X87: Added CallInterfaceDescriptors to all code stubs.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index fe14b8a90f2985f84f15ce8df4630e1f780ba866..cc3d6ce0a7a3c9718d21f5a6f5f62785c923fa04 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -332,6 +332,8 @@ void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
 
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   // The key is in edx and the parameter count is in eax.
+  DCHECK(edx.is(ArgumentsAccessReadDescriptor::index()));
+  DCHECK(eax.is(ArgumentsAccessReadDescriptor::parameter_count()));
 
   // The displacement is used for skipping the frame pointer on the
   // stack. It is the offset of the last parameter (if any) relative
@@ -4283,6 +4285,7 @@ void CallApiGetterStub::Generate(MacroAssembler* masm) {
   //  -- ...
   //  -- edx                    : api_function_address
   // -----------------------------------
+  DCHECK(edx.is(ApiGetterDescriptor::function_address()));
 
   // array for v8::Arguments::values_, handler for name and pointer
   // to the values (it considered as smi in GC).