[es6] Re-implement rest parameters via desugaring.

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 49647a42069474f7b959f24c732cbe5198aad776..1043fef92d318642a2e66b8e4176fb7de12870a0 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -1959,35 +1959,6 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
 }
 
 
-void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
-  // sp[0] : language mode
-  // sp[4] : index of rest parameter
-  // sp[8] : number of parameters
-  // sp[12] : receiver displacement
-  // Check if the calling frame is an arguments adaptor frame.
-
-  Label runtime;
-  __ ld(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
-  __ ld(a3, MemOperand(a2, StandardFrameConstants::kContextOffset));
-  __ Branch(&runtime, ne, a3,
-            Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-
-  // Patch the arguments.length and the parameters pointer.
-  __ ld(a1, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ sd(a1, MemOperand(sp, 2 * kPointerSize));
-  __ SmiScale(at, a1, kPointerSizeLog2);
-
-  __ Daddu(a3, a2, Operand(at));
-
-  __ Daddu(a3, a3, Operand(StandardFrameConstants::kCallerSPOffset));
-  __ sd(a3, MemOperand(sp, 3 * kPointerSize));
-
-  // Do the runtime call to allocate the arguments object.
-  __ bind(&runtime);
-  __ TailCallRuntime(Runtime::kNewRestParam, 4, 1);
-}
-
-
 void RegExpExecStub::Generate(MacroAssembler* masm) {
   // Just jump directly to runtime if native RegExp is not selected at compile
   // time or if regexp entry in generated code is turned off runtime switch or