Switch CallConstructStub to take new.target in register.

src/mips/interface-descriptors-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/interface-descriptors.h"
 
@@ skipping 151 matching lines @@
   Register registers[] = {a1, a3, a2};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void CallConstructDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // a0 : number of arguments
   // a1 : the function to call
   // a2 : feedback vector
-  // a3 : (only if a2 is not the megamorphic symbol) slot in feedback
-  //      vector (Smi)
+  // a3 : slot in feedback vector (Smi, for RecordCallTarget)
+  // t0 : original constructor (for IsSuperConstructorCall)
   // TODO(turbofan): So far we don't gather type feedback and hence skip the
   // slot parameter, but ArrayConstructStub needs the vector to be undefined.
-  Register registers[] = {a0, a1, a2};
+  Register registers[] = {a0, a1, t0, a2};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
 
 void RegExpConstructResultDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {a2, a1, a0};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
@@ skipping 170 matching lines @@
       a1,  // math rounding function
       a3,  // vector slot id
       a2,  // type vector
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS