PPC: [turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/ppc/code-generator-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/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 14 matching lines @@
 class PPCOperandConverter final : public InstructionOperandConverter {
  public:
   PPCOperandConverter(CodeGenerator* gen, Instruction* instr)
       : InstructionOperandConverter(gen, instr) {}
 
   size_t OutputCount() { return instr_->OutputCount(); }
 
   RCBit OutputRCBit() const {
     switch (instr_->flags_mode()) {
       case kFlags_branch:
+      case kFlags_deoptimize:
       case kFlags_set:
         return SetRC;
       case kFlags_none:
         return LeaveRC;
     }
     UNREACHABLE();
     return LeaveRC;
   }
 
   bool CompareLogical() const {
@@ skipping 1537 matching lines @@
   __ ShiftLeftImm(r0, input, Operand(kPointerSizeLog2));
   __ LoadPX(kScratchReg, MemOperand(kScratchReg, r0));
   __ Jump(kScratchReg);
 }
 
 
 void CodeGenerator::AssembleDeoptimizerCall(
     int deoptimization_id, Deoptimizer::BailoutType bailout_type) {
   Address deopt_entry = Deoptimizer::GetDeoptimizationEntry(
       isolate(), deoptimization_id, bailout_type);
+  // TODO(turbofan): We should be able to generate better code by sharing the
+  // actual final call site and just bl'ing to it here, similar to what we do
+  // in the lithium backend.
   __ Call(deopt_entry, RelocInfo::RUNTIME_ENTRY);
 }
 
 
 void CodeGenerator::AssemblePrologue() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   if (descriptor->IsCFunctionCall()) {
     __ function_descriptor();
     __ mflr(r0);
     if (FLAG_enable_embedded_constant_pool) {
@@ skipping 305 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8