From: @hwhewei
Reviewed-by: @zhunaipan,@zh_qh
Signed-off-by: @zh_qh

The basic idea is: exploits data dependency to control the execution order
of side-effect operations, and keep the semantics of ANF unchanged.

The ControlDepend primitive is removed and there are two primitives added:

1. UpdateState:
```
  a = Assign(para, value)
```
became:
```
  a = Assign(para, value, u)
  u = UpdateState(u, a)
```

2. Load:
```
  x = Add(para, value)
```
became:
```
  p = Load(para, u)
  x = Add(p, value)
  u = UpdateState(u, p)
```

From: @wangnan39
Reviewed-by: 
Signed-off-by:

From: @jinyaohui
Reviewed-by: 
Signed-off-by:

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @yuchaojie
Reviewed-by: 
Signed-off-by:

From: @liangzhibo
Reviewed-by: @ginfung,@zh_qh
Signed-off-by: @zh_qh

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @liangzhibo
Reviewed-by: 
Signed-off-by:

From: @yuchaojie
Reviewed-by: @kingxian,@zhoufeng54
Signed-off-by: @kingxian

From: @TFbunny
Reviewed-by: @tom__chen,@tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @jiangzg001
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @yuan_shen_zhou
Reviewed-by: 
Signed-off-by:

From: @lianliguang
Reviewed-by: @zh_qh,@zh_qh,@chujinjin
Signed-off-by: @zh_qh,@zh_qh

From: @jiangzg001
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @david-he91
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

A minor change in sigmoidGradGrad operation (non-functional change).

From: @gong_zi_yan
Reviewed-by: @stsuteng,@yao_yf,@kisnwang
Signed-off-by: @stsuteng

From: @wangshuide2020
Reviewed-by: @liangchenghui,@linqingke
Signed-off-by: @liangchenghui

From: @gong_zi_yan
Reviewed-by: 
Signed-off-by:

From: @lichen666
Reviewed-by: @stsuteng
Signed-off-by: @stsuteng

From: @chenfei52
Reviewed-by: @ginfung,@zh_qh
Signed-off-by: @zh_qh