Switch CallConstructStub to take new.target in register.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 90a72ada64bb785e5f433e0ce9a82d608ceef496..c9eb0fbf2a36a89ea6b4985b89a7b22ee8770a7e 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -2780,7 +2780,8 @@ 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)

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

Please change t0 -> a4

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

Done.

   Label slow, non_function_call;
   // Check that the function is not a smi.
   __ JumpIfSmi(a1, &non_function_call);
@@ -2789,7 +2790,13 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
   __ Branch(&slow, ne, a4, Operand(JS_FUNCTION_TYPE));

[paul.l..., 2015/07/14 16:58:18]

Please change these 3 uses of a4 -> a5

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

Done.

 
   if (RecordCallTarget()) {
+    if (IsSuperConstructorCall()) {
+      __ push(t0);

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

Please use a4 here and in pop() below.

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

Done.

+    }
     GenerateRecordCallTarget(masm);
+    if (IsSuperConstructorCall()) {
+      __ pop(t0);
+    }
 
     __ dsrl(at, a3, 32 - kPointerSizeLog2);
     __ Daddu(a5, a2, at);
@@ -2814,11 +2821,7 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
 
   // Pass function as original constructor.
   if (IsSuperConstructorCall()) {
-    __ li(a4, Operand(1 * kPointerSize));
-    __ dsll(at, a0, kPointerSizeLog2);
-    __ daddu(a4, a4, at);
-    __ daddu(at, sp, a4);
-    __ ld(a3, MemOperand(at, 0));
+    __ mov(a3, t0);

[paul.l..., 2015/07/14 16:58:18]

t0 -> a4

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

Done.

   } else {
     __ mov(a3, a1);
   }