PPC: Fix arguments object stubs for large arrays.

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/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4580 matching lines @@
   Label no_rest_parameters;
   __ LoadP(r5, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(ip, MemOperand(r5, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ bne(&no_rest_parameters);
 
   // Check if the arguments adaptor frame contains more arguments than
   // specified by the function's internal formal parameter count.
   Label rest_parameters;
   __ LoadP(r3, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ LoadP(r4, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
+  __ LoadP(r6, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
   __ LoadWordArith(
-      r4, FieldMemOperand(r4, SharedFunctionInfo::kFormalParameterCountOffset));
+      r6, FieldMemOperand(r6, SharedFunctionInfo::kFormalParameterCountOffset));
 #if V8_TARGET_ARCH_PPC64
-  __ SmiTag(r4);
+  __ SmiTag(r6);
 #endif
-  __ sub(r3, r3, r4, LeaveOE, SetRC);
+  __ sub(r3, r3, r6, LeaveOE, SetRC);
   __ bgt(&rest_parameters, cr0);
 
   // Return an empty rest parameter array.
   __ bind(&no_rest_parameters);
   {
     // ----------- S t a t e -------------
     //  -- cp : context
     //  -- lr : return address
     // -----------------------------------
 
@@ skipping 26 matching lines @@
   __ bind(&rest_parameters);
   {
     // Compute the pointer to the first rest parameter (skippping the receiver).
     __ SmiToPtrArrayOffset(r9, r3);
     __ add(r5, r5, r9);
     __ addi(r5, r5, Operand(StandardFrameConstants::kCallerSPOffset));
 
     // ----------- S t a t e -------------
     //  -- cp : context
     //  -- r3 : number of rest parameters (tagged)
+    //  -- r4 : function
     //  -- r5 : pointer just past first rest parameters
     //  -- r9 : size of rest parameters
     //  -- lr : return address
     // -----------------------------------
 
     // Allocate space for the rest parameter array plus the backing store.
     Label allocate, done_allocate;
-    __ mov(r4, Operand(JSArray::kSize + FixedArray::kHeaderSize));
-    __ add(r4, r4, r9);
-    __ Allocate(r4, r6, r7, r8, &allocate, NO_ALLOCATION_FLAGS);
+    __ mov(r10, Operand(JSArray::kSize + FixedArray::kHeaderSize));
+    __ add(r10, r10, r9);
+    __ Allocate(r10, r6, r7, r8, &allocate, NO_ALLOCATION_FLAGS);
     __ bind(&done_allocate);
 
     // Setup the elements array in r6.
     __ LoadRoot(r4, Heap::kFixedArrayMapRootIndex);
     __ StoreP(r4, FieldMemOperand(r6, FixedArray::kMapOffset), r0);
     __ StoreP(r3, FieldMemOperand(r6, FixedArray::kLengthOffset), r0);
     __ addi(r7, r6,
             Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize));
     {
       Label loop;
@@ skipping 10 matching lines @@
     __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, r4);
     __ StoreP(r4, MemOperand(r7, JSArray::kMapOffset));
     __ LoadRoot(r4, Heap::kEmptyFixedArrayRootIndex);
     __ StoreP(r4, MemOperand(r7, JSArray::kPropertiesOffset));
     __ StoreP(r6, MemOperand(r7, JSArray::kElementsOffset));
     __ StoreP(r3, MemOperand(r7, JSArray::kLengthOffset));
     STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize);
     __ addi(r3, r7, Operand(kHeapObjectTag));
     __ Ret();
 
-    // Fall back to %AllocateInNewSpace.
+    // Fall back to %AllocateInNewSpace (if not too big).
+    Label too_big_for_new_space;
     __ bind(&allocate);
+    __ cmpi(r10, Operand(Page::kMaxRegularHeapObjectSize));
+    __ bgt(&too_big_for_new_space);
     {
       FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-      __ SmiTag(r4);
-      __ Push(r3, r5, r4);
+      __ SmiTag(r10);
+      __ Push(r3, r5, r10);
       __ CallRuntime(Runtime::kAllocateInNewSpace);
       __ mr(r6, r3);
       __ Pop(r3, r5);
     }
     __ b(&done_allocate);
+
+    // Fall back to %NewRestParameter.
+    __ bind(&too_big_for_new_space);
+    __ push(r4);
+    __ TailCallRuntime(Runtime::kNewRestParameter);
   }
 }
 
 void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r4 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
@@ skipping 285 matching lines @@
     __ bind(&ok);
   }
 
   // Check if we have an arguments adaptor frame below the function frame.
   Label arguments_adaptor, arguments_done;
   __ LoadP(r6, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(ip, MemOperand(r6, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ beq(&arguments_adaptor);
   {
-    __ LoadP(r4, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
+    __ LoadP(r7, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
     __ LoadWordArith(
         r3,
-        FieldMemOperand(r4, SharedFunctionInfo::kFormalParameterCountOffset));
+        FieldMemOperand(r7, SharedFunctionInfo::kFormalParameterCountOffset));
 #if V8_TARGET_ARCH_PPC64
     __ SmiTag(r3);
 #endif
     __ SmiToPtrArrayOffset(r9, r3);
     __ add(r5, r5, r9);
   }
   __ b(&arguments_done);
   __ bind(&arguments_adaptor);
   {
     __ LoadP(r3, MemOperand(r6, ArgumentsAdaptorFrameConstants::kLengthOffset));
     __ SmiToPtrArrayOffset(r9, r3);
     __ add(r5, r6, r9);
   }
   __ bind(&arguments_done);
   __ addi(r5, r5, Operand(StandardFrameConstants::kCallerSPOffset));
 
   // ----------- S t a t e -------------
   //  -- cp : context
   //  -- r3 : number of rest parameters (tagged)
+  //  -- r4 : function
   //  -- r5 : pointer just past first rest parameters
   //  -- r9 : size of rest parameters
   //  -- lr : return address
   // -----------------------------------
 
   // Allocate space for the strict arguments object plus the backing store.
   Label allocate, done_allocate;
-  __ mov(r4, Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize));
-  __ add(r4, r4, r9);
-  __ Allocate(r4, r6, r7, r8, &allocate, NO_ALLOCATION_FLAGS);
+  __ mov(r10,
+         Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize));
+  __ add(r10, r10, r9);
+  __ Allocate(r10, r6, r7, r8, &allocate, NO_ALLOCATION_FLAGS);
   __ bind(&done_allocate);
 
   // Setup the elements array in r6.
   __ LoadRoot(r4, Heap::kFixedArrayMapRootIndex);
   __ StoreP(r4, FieldMemOperand(r6, FixedArray::kMapOffset), r0);
   __ StoreP(r3, FieldMemOperand(r6, FixedArray::kLengthOffset), r0);
   __ addi(r7, r6,
           Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize));
   {
     Label loop, done_loop;
@@ skipping 12 matching lines @@
   __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, r4);
   __ StoreP(r4, MemOperand(r7, JSStrictArgumentsObject::kMapOffset));
   __ LoadRoot(r4, Heap::kEmptyFixedArrayRootIndex);
   __ StoreP(r4, MemOperand(r7, JSStrictArgumentsObject::kPropertiesOffset));
   __ StoreP(r6, MemOperand(r7, JSStrictArgumentsObject::kElementsOffset));
   __ StoreP(r3, MemOperand(r7, JSStrictArgumentsObject::kLengthOffset));
   STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize);
   __ addi(r3, r7, Operand(kHeapObjectTag));
   __ Ret();
 
-  // Fall back to %AllocateInNewSpace.
+  // Fall back to %AllocateInNewSpace (if not too big).
+  Label too_big_for_new_space;
   __ bind(&allocate);
+  __ cmpi(r10, Operand(Page::kMaxRegularHeapObjectSize));
+  __ bgt(&too_big_for_new_space);
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-    __ SmiTag(r4);
-    __ Push(r3, r5, r4);
+    __ SmiTag(r10);
+    __ Push(r3, r5, r10);
     __ CallRuntime(Runtime::kAllocateInNewSpace);
     __ mr(r6, r3);
     __ Pop(r3, r5);
   }
   __ b(&done_allocate);
+
+  // Fall back to %NewStrictArguments.
+  __ bind(&too_big_for_new_space);
+  __ push(r4);
+  __ TailCallRuntime(Runtime::kNewStrictArguments);
 }
 
 void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context = cp;
   Register result = r3;
   Register slot = r5;
 
   // Go up the context chain to the script context.
   for (int i = 0; i < depth(); ++i) {
     __ LoadP(result, ContextMemOperand(context, Context::PREVIOUS_INDEX));
@@ skipping 499 matching lines @@
       fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize);
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC