[runtime] First step to sanitize regexp literal creation.

src/x87/interface-descriptors-x87.cc

Index: src/x87/interface-descriptors-x87.cc
diff --git a/src/x87/interface-descriptors-x87.cc b/src/x87/interface-descriptors-x87.cc
index 6b45523424367e647fd6b0bf91562c8d2cc6d99a..09f7262333332915fc7cb2af4cf38dcb759552fe 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.cc
@@ -131,6 +131,13 @@ void TypeofDescriptor::InitializePlatformSpecific(
 }
 
 
+void FastCloneRegExpDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {edi, eax, ecx, edx};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void FastCloneShallowArrayDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {eax, ebx, ecx};