[turbofan] Run everything after representation selection concurrently.

src/compiler/instruction.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/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/schedule.h"
 #include "src/compiler/state-values-utils.h"
 
@@ skipping 495 matching lines @@
 
 Constant::Constant(RelocatablePtrConstantInfo info)
 #ifdef V8_HOST_ARCH_32_BIT
     : type_(kInt32), value_(info.value()), rmode_(info.rmode()) {
 }
 #else
     : type_(kInt64), value_(info.value()), rmode_(info.rmode()) {
 }
 #endif
 
+Handle<HeapObject> Constant::ToHeapObject() const {
+  DCHECK_EQ(kHeapObject, type());
+  Handle<HeapObject> value(
+      bit_cast<HeapObject**>(static_cast<intptr_t>(value_)));
+  if (value->IsConsString()) {
+    value = String::Flatten(Handle<String>::cast(value), TENURED);
+  }
+  return value;
+}
+
 std::ostream& operator<<(std::ostream& os, const Constant& constant) {
   switch (constant.type()) {
     case Constant::kInt32:
       return os << constant.ToInt32();
     case Constant::kInt64:
       return os << constant.ToInt64() << "l";
     case Constant::kFloat32:
       return os << constant.ToFloat32() << "f";
     case Constant::kFloat64:
       return os << constant.ToFloat64();
@@ skipping 487 matching lines @@
   }
   for (int i = 0; i < code.InstructionBlockCount(); i++) {
     printable.sequence_->PrintBlock(printable.register_configuration_, i);
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8