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

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
diff --git a/src/ia32/lithium-codegen-ia32.h b/src/ia32/lithium-codegen-ia32.h
index 61563274201791d939e24d60ca745ffc50758888..5495319f2cff2e77a83b1f547180eac527e56c6e 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -58,6 +58,7 @@ class LCodeGen BASE_EMBEDDED {
         inlined_function_count_(0),
         scope_(info->scope()),
         status_(UNUSED),
+        dynamic_frame_alignment_(false),
         deferred_(8),
         osr_pc_offset_(-1),
         deoptimization_reloc_size(),
@@ -133,6 +134,10 @@ class LCodeGen BASE_EMBEDDED {
   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_; }
@@ -297,6 +302,7 @@ class LCodeGen BASE_EMBEDDED {
   int inlined_function_count_;
   Scope* const scope_;
   Status status_;
+  bool dynamic_frame_alignment_;
   TranslationBuffer translations_;
   ZoneList<LDeferredCode*> deferred_;
   int osr_pc_offset_;