nodes and instruction_args. Pushed
   // arguments require an explicit push instruction before the call and do
   // not appear as arguments to the call. Everything else ends up
   // as an InstructionOperand argument to the call.
-  InputIter iter(call->inputs().begin());
+  auto iter(call->inputs().begin());
   int pushed_count = 0;
   for (size_t index = 0; index < input_count; ++iter, ++index) {
     DCHECK(iter != call->inputs().end());
-    DCHECK(index == static_cast<size_t>(iter.index()));
     DCHECK((*iter)->op()->opcode() != IrOpcode::kFrameState);
     if (index == 0) continue;  // The first argument (callee) is already done.
     InstructionOperand* op =
         g.UseLocation(*iter, buffer->descriptor->GetInputLocation(index),
                       buffer->descriptor->GetInputType(index));
     if (UnallocatedOperand::cast(op)->HasFixedSlotPolicy()) {
       int stack_index = -UnallocatedOperand::cast(op)->fixed_slot_index() - 1;
       if (static_cast<size_t>(stack_index) >= buffer->pushed_nodes.size()) {
         buffer->pushed_nodes.resize(stack_index + 1, NULL);
       }
@@ skipping 717 matching lines @@
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::Flag::kNoFlags;
 }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8