[turbofan] Initial attempt to cleanup Node and related classes.

src/compiler/mips/instruction-selector-mips.cc

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 4d3577fd26f80cfc3330690eb22b262e63b83065..d6840172779538df58303882abe2eeccd8b95fa4 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -5,6 +5,7 @@
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
+#include "src/compiler/node-properties.h"
 
 namespace v8 {
 namespace internal {
@@ -468,10 +469,10 @@ void InstructionSelector::VisitCall(Node* node) {
     Emit(kMipsStackClaim | MiscField::encode(push_count), NULL);
   }
   int slot = buffer.pushed_nodes.size() - 1;
-  for (NodeVectorRIter input = buffer.pushed_nodes.rbegin();
-       input != buffer.pushed_nodes.rend(); input++) {
-    Emit(kMipsStoreToStackSlot | MiscField::encode(slot), NULL,
-         g.UseRegister(*input));
+  for (auto i = buffer.pushed_nodes.rbegin(); i != buffer.pushed_nodes.rend();
+       ++i) {
+    Emit(kMipsStoreToStackSlot | MiscField::encode(slot), nullptr,
+         g.UseRegister(*i));
     slot--;
   }
 
@@ -691,14 +692,14 @@ void VisitWordCompareZero(InstructionSelector* selector, Node* user,
       case IrOpcode::kProjection:
         // Check if this is the overflow output projection of an
         // <Operation>WithOverflow node.
-        if (OpParameter<size_t>(value) == 1u) {
+        if (ProjectionIndexOf(value->op()) == 1u) {
           // We cannot combine the <Operation>WithOverflow with this branch
           // unless the 0th projection (the use of the actual value of the
           // <Operation> is either NULL, which means there's no use of the
           // actual value, or was already defined, which means it is scheduled
           // *AFTER* this branch).
           Node* const node = value->InputAt(0);
-          Node* const result = node->FindProjection(0);
+          Node* const result = NodeProperties::FindProjection(node, 0);
           if (!result || selector->IsDefined(result)) {
             switch (node->opcode()) {
               case IrOpcode::kInt32AddWithOverflow:
@@ -778,7 +779,7 @@ void InstructionSelector::VisitUint32LessThanOrEqual(Node* node) {
 
 
 void InstructionSelector::VisitInt32AddWithOverflow(Node* node) {
-  if (Node* ovf = node->FindProjection(1)) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
     FlagsContinuation cont(kOverflow, ovf);
     return VisitBinop(this, node, kMipsAddOvf, &cont);
   }
@@ -788,7 +789,7 @@ void InstructionSelector::VisitInt32AddWithOverflow(Node* node) {
 
 
 void InstructionSelector::VisitInt32SubWithOverflow(Node* node) {
-  if (Node* ovf = node->FindProjection(1)) {
+  if (Node* ovf = NodeProperties::FindProjection(node, 1)) {
     FlagsContinuation cont(kOverflow, ovf);
     return VisitBinop(this, node, kMipsSubOvf, &cont);
   }