[turbofan] Add a CHECK for max node input count

src/compiler/instruction.h

 // 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.
 
 #ifndef V8_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 797 matching lines @@
   }
 
   static Instruction* New(Zone* zone, InstructionCode opcode,
                           size_t output_count, InstructionOperand* outputs,
                           size_t input_count, InstructionOperand* inputs,
                           size_t temp_count, InstructionOperand* temps) {
     DCHECK(opcode >= 0);
     DCHECK(output_count == 0 || outputs != nullptr);
     DCHECK(input_count == 0 || inputs != nullptr);
     DCHECK(temp_count == 0 || temps != nullptr);
+    // TODO(jarin/mstarzinger): Handle this gracefully. See crbug.com/582702.
+    CHECK(InputCountField::is_valid(input_count));
+
     size_t total_extra_ops = output_count + input_count + temp_count;
     if (total_extra_ops != 0) total_extra_ops--;
     int size = static_cast<int>(
         RoundUp(sizeof(Instruction), sizeof(InstructionOperand)) +
         total_extra_ops * sizeof(InstructionOperand));
     return new (zone->New(size)) Instruction(
         opcode, output_count, outputs, input_count, inputs, temp_count, temps);
   }
 
   Instruction* MarkAsCall() {
@@ skipping 639 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_