PPC: [Interpreter] Use FastNewSloppyArguments when possible.

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 4920 matching lines @@
 }
 
 void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r4 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
   __ AssertFunction(r4);
 

[MTBrandyberry, 2016/04/25 15:46:47]

Copy over the comment for this new block as well.

+  {
+    Label loop, loop_entry;
+    __ mr(r10, fp);
+    __ b(&loop_entry);
+    __ bind(&loop);
+    __ LoadP(r10, MemOperand(r10, StandardFrameConstants::kCallerFPOffset));
+    __ bind(&loop_entry);
+    __ LoadP(ip, MemOperand(r10, StandardFrameConstants::kFunctionOffset));
+    __ cmp(ip, r4);
+    __ bne(&loop);
+  }
+
+
   // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub.
   __ LoadP(r5, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
   __ LoadWordArith(
       r5, FieldMemOperand(r5, SharedFunctionInfo::kFormalParameterCountOffset));
 #if V8_TARGET_ARCH_PPC64
   __ SmiTag(r5);
 #endif
   __ SmiToPtrArrayOffset(r6, r5);
-  __ add(r6, fp, r6);
+  __ add(r6, r10, r6);
   __ addi(r6, r6, Operand(StandardFrameConstants::kCallerSPOffset));
 
   // r4 : function
   // r5 : number of parameters (tagged)
   // r6 : parameters pointer
+  // r10 : JavaScript frame pointer
   // Registers used over whole function:
   // r8 : arguments count (tagged)
   // r9 : mapped parameter count (tagged)
 
   // Check if the calling frame is an arguments adaptor frame.
   Label adaptor_frame, try_allocate, runtime;
-  __ LoadP(r7, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+  __ LoadP(r7, MemOperand(r10, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(r3, MemOperand(r7, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ CmpSmiLiteral(r3, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ beq(&adaptor_frame);
 
   // No adaptor, parameter count = argument count.
   __ mr(r8, r5);
   __ mr(r9, r5);
   __ b(&try_allocate);
 
   // We have an adaptor frame. Patch the parameters pointer.
@@ skipping 828 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