[Interpreter] Support for operator new.

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index 554baa2f4498da06b967942c6387318e27392cea..fd94243cdd827cec833baa88f0266e257fe82822 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -976,6 +976,19 @@ void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) {
 }
 
 
+static void Generate_InterpreterPushArgs(MacroAssembler* masm, Register index,
+                                         Register limit, Register scratch) {
+  Label loop_header, loop_check;
+  __ b(al, &loop_check);
+  __ bind(&loop_header);
+  __ ldr(scratch, MemOperand(index, -kPointerSize, PostIndex));
+  __ push(scratch);
+  __ bind(&loop_check);
+  __ cmp(index, limit);
+  __ b(gt, &loop_header);
+}
+
+
 // static
 void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
   // ----------- S t a t e -------------
@@ -984,6 +997,7 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
   //          arguments should be consecutive above this, in the same order as
   //          they are to be pushed onto the stack.
   //  -- r1 : the target to call (can be any Object).
+  // -----------------------------------
 
   // Find the address of the last argument.
   __ add(r3, r0, Operand(1));  // Add one for receiver.
@@ -991,20 +1005,37 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
   __ sub(r3, r2, r3);
 
   // Push the arguments.
-  Label loop_header, loop_check;
-  __ b(al, &loop_check);
-  __ bind(&loop_header);
-  __ ldr(r4, MemOperand(r2, -kPointerSize, PostIndex));
-  __ push(r4);
-  __ bind(&loop_check);
-  __ cmp(r2, r3);
-  __ b(gt, &loop_header);
+  Generate_InterpreterPushArgs(masm, r2, r3, r4);
 
   // Call the target.
   __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
 }
 
 
+// static
+void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  // -- r0 : argument count (not including receiver)
+  // -- r3 : original constructor
+  // -- r1 : constructor to call
+  // -- r2 : address of the first argument
+  // -----------------------------------
+
+  // Find the address of the last argument.
+  __ mov(r4, Operand(r0, LSL, kPointerSizeLog2));
+  __ sub(r4, r2, r4);
+
+  // Push a slot for the receiver to be constructed.
+  __ push(r0);
+
+  // Push the arguments.
+  Generate_InterpreterPushArgs(masm, r2, r4, r5);
+
+  // Call the constructor with r0, r1, and r3 unmodified.
+  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CONSTRUCT_CALL);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);