Enable preaging of code objects when --optimize-for-size.

src/ia32/assembler-ia32-inl.h

Index: src/ia32/assembler-ia32-inl.h
diff --git a/src/ia32/assembler-ia32-inl.h b/src/ia32/assembler-ia32-inl.h
index 5a35b207f72db72a94bb20a2a8a8b5ef5b1f9127..05cc23a71d952cb4e4727d2237c2780c06faa0d5 100644
--- a/src/ia32/assembler-ia32-inl.h
+++ b/src/ia32/assembler-ia32-inl.h
@@ -47,6 +47,7 @@ namespace internal {
 
 
 static const byte kCallOpcode = 0xE8;
+static const int kNoCodeAgeSequenceLength = 5;
 
 
 // The modes possibly affected by apply must be in kApplyMask.
@@ -190,6 +191,13 @@ void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode mode) {
 }
 
 
+Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  ASSERT(*pc_ == kCallOpcode);
+  return Memory::Object_Handle_at(pc_ + 1);
+}
+
+
 Code* RelocInfo::code_age_stub() {
   ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
   ASSERT(*pc_ == kCallOpcode);
@@ -379,7 +387,8 @@ void Assembler::emit(Handle<Object> handle) {
 void Assembler::emit(uint32_t x, RelocInfo::Mode rmode, TypeFeedbackId id) {
   if (rmode == RelocInfo::CODE_TARGET && !id.IsNone()) {
     RecordRelocInfo(RelocInfo::CODE_TARGET_WITH_ID, id.ToInt());
-  } else if (!RelocInfo::IsNone(rmode)) {
+  } else if (!RelocInfo::IsNone(rmode)
+      && rmode != RelocInfo::CODE_AGE_SEQUENCE) {
     RecordRelocInfo(rmode);
   }
   emit(x);