[turbofan] Move node verification methods to the Verifier class.

src/compiler/verifier.cc

Index: src/compiler/verifier.cc
diff --git a/src/compiler/verifier.cc b/src/compiler/verifier.cc
index 20a0d76248100473cbee7c83e55e47ada12541c3..9e0a0daa98f5cc76ca70a283beecd35c78e282f3 100644
--- a/src/compiler/verifier.cc
+++ b/src/compiler/verifier.cc
@@ -1154,6 +1154,68 @@ void ScheduleVerifier::Run(Schedule* schedule) {
     }
   }
 }
+
+
+#ifdef DEBUG
+
+// static
+void Verifier::VerifyNode(Node* node) {
+  CHECK_EQ(OperatorProperties::GetTotalInputCount(node->op()),
+           node->InputCount());
+  // If this node has no effect or no control outputs,
+  // we check that no its uses are effect or control inputs.
+  bool check_no_control = node->op()->ControlOutputCount() == 0;
+  bool check_no_effect = node->op()->EffectOutputCount() == 0;
+  bool check_no_frame_state = node->opcode() != IrOpcode::kFrameState;
+  if (check_no_effect || check_no_control) {
+    for (Edge edge : node->use_edges()) {
+      Node* const user = edge.from();
+      CHECK(!user->IsDead());
+      if (NodeProperties::IsControlEdge(edge)) {
+        CHECK(!check_no_control);
+      } else if (NodeProperties::IsEffectEdge(edge)) {
+        CHECK(!check_no_effect);
+      } else if (NodeProperties::IsFrameStateEdge(edge)) {
+        CHECK(!check_no_frame_state);
+      }
+    }
+  }
+  // Frame state inputs should be frame states (or sentinels).
+  for (int i = 0; i < OperatorProperties::GetFrameStateInputCount(node->op());
+       i++) {
+    Node* input = NodeProperties::GetFrameStateInput(node, i);
+    CHECK(input->opcode() == IrOpcode::kFrameState ||
+          input->opcode() == IrOpcode::kStart ||
+          input->opcode() == IrOpcode::kDead);
+  }
+  // Effect inputs should be effect-producing nodes (or sentinels).
+  for (int i = 0; i < node->op()->EffectInputCount(); i++) {
+    Node* input = NodeProperties::GetEffectInput(node, i);
+    CHECK(input->op()->EffectOutputCount() > 0 ||
+          input->opcode() == IrOpcode::kDead);
+  }
+  // Control inputs should be control-producing nodes (or sentinels).
+  for (int i = 0; i < node->op()->ControlInputCount(); i++) {
+    Node* input = NodeProperties::GetControlInput(node, i);
+    CHECK(input->op()->ControlOutputCount() > 0 ||
+          input->opcode() == IrOpcode::kDead);
+  }
+}
+
+
+void Verifier::VerifyEdgeInputReplacement(const Edge& edge,
+                                          const Node* replacement) {
+  // Check that the user does not misuse the replacement.
+  DCHECK(!NodeProperties::IsControlEdge(edge) ||
+         replacement->op()->ControlOutputCount() > 0);
+  DCHECK(!NodeProperties::IsEffectEdge(edge) ||
+         replacement->op()->EffectOutputCount() > 0);
+  DCHECK(!NodeProperties::IsFrameStateEdge(edge) ||
+         replacement->opcode() == IrOpcode::kFrameState);
+}
+
+#endif  // DEBUG
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8