[crankshaft] Pass new.target to direct function calls.

src/crankshaft/mips/lithium-codegen-mips.cc

Index: src/crankshaft/mips/lithium-codegen-mips.cc
diff --git a/src/crankshaft/mips/lithium-codegen-mips.cc b/src/crankshaft/mips/lithium-codegen-mips.cc
index a82b262dbbbb86c172ec81cdb8bfb5672ef11528..fe0c1880ad66f84b8a1673ef33c41eb37af2653f 100644
--- a/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -3364,7 +3364,8 @@ void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
     // Change context.
     __ lw(cp, FieldMemOperand(function_reg, JSFunction::kContextOffset));
 
-    // Always initialize a0 to the number of actual arguments.
+    // Always initialize new target and number of actual arguments.
+    __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
     __ li(a0, Operand(arity));
 
     // Invoke function.
@@ -3772,11 +3773,13 @@ void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) {
   DCHECK(ToRegister(instr->function()).is(a1));
   DCHECK(ToRegister(instr->result()).is(v0));
 
-  __ li(a0, Operand(instr->arity()));
-
   // Change context.
   __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
 
+  // Always initialize new target and number of actual arguments.
+  __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
+  __ li(a0, Operand(instr->arity()));
+
   // Load the code entry address
   __ lw(at, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
   __ Call(at);