Switch CallConstructStub to take new.target in register.

src/mips/code-stubs-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/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 2725 matching lines @@
 
 void CallFunctionStub::Generate(MacroAssembler* masm) {
   CallFunctionNoFeedback(masm, argc(), NeedsChecks(), CallAsMethod());
 }
 
 
 void CallConstructStub::Generate(MacroAssembler* masm) {
   // a0 : number of arguments
   // a1 : the function to call
   // a2 : feedback vector
-  // a3 : (only if a2 is not undefined) slot in feedback vector (Smi)
+  // a3 : slot in feedback vector (Smi, for RecordCallTarget)
+  // t0 : original constructor (for IsSuperConstructorCall)
   Label slow, non_function_call;
 
   // Check that the function is not a smi.
   __ JumpIfSmi(a1, &non_function_call);
   // Check that the function is a JSFunction.
-  __ GetObjectType(a1, t0, t0);
-  __ Branch(&slow, ne, t0, Operand(JS_FUNCTION_TYPE));
+  __ GetObjectType(a1, t1, t1);
+  __ Branch(&slow, ne, t1, Operand(JS_FUNCTION_TYPE));
 
   if (RecordCallTarget()) {
+    if (IsSuperConstructorCall()) {
+      __ push(t0);
+    }
     GenerateRecordCallTarget(masm);
+    if (IsSuperConstructorCall()) {
+      __ pop(t0);
+    }
 
     __ sll(at, a3, kPointerSizeLog2 - kSmiTagSize);
     __ Addu(t1, a2, at);
     if (FLAG_pretenuring_call_new) {
       // Put the AllocationSite from the feedback vector into a2.
       // By adding kPointerSize we encode that we know the AllocationSite
       // entry is at the feedback vector slot given by a3 + 1.
       __ lw(a2, FieldMemOperand(t1, FixedArray::kHeaderSize + kPointerSize));
     } else {
       Label feedback_register_initialized;
       // Put the AllocationSite from the feedback vector into a2, or undefined.
       __ lw(a2, FieldMemOperand(t1, FixedArray::kHeaderSize));
       __ lw(t1, FieldMemOperand(a2, AllocationSite::kMapOffset));
       __ LoadRoot(at, Heap::kAllocationSiteMapRootIndex);
       __ Branch(&feedback_register_initialized, eq, t1, Operand(at));
       __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
       __ bind(&feedback_register_initialized);
     }
 
     __ AssertUndefinedOrAllocationSite(a2, t1);
   }
 
   // Pass function as original constructor.
   if (IsSuperConstructorCall()) {
-    __ li(t0, Operand(1 * kPointerSize));
-    __ sll(at, a0, kPointerSizeLog2);
-    __ Addu(t0, t0, Operand(at));
-    __ Addu(at, sp, Operand(t0));
-    __ lw(a3, MemOperand(at, 0));
+    __ mov(a3, t0);
   } else {
     __ mov(a3, a1);
   }
 
   // Jump to the function-specific construct stub.
   Register jmp_reg = t0;
   __ lw(jmp_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   __ lw(jmp_reg, FieldMemOperand(jmp_reg,
                                  SharedFunctionInfo::kConstructStubOffset));
   __ Addu(at, jmp_reg, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Jump(at);
 
   // a0: number of arguments
   // a1: called object
-  // t0: object type
+  // t1: object type
   Label do_call;
   __ bind(&slow);
-  __ Branch(&non_function_call, ne, t0, Operand(JS_FUNCTION_PROXY_TYPE));
+  __ Branch(&non_function_call, ne, t1, Operand(JS_FUNCTION_PROXY_TYPE));
   __ GetBuiltinFunction(a1, Builtins::CALL_FUNCTION_PROXY_AS_CONSTRUCTOR);
   __ jmp(&do_call);
 
   __ bind(&non_function_call);
   __ GetBuiltinFunction(a1, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR);
   __ bind(&do_call);
   // Set expected number of arguments to zero (not changing r0).
   __ li(a2, Operand(0, RelocInfo::NONE32));
   __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
            RelocInfo::CODE_TARGET);
@@ skipping 2760 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS