Revert of More simplification and unification of frame handling

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

Index: src/crankshaft/mips/lithium-codegen-mips.cc
diff --git a/src/crankshaft/mips/lithium-codegen-mips.cc b/src/crankshaft/mips/lithium-codegen-mips.cc
index ae589613380894314576498b6fbe5a3da146c575..ec4dc5664fc0aa71343b6e1d456f195c1334d2c3 100644
--- a/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -372,7 +372,7 @@
 
 bool LCodeGen::GenerateSafepointTable() {
   DCHECK(is_done());
-  safepoints_.Emit(masm(), GetTotalFrameSlotCount());
+  safepoints_.Emit(masm(), GetStackSlotCount());
   return !is_aborted();
 }
 
@@ -545,7 +545,7 @@
   DCHECK(!op->IsDoubleRegister());
   DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
   if (NeedsEagerFrame()) {
-    return MemOperand(fp, FrameSlotToFPOffset(op->index()));
+    return MemOperand(fp, StackSlotOffset(op->index()));
   } else {
     // Retrieve parameter without eager stack-frame relative to the
     // stack-pointer.
@@ -557,7 +557,7 @@
 MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const {
   DCHECK(op->IsDoubleStackSlot());
   if (NeedsEagerFrame()) {
-    return MemOperand(fp, FrameSlotToFPOffset(op->index()) + kPointerSize);
+    return MemOperand(fp, StackSlotOffset(op->index()) + kPointerSize);
   } else {
     // Retrieve parameter without eager stack-frame relative to the
     // stack-pointer.
@@ -626,6 +626,9 @@
 
   if (op->IsStackSlot()) {
     int index = op->index();
+    if (index >= 0) {
+      index += StandardFrameConstants::kFixedFrameSize / kPointerSize;
+    }
     if (is_tagged) {
       translation->StoreStackSlot(index);
     } else if (is_uint32) {
@@ -635,6 +638,9 @@
     }
   } 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);