Combining: t0: ch = EntryToken
Optimized legalized selection DAG: BB#4 'main:'
SelectionDAG has 14 nodes:
  t0: ch = EntryToken
  t15: i64,ch = load<LD4[%first], anyext from i32> t0, TargetFrameIndex:i64<2>, undef:i64
  t16: i64,ch = load<LD4[%second], anyext from i32> t0, TargetFrameIndex:i64<3>, undef:i64
      t9: ch = TokenFactor t15:1, t16:1
      t17: i64 = add t15, t16
    t18: ch = store<ST4[%next], trunc to i32> t9, t17, TargetFrameIndex:i64<4>, undef:i64
  t19: i64,ch = load<LD4[%second], anyext from i32> t18, TargetFrameIndex:i64<3>, undef:i64
    t20: ch = store<ST4[%first], trunc to i32> t19:1, t19, TargetFrameIndex:i64<2>, undef:i64
  t21: i64,ch = load<LD4[%next], anyext from i32> t20, TargetFrameIndex:i64<4>, undef:i64
  t22: ch = store<ST4[%second], trunc to i32> t21:1, t21, TargetFrameIndex:i64<3>, undef:i64