[turbofan] First version of loop peeling.

src/compiler/scheduler.cc

Index: src/compiler/scheduler.cc
diff --git a/src/compiler/scheduler.cc b/src/compiler/scheduler.cc
index cb11bec23725fb422e4ce338203f7b4b281df468..1b514a6cf456ab2b8514241705aefb09d967a0ec 100644
--- a/src/compiler/scheduler.cc
+++ b/src/compiler/scheduler.cc
@@ -1328,7 +1328,7 @@ class ScheduleLateNodeVisitor {
   BasicBlock* GetBlockForUse(Edge edge) {
     Node* use = edge.from();
     IrOpcode::Value opcode = use->opcode();
-    if (opcode == IrOpcode::kPhi || opcode == IrOpcode::kEffectPhi) {
+    if (IrOpcode::IsPhiOpcode(opcode)) {
       // If the use is from a coupled (i.e. floating) phi, compute the common
       // dominator of its uses. This will not recurse more than one level.
       if (scheduler_->GetPlacement(use) == Scheduler::kCoupled) {
@@ -1438,10 +1438,8 @@ void Scheduler::FuseFloatingControl(BasicBlock* block, Node* node) {
   NodeVector propagation_roots(control_flow_builder_->control_);
   for (Node* node : control_flow_builder_->control_) {
     for (Node* use : node->uses()) {
-      if (use->opcode() == IrOpcode::kPhi ||
-          use->opcode() == IrOpcode::kEffectPhi) {
+      if (IrOpcode::IsPhiOpcode(use->opcode()))
         propagation_roots.push_back(use);
-      }
     }
   }
   if (FLAG_trace_turbo_scheduler) {