PPC: Remove register index/code indirection

src/ppc/assembler-ppc.cc

Index: src/ppc/assembler-ppc.cc
diff --git a/src/ppc/assembler-ppc.cc b/src/ppc/assembler-ppc.cc
index 6bbb53c4ba502cac766cebb9e6ea3e137175e02c..032628b7598dd1a8cf4cf6c8e646585efcc7f7dd 100644
--- a/src/ppc/assembler-ppc.cc
+++ b/src/ppc/assembler-ppc.cc
@@ -128,16 +128,6 @@ Register ToRegister(int num) {
 }
 
 
-const char* DoubleRegister::AllocationIndexToString(int index) {
-  DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters);
-  const char* const names[] = {
-      "d1",  "d2",  "d3",  "d4",  "d5",  "d6",  "d7",  "d8",  "d9",  "d10",
-      "d11", "d12", "d15", "d16", "d17", "d18", "d19", "d20", "d21", "d22",
-      "d23", "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31"};
-  return names[index];
-}
-
-
 // -----------------------------------------------------------------------------
 // Implementation of RelocInfo
 
@@ -286,14 +276,14 @@ bool Assembler::IsBranch(Instr instr) { return ((instr & kOpcodeMask) == BCX); }
 
 Register Assembler::GetRA(Instr instr) {
   Register reg;
-  reg.code_ = Instruction::RAValue(instr);
+  reg.reg_code = Instruction::RAValue(instr);
   return reg;
 }
 
 
 Register Assembler::GetRB(Instr instr) {
   Register reg;
-  reg.code_ = Instruction::RBValue(instr);
+  reg.reg_code = Instruction::RBValue(instr);
   return reg;
 }