Merge pull request !25710 from lilei/modify_pangu_model_for_master

Merge pull request !23325 from changzherui/mod_3d_format

Merge pull request !19458 from lichen/fix_pipeline_split_bug

Merge pull request !18548 from dinglinhe/code_docs_dlh_ms_I3W537

fix grad_freeeze bug

acc update

add split point

fix eval getnext failed and fix acc bug.

update acc.

fix acc bug.

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

From: @linqingke
Reviewed-by: @guoqi1024,@xu-yfei
Signed-off-by: @guoqi1024

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

From: @wangnan39
Reviewed-by: @kingxian,@zh_qh
Signed-off-by: @kingxian

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)
```