DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining")
DEFINE_bool(aggressive_loop_invariant_motion, true,
"aggressive motion of instructions out of loops")
-#ifdef V8_TARGET_ARCH_IA32
-DEFINE_bool(use_osr, true, "use on-stack replacement")
-#else
+#ifdef V8_TARGET_ARCH_X64
DEFINE_bool(use_osr, false, "use on-stack replacement")
+#else
+DEFINE_bool(use_osr, true, "use on-stack replacement")
#endif
DEFINE_bool(trace_osr, false, "trace on-stack replacement")
DEFINE_int(stress_runs, 0, "number of stress runs")