Contribution of PowerPC port (continuation of 422063005) - PPC dir update

src/ppc/deoptimizer-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.
 
 #include "src/v8.h"
 
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen.h"
 #include "src/safepoint-table.h"
 
 namespace v8 {
 namespace internal {
 
 const int Deoptimizer::table_entry_size_ = 8;
 
 
 int Deoptimizer::patch_size() {
 #if V8_TARGET_ARCH_PPC64
   const int kCallInstructionSizeInWords = 7;
 #else
   const int kCallInstructionSizeInWords = 4;
 #endif
   return kCallInstructionSizeInWords * Assembler::kInstrSize;
 }
 
 
+void Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(Handle<Code> code) {
+  // Empty because there is no need for relocation information for the code
+  // patching in Deoptimizer::PatchCodeForDeoptimization below.
+}
+
+
 void Deoptimizer::PatchCodeForDeoptimization(Isolate* isolate, Code* code) {
   Address code_start_address = code->instruction_start();
 
   // Invalidate the relocation information, as it will become invalid by the
   // code patching below, and is not needed any more.
   code->InvalidateRelocation();
 
   if (FLAG_zap_code_space) {
     // Fail hard and early if we enter this code object again.
     byte* pointer = code->FindCodeAgeSequence();
@@ skipping 41 matching lines @@
     prev_call_address = call_address;
 #endif
   }
 }
 
 
 void Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) {
   // Set the register values. The values are not important as there are no
   // callee saved registers in JavaScript frames, so all registers are
   // spilled. Registers fp and sp are set to the correct values though.
+  // We ensure the values are Smis to avoid confusing the garbage
+  // collector in the event that any values are retreived and stored
+  // elsewhere.
 
   for (int i = 0; i < Register::kNumRegisters; i++) {
-    input_->SetRegister(i, i * 4);
+    input_->SetRegister(i, reinterpret_cast<intptr_t>(Smi::FromInt(i)));
   }
   input_->SetRegister(sp.code(), reinterpret_cast<intptr_t>(frame->sp()));
   input_->SetRegister(fp.code(), reinterpret_cast<intptr_t>(frame->fp()));
   for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     input_->SetDoubleRegister(i, 0.0);
   }
 
   // Fill the frame content from the actual data on the frame.
   for (unsigned i = 0; i < input_->GetFrameSize(); i += kPointerSize) {
     input_->SetFrameSlot(
@@ skipping 248 matching lines @@
 #else
   // No out-of-line constant pool support.
   UNREACHABLE();
 #endif
 }
 
 
 #undef __
 }
 }  // namespace v8::internal