[turbofan] Optimize JSCallConstruct in typed lowering to direct calls.

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 13e78045ec6aebec19ed34daab6e39bbe0c5cb5c..905bb688d051c4f2fd7d64b046e54e2ed940fad5 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.cc
@@ -217,6 +217,17 @@ void CallTrampolineDescriptor::InitializePlatformSpecific(
 }
 
 
+void ConstructStubDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // eax : number of arguments
+  // edx : the new target
+  // edi : the target to call
+  // ebx : allocation site or undefined
+  Register registers[] = {edi, edx, eax, ebx};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void ConstructTrampolineDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // eax : number of arguments