[turbofan] add register assignment verifier

src/compiler/pipeline.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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 566 matching lines @@
   Frame frame;
   {
     int node_count = sequence.VirtualRegisterCount();
     if (node_count > UnallocatedOperand::kMaxVirtualRegisters) {
       info()->AbortOptimization(kNotEnoughVirtualRegistersForValues);
       return Handle<Code>::null();
     }
     ZonePool::Scope zone_scope(data->zone_pool());
 
     SmartArrayPointer<char> debug_name;
+    RegisterAllocator::VerificationType verification_type =
+        RegisterAllocator::kNoVerify;
 #ifdef DEBUG
     debug_name = GetDebugName(info());
+    verification_type = RegisterAllocator::kVerifyAssignment;
 #endif
 
-
     RegisterAllocator allocator(RegisterConfiguration::ArchDefault(),
                                 zone_scope.zone(), &frame, &sequence,
                                 debug_name.get());
-    if (!allocator.Allocate(data->pipeline_statistics())) {
+    if (!allocator.Allocate(data->pipeline_statistics(), verification_type)) {
       info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);
       return Handle<Code>::null();
     }
     if (FLAG_trace_turbo) {
       TurboCfgFile tcf(isolate());
       tcf << AsC1VAllocator("CodeGen", &allocator);
     }
   }
 
   if (FLAG_trace_turbo) {
@@ skipping 31 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8