Add dynamic stack frame alignment to optimized functions with untagged doubles on the stack.

src/ia32/lithium-codegen-ia32.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 40 matching lines @@
         masm_(assembler),
         info_(info),
         current_block_(-1),
         current_instruction_(-1),
         instructions_(chunk->instructions()),
         deoptimizations_(4),
         deoptimization_literals_(8),
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
+        dynamic_frame_alignment_(false),
         deferred_(8),
         osr_pc_offset_(-1),
         deoptimization_reloc_size(),
         resolver_(this),
         expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
   // Simple accessors.
   MacroAssembler* masm() const { return masm_; }
@@ skipping 55 matching lines @@
   };
 
   bool is_unused() const { return status_ == UNUSED; }
   bool is_generating() const { return status_ == GENERATING; }
   bool is_done() const { return status_ == DONE; }
   bool is_aborted() const { return status_ == ABORTED; }
 
   int strict_mode_flag() const {
     return info()->is_strict_mode() ? kStrictMode : kNonStrictMode;
   }
+  bool dynamic_frame_alignment() const { return dynamic_frame_alignment_; }
+  void set_dynamic_frame_alignment(bool value) {
+    dynamic_frame_alignment_ = value;
+  }
 
   LChunk* chunk() const { return chunk_; }
   Scope* scope() const { return scope_; }
   HGraph* graph() const { return chunk_->graph(); }
 
   int GetNextEmittedBlock(int block);
   LInstruction* GetNextInstruction();
 
   void EmitClassOfTest(Label* if_true,
                        Label* if_false,
@@ skipping 144 matching lines @@
   CompilationInfo* const info_;
 
   int current_block_;
   int current_instruction_;
   const ZoneList<LInstruction*>* instructions_;
   ZoneList<LEnvironment*> deoptimizations_;
   ZoneList<Handle<Object> > deoptimization_literals_;
   int inlined_function_count_;
   Scope* const scope_;
   Status status_;
+  bool dynamic_frame_alignment_;
   TranslationBuffer translations_;
   ZoneList<LDeferredCode*> deferred_;
   int osr_pc_offset_;
 
   struct DeoptimizationRelocSize {
     int min_size;
     int last_pc_offset;
   };
 
   DeoptimizationRelocSize deoptimization_reloc_size;
@@ skipping 54 matching lines @@
  private:
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
   Label* external_exit_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_CODEGEN_IA32_H_