[turbofan] add RegisterConfiguration to decouple arch specific register layouts from compiler

test/unittests/compiler/instruction-selector-unittest.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 "test/unittests/compiler/instruction-selector-unittest.h"
 
 #include "src/compiler/graph-inl.h"
 #include "src/flags.h"
 #include "test/unittests/compiler/compiler-test-utils.h"
 
@@ skipping 28 matching lines @@
   Linkage linkage(test_->zone(), call_descriptor());
   InstructionBlocks* instruction_blocks =
       InstructionSequence::InstructionBlocksFor(test_->zone(), schedule);
   InstructionSequence sequence(test_->zone(), instruction_blocks);
   SourcePositionTable source_position_table(graph());
   InstructionSelector selector(test_->zone(), graph(), &linkage, &sequence,
                                schedule, &source_position_table, features);
   selector.SelectInstructions();
   if (FLAG_trace_turbo) {
     OFStream out(stdout);
+    PrintableInstructionSequence printable = {
+        RegisterConfiguration::ArchDefault(), &sequence};
     out << "=== Code sequence after instruction selection ===" << std::endl
-        << sequence;
+        << printable;
   }
   Stream s;
   // Map virtual registers.
   {
     const NodeToVregMap& node_map = selector.GetNodeMapForTesting();
     for (int i = 0; i < initial_node_count; ++i) {
       if (node_map[i] != InstructionSelector::kNodeUnmapped) {
         s.virtual_registers_.insert(std::make_pair(i, node_map[i]));
       }
     }
@@ skipping 517 matching lines @@
   EXPECT_EQ(s.ToVreg(context2), s.ToVreg(call_instr->InputAt(12)));
   // Continuation.
 
   EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
   EXPECT_EQ(index, s.size());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8