PPC: Partial revert of rest parameter desugaring.

src/ppc/code-stubs-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1969 matching lines @@
   // Return.
   __ Ret();
 
   // Do the runtime call to allocate the arguments object.
   __ bind(&runtime);
   __ Push(r4, r6, r5);
   __ TailCallRuntime(Runtime::kNewStrictArguments, 3, 1);
 }
 
 
+void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
+  // Stack layout on entry.
+  //  sp[0] : language mode
+  //  sp[4] : index of rest parameter
+  //  sp[8] : number of parameters
+  //  sp[12] : receiver displacement
+
+  Label runtime;
+  __ LoadP(r5, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+  __ LoadP(r6, MemOperand(r5, StandardFrameConstants::kContextOffset));
+  __ CmpSmiLiteral(r6, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
+  __ bne(&runtime);
+
+  // Patch the arguments.length and the parameters pointer.
+  __ LoadP(r4, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset));
+  __ StoreP(r4, MemOperand(sp, 2 * kPointerSize));
+  __ SmiToPtrArrayOffset(r0, r4);
+  __ add(r6, r5, r0);
+  __ addi(r6, r6, Operand(StandardFrameConstants::kCallerSPOffset));
+  __ StoreP(r6, MemOperand(sp, 3 * kPointerSize));
+
+  __ 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
 // at compilation.
 #ifdef V8_INTERPRETED_REGEXP
   __ TailCallRuntime(Runtime::kRegExpExec, 4, 1);
 #else  // V8_INTERPRETED_REGEXP
 
   // Stack frame on entry.
   //  sp[0]: last_match_info (expected JSArray)
@@ skipping 3647 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC