Revert of [turbofan] Various fixes to allow unboxed doubles as arguments in registers...

src/compiler/ppc/code-generator-ppc.cc

Index: src/compiler/ppc/code-generator-ppc.cc
diff --git a/src/compiler/ppc/code-generator-ppc.cc b/src/compiler/ppc/code-generator-ppc.cc
index 0cdbd5f6d0c4438791c2042361b4d7e5f8ea6c76..4e9f99fb9c3f5a51299c9a21a3f64abdfaa732ea 100644
--- a/src/compiler/ppc/code-generator-ppc.cc
+++ b/src/compiler/ppc/code-generator-ppc.cc
@@ -99,9 +99,12 @@
 
   MemOperand ToMemOperand(InstructionOperand* op) const {
     DCHECK(op != NULL);
+    DCHECK(!op->IsRegister());
+    DCHECK(!op->IsDoubleRegister());
     DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
-    FrameOffset offset =
-        linkage()->GetFrameOffset(AllocatedOperand::cast(op)->index(), frame());
+    // The linkage computes where all spill slots are located.
+    FrameOffset offset = linkage()->GetFrameOffset(
+        AllocatedOperand::cast(op)->index(), frame(), 0);
     return MemOperand(offset.from_stack_pointer() ? sp : fp, offset.offset());
   }
 };
@@ -1357,7 +1360,6 @@
 void CodeGenerator::AssembleReturn() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   int stack_slots = frame()->GetSpillSlotCount();
-  int pop_count = static_cast<int>(descriptor->StackParameterCount());
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
     if (frame()->GetRegisterSaveAreaSize() > 0) {
       // Remove this frame's spill slots first.
@@ -1376,17 +1378,21 @@
       const RegList saves = descriptor->CalleeSavedRegisters() & ~frame_saves;
       __ MultiPop(saves);
     }
+    __ LeaveFrame(StackFrame::MANUAL);
+    __ Ret();
   } else if (descriptor->IsJSFunctionCall() || needs_frame_) {
     // Canonicalize JSFunction return sites for now.
     if (return_label_.is_bound()) {
       __ b(&return_label_);
-      return;
     } else {
       __ bind(&return_label_);
-    }
-  }
-  __ LeaveFrame(StackFrame::MANUAL, pop_count * kPointerSize);
-  __ Ret();
+      int pop_count = static_cast<int>(descriptor->StackParameterCount());
+      __ LeaveFrame(StackFrame::MANUAL, pop_count * kPointerSize);
+      __ Ret();
+    }
+  } else {
+    __ Ret();
+  }
 }