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

src/compiler/x87/code-generator-x87.cc

Index: src/compiler/x87/code-generator-x87.cc
diff --git a/src/compiler/x87/code-generator-x87.cc b/src/compiler/x87/code-generator-x87.cc
index bbde90e5c4433b14418f96fb8d8973cb67a00fbb..c274610226e99aba784dfa58e965a401138318da 100644
--- a/src/compiler/x87/code-generator-x87.cc
+++ b/src/compiler/x87/code-generator-x87.cc
@@ -38,12 +38,15 @@
     if (op->IsRegister()) {
       DCHECK(extra == 0);
       return Operand(ToRegister(op));
+    } else if (op->IsDoubleRegister()) {
+      DCHECK(extra == 0);
+      UNIMPLEMENTED();
     }
     DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
-    FrameOffset offset =
-        linkage()->GetFrameOffset(AllocatedOperand::cast(op)->index(), frame());
-    return Operand(offset.from_stack_pointer() ? esp : ebp,
-                   offset.offset() + extra);
+    // The linkage computes where all spill slots are located.
+    FrameOffset offset = linkage()->GetFrameOffset(
+        AllocatedOperand::cast(op)->index(), frame(), extra);
+    return Operand(offset.from_stack_pointer() ? esp : ebp, offset.offset());
   }
 
   Operand HighOperand(InstructionOperand* op) {
@@ -1565,7 +1568,6 @@
 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) {
     const RegList saves = descriptor->CalleeSavedRegisters();
     if (frame()->GetRegisterSaveAreaSize() > 0) {
@@ -1581,26 +1583,30 @@
         }
       }
       __ pop(ebp);  // Pop caller's frame pointer.
+      __ ret(0);
     } else {
       // No saved registers.
       __ mov(esp, ebp);  // Move stack pointer back to frame pointer.
       __ pop(ebp);       // Pop caller's frame pointer.
+      __ ret(0);
     }
   } else if (descriptor->IsJSFunctionCall() || needs_frame_) {
     // Canonicalize JSFunction return sites for now.
     if (return_label_.is_bound()) {
       __ jmp(&return_label_);
-      return;
     } else {
       __ bind(&return_label_);
       __ mov(esp, ebp);  // Move stack pointer back to frame pointer.
       __ pop(ebp);       // Pop caller's frame pointer.
-    }
-  }
-  if (pop_count == 0) {
+      int pop_count = static_cast<int>(descriptor->StackParameterCount());
+      if (pop_count == 0) {
+        __ ret(0);
+      } else {
+        __ Ret(pop_count * kPointerSize, ebx);
+      }
+    }
+  } else {
     __ ret(0);
-  } else {
-    __ Ret(pop_count * kPointerSize, ebx);
   }
 }