PPC: Remove register index/code indirection

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 5101ba932eda4913a5609db27998efb34c64a190..756b6476af4c396b1d7682387c6dc42c3352592c 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -73,7 +73,7 @@ void LCodeGen::SaveCallerDoubles() {
   BitVector* doubles = chunk()->allocated_double_registers();
   BitVector::Iterator save_iterator(doubles);
   while (!save_iterator.Done()) {
-    __ stfd(DoubleRegister::FromAllocationIndex(save_iterator.Current()),
+    __ stfd(DoubleRegister::from_code(save_iterator.Current()),
             MemOperand(sp, count * kDoubleSize));
     save_iterator.Advance();
     count++;
@@ -89,7 +89,7 @@ void LCodeGen::RestoreCallerDoubles() {
   BitVector::Iterator save_iterator(doubles);
   int count = 0;
   while (!save_iterator.Done()) {
-    __ lfd(DoubleRegister::FromAllocationIndex(save_iterator.Current()),
+    __ lfd(DoubleRegister::from_code(save_iterator.Current()),
            MemOperand(sp, count * kDoubleSize));
     save_iterator.Advance();
     count++;
@@ -394,13 +394,13 @@ bool LCodeGen::GenerateSafepointTable() {
 }
 
 
-Register LCodeGen::ToRegister(int index) const {
-  return Register::FromAllocationIndex(index);
+Register LCodeGen::ToRegister(int code) const {
+  return Register::from_code(code);
 }
 
 
-DoubleRegister LCodeGen::ToDoubleRegister(int index) const {
-  return DoubleRegister::FromAllocationIndex(index);
+DoubleRegister LCodeGen::ToDoubleRegister(int code) const {
+  return DoubleRegister::from_code(code);
 }