[turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack.

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 c274610226e99aba784dfa58e965a401138318da..bbde90e5c4433b14418f96fb8d8973cb67a00fbb 100644
--- a/src/compiler/x87/code-generator-x87.cc
+++ b/src/compiler/x87/code-generator-x87.cc
@@ -38,15 +38,12 @@ class X87OperandConverter : public InstructionOperandConverter {
     if (op->IsRegister()) {
       DCHECK(extra == 0);
       return Operand(ToRegister(op));
-    } else if (op->IsDoubleRegister()) {
-      DCHECK(extra == 0);
-      UNIMPLEMENTED();
     }
     DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
-    // 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());
+    FrameOffset offset =
+        linkage()->GetFrameOffset(AllocatedOperand::cast(op)->index(), frame());
+    return Operand(offset.from_stack_pointer() ? esp : ebp,
+                   offset.offset() + extra);
   }
 
   Operand HighOperand(InstructionOperand* op) {
@@ -1568,6 +1565,7 @@ void CodeGenerator::AssemblePrologue() {
 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) {
@@ -1583,30 +1581,26 @@ void CodeGenerator::AssembleReturn() {
         }
       }
       __ 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.
-      int pop_count = static_cast<int>(descriptor->StackParameterCount());
-      if (pop_count == 0) {
-        __ ret(0);
-      } else {
-        __ Ret(pop_count * kPointerSize, ebx);
-      }
     }
-  } else {
+  }
+  if (pop_count == 0) {
     __ ret(0);
+  } else {
+    __ Ret(pop_count * kPointerSize, ebx);
   }
 }