More simplification and unification of frame handling

src/crankshaft/x64/lithium-codegen-x64.cc

Index: src/crankshaft/x64/lithium-codegen-x64.cc
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc
index e4470d81beb9b45b0ced0482ab59d504b2279189..e64f928b95d0887d002d656a382d498e3c4f1085 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -406,7 +406,7 @@ bool LCodeGen::GenerateDeferredCode() {
 
 bool LCodeGen::GenerateSafepointTable() {
   DCHECK(is_done());
-  safepoints_.Emit(masm(), GetStackSlotCount());
+  safepoints_.Emit(masm(), GetTotalFrameSlotCount());
   return !is_aborted();
 }
 
@@ -507,7 +507,7 @@ Operand LCodeGen::ToOperand(LOperand* op) const {
   // representable as an Operand.
   DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
   if (NeedsEagerFrame()) {
-    return Operand(rbp, StackSlotOffset(op->index()));
+    return Operand(rbp, FrameSlotToFPOffset(op->index()));
   } else {
     // Retrieve parameter without eager stack-frame relative to the
     // stack-pointer.
@@ -575,9 +575,6 @@ void LCodeGen::AddToTranslation(LEnvironment* environment,
 
   if (op->IsStackSlot()) {
     int index = op->index();
-    if (index >= 0) {
-      index += StandardFrameConstants::kFixedFrameSize / kPointerSize;
-    }
     if (is_tagged) {
       translation->StoreStackSlot(index);
     } else if (is_uint32) {
@@ -587,9 +584,6 @@ void LCodeGen::AddToTranslation(LEnvironment* environment,
     }
   } else if (op->IsDoubleStackSlot()) {
     int index = op->index();
-    if (index >= 0) {
-      index += StandardFrameConstants::kFixedFrameSize / kPointerSize;
-    }
     translation->StoreDoubleStackSlot(index);
   } else if (op->IsRegister()) {
     Register reg = ToRegister(op);