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

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 648bb734538681ea2307499f4511005aa6da3dff..7d283f5998326c9c2760cf568c5757523bf5b3a8 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -188,14 +188,21 @@ bool LCodeGen::GeneratePrologue() {
   if (NeedsEagerFrame()) {
     ASSERT(!frame_is_built_);
     frame_is_built_ = true;
-    __ push(ebp);  // Caller's frame pointer.
-    __ mov(ebp, esp);
-    info()->AddNoFrameRange(0, masm_->pc_offset());
-    __ push(esi);  // Callee's context.
-    if (info()->IsStub()) {
-      __ push(Immediate(Smi::FromInt(StackFrame::STUB)));
+    if (FLAG_optimize_for_size && FLAG_age_code && !info()->IsStub()) {
+        // Pre-age the code.
+      __ call(isolate()->builtins()->MarkCodeAsExecutedOnce(),
+             RelocInfo::CODE_AGE_SEQUENCE);
+      __ Nop(kNoCodeAgeSequenceLength - Assembler::kCallInstructionLength);
     } else {
-      __ push(edi);  // Callee's JS function.
+      __ push(ebp);  // Caller's frame pointer.
+      __ mov(ebp, esp);
+      info()->AddNoFrameRange(0, masm_->pc_offset());
+      __ push(esi);  // Callee's context.
+      if (info()->IsStub()) {
+        __ push(Immediate(Smi::FromInt(StackFrame::STUB)));
+      } else {
+        __ push(edi);  // Callee's JS function.
+      }
     }
   }