[RegisterConfiguration] Streamline access to arch defaults, simplify Registers.

src/crankshaft/hydrogen.cc

 // Copyright 2013 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/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 50 matching lines @@
 #include "src/crankshaft/s390/lithium-codegen-s390.h"  // NOLINT
 #elif V8_TARGET_ARCH_X87
 #include "src/crankshaft/x87/lithium-codegen-x87.h"  // NOLINT
 #else
 #error Unsupported target architecture.
 #endif
 
 namespace v8 {
 namespace internal {
 
+const auto GetRegConfig = RegisterConfiguration::Crankshaft;
+
 class HOptimizedGraphBuilderWithPositions : public HOptimizedGraphBuilder {
  public:
   explicit HOptimizedGraphBuilderWithPositions(CompilationInfo* info)
       : HOptimizedGraphBuilder(info) {}
 
 #define DEF_VISIT(type)                                      \
   void Visit##type(type* node) override {                    \
     SourcePosition old_position = SourcePosition::Unknown(); \
     if (node->position() != RelocInfo::kNoPosition) {        \
       old_position = source_position();                      \
@@ skipping 13464 matching lines @@
 void HTracer::TraceLiveRange(LiveRange* range, const char* type,
                              Zone* zone) {
   if (range != NULL && !range->IsEmpty()) {
     PrintIndent();
     trace_.Add("%d %s", range->id(), type);
     if (range->HasRegisterAssigned()) {
       LOperand* op = range->CreateAssignedOperand(zone);
       int assigned_reg = op->index();
       if (op->IsDoubleRegister()) {
         trace_.Add(" \"%s\"",
-                   DoubleRegister::from_code(assigned_reg).ToString());
+                   GetRegConfig()->GetDoubleRegisterName(assigned_reg));
       } else {
         DCHECK(op->IsRegister());
-        trace_.Add(" \"%s\"", Register::from_code(assigned_reg).ToString());
+        trace_.Add(" \"%s\"",
+                   GetRegConfig()->GetGeneralRegisterName(assigned_reg));
       }
     } else if (range->IsSpilled()) {
       LOperand* op = range->TopLevel()->GetSpillOperand();
       if (op->IsDoubleStackSlot()) {
         trace_.Add(" \"double_stack:%d\"", op->index());
       } else {
         DCHECK(op->IsStackSlot());
         trace_.Add(" \"stack:%d\"", op->index());
       }
     }
@@ skipping 119 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8