[stubs] Unify (and optimize) implementation of ToObject.

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 61508ee596bf44bf49248e3f2fed3530d40561f8..a8e52ec39849435b617210acacd93f249ec28c46 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -103,6 +103,14 @@ void ToNumberDescriptor::InitializePlatformSpecific(
 }
 
 
+void ToObjectDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // ToObjectStub invokes a function, and therefore needs a context.
+  Register registers[] = {eax};

[mvstanton, 2015/07/31 11:04:57]

You could also reduce the number of platform dependent lines by defining
ToObjectDescriptor::ReceiverRegister() { return eax; }

in this file, and then InitializePlatformSpecific() over in
interface-descriptors.cc.

[Benedikt Meurer, 2015/07/31 11:18:10]

Done. Thanks for the pointer.

+  data->InitializePlatformSpecific(arraysize(registers), registers, nullptr);
+}
+
+
 void NumberToStringDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {eax};