Switch CallConstructStub to take new.target in register.

src/mips64/builtins-mips64.cc

Index: src/mips64/builtins-mips64.cc
diff --git a/src/mips64/builtins-mips64.cc b/src/mips64/builtins-mips64.cc
index efecc29cc97ead61833acb9b331edfa31b34752d..4d3a593e1972f803ed0a2cc1fd786f944af32eb0 100644
--- a/src/mips64/builtins-mips64.cc
+++ b/src/mips64/builtins-mips64.cc
@@ -1497,9 +1497,7 @@ static void Generate_ConstructHelper(MacroAssembler* masm) {
     __ push(v0);  // limit
     __ mov(a1, zero_reg);  // initial index
     __ push(a1);
-    // Push newTarget and callee functions
-    __ ld(a0, MemOperand(fp, kNewTargetOffset));
-    __ push(a0);
+    // Push the constructor function as callee.
     __ ld(a0, MemOperand(fp, kFunctionOffset));
     __ push(a0);
 
@@ -1510,13 +1508,12 @@ static void Generate_ConstructHelper(MacroAssembler* masm) {
     // Use undefined feedback vector
     __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
     __ ld(a1, MemOperand(fp, kFunctionOffset));
+    __ ld(t0, MemOperand(fp, kNewTargetOffset));

[paul.l..., 2015/07/14 16:58:17]

t0 -> a4

[Michael Starzinger, 2015/07/15 07:36:36]

Done.

 
     // Call the function.
     CallConstructStub stub(masm->isolate(), SUPER_CONSTRUCTOR_CALL);
     __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
 
-    __ Drop(1);
-
     // Leave internal frame.
   }
   __ jr(ra);