X87: [es6] Re-implement rest parameters via desugaring.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index 5dd777f1878f621b6b4305aed25b9c8b299daceb..ad7a02bdbfa00db44b26bf52bb013622b2738ba0 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -842,32 +842,6 @@ void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
 }
 
 
-void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
-  // esp[0] : return address
-  // esp[4] : language mode
-  // esp[8] : index of rest parameter
-  // esp[12] : number of parameters
-  // esp[16] : receiver displacement
-
-  // Check if the calling frame is an arguments adaptor frame.
-  Label runtime;
-  __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
-  __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
-  __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-  __ j(not_equal, &runtime);
-
-  // Patch the arguments.length and the parameters pointer.
-  __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ mov(Operand(esp, 3 * kPointerSize), ecx);
-  __ lea(edx, Operand(edx, ecx, times_2,
-                      StandardFrameConstants::kCallerSPOffset));
-  __ mov(Operand(esp, 4 * kPointerSize), edx);
-
-  __ 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