[compiler] Make SFI "optimize" flag a "tier up" flag

src/builtins/ia32/builtins-ia32.cc

Index: src/builtins/ia32/builtins-ia32.cc
diff --git a/src/builtins/ia32/builtins-ia32.cc b/src/builtins/ia32/builtins-ia32.cc
index 76cdd0620e84f0acba824d130df67d6394343095..cc51777d1f5f70e0fd0b3baf3d841f42bf882252 100644
--- a/src/builtins/ia32/builtins-ia32.cc
+++ b/src/builtins/ia32/builtins-ia32.cc
@@ -1161,12 +1161,9 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   __ pop(new_target);
   __ pop(argument_count);
   __ mov(entry, FieldOperand(closure, JSFunction::kSharedFunctionInfoOffset));
-  // Is the shared function marked for optimization?
-  __ test_b(
-      FieldOperand(entry,
-                   SharedFunctionInfo::kWasMarkedForOptimizationByteOffset),
-      Immediate(
-          1 << SharedFunctionInfo::kWasMarkedForOptimizationBitWithinByte));
+  // Is the shared function marked for tier up?
+  __ test_b(FieldOperand(entry, SharedFunctionInfo::kMarkedForTierUpByteOffset),
+            Immediate(1 << SharedFunctionInfo::kMarkedForTierUpBitWithinByte));
   __ j(not_zero, &gotta_call_runtime_no_stack);
   // Is the full code valid?
   __ mov(entry, FieldOperand(entry, SharedFunctionInfo::kCodeOffset));