[turbofan] Add a Simplified::CheckMaps instruction.

src/compiler/verifier.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/verifier.h"
 
 #include <algorithm>
 #include <deque>
 #include <queue>
 #include <sstream>
@@ skipping 291 matching lines @@
       break;
 
     // Common operators
     // ----------------
     case IrOpcode::kParameter: {
       // Parameters have the start node as inputs.
       CHECK_EQ(1, input_count);
       CHECK_EQ(IrOpcode::kStart,
                NodeProperties::GetValueInput(node, 0)->opcode());
       // Parameter has an input that produces enough values.
-      int index = OpParameter<int>(node);
+      int index = ParameterIndexOf(node->op());
       Node* input = NodeProperties::GetValueInput(node, 0);
       // Currently, parameter indices start at -1 instead of 0.
       CHECK_GT(input->op()->ValueOutputCount(), index + 1);
       // Type can be anything.
       CheckUpperIs(node, Type::Any());
       break;
     }
     case IrOpcode::kInt32Constant:  // TODO(rossberg): rename Word32Constant?
       // Constants have no inputs.
       CHECK_EQ(0, input_count);
@@ skipping 388 matching lines @@
     }
     case IrOpcode::kChangeBitToBool: {
       // Boolean /\ UntaggedInt1 -> Boolean /\ TaggedPtr
       // TODO(neis): Activate once ChangeRepresentation works in typer.
       // Type* from = Type::Intersect(Type::Boolean(), Type::UntaggedInt1());
       // Type* to = Type::Intersect(Type::Boolean(), Type::TaggedPtr());
       // CheckValueInputIs(node, 0, from));
       // CheckUpperIs(node, to));
       break;
     }
+    case IrOpcode::kCheckMaps: {
+      // CheckMaps only produces control.
+      CheckNotTyped(node);
+      int32_t map_count = OpParameter<int32_t>(node);
+      // expect [obj, map*, framestate, effect, control]
+      CHECK_EQ(map_count + 4, node->InputCount());
+      CHECK_EQ(IrOpcode::kFrameState, node->InputAt(1 + map_count)->opcode());
+      break;
+    }
 
     case IrOpcode::kLoadField:
       // Object -> fieldtype
       // TODO(rossberg): activate once machine ops are typed.
       // CheckValueInputIs(node, 0, Type::Object());
       // CheckUpperIs(node, FieldAccessOf(node->op()).type));
       break;
     case IrOpcode::kLoadBuffer:
       break;
     case IrOpcode::kLoadElement:
@@ skipping 369 matching lines @@
     // Check inputs for all nodes in the block.
     for (size_t i = 0; i < block->NodeCount(); i++) {
       Node* node = block->NodeAt(i);
       CheckInputsDominate(schedule, block, node, static_cast<int>(i) - 1);
     }
   }
 }
 }
 }
 }  // namespace v8::internal::compiler