From: @peilin-wang
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @jachua
Reviewed-by: @guoqi1024,@liangchenghui
Signed-off-by: @guoqi1024

modified:   ssd/postprocess.py

From: @lijiaqi0612
Reviewed-by: @kingxian,@zh_qh
Signed-off-by: @kingxian

From: @liu_xiao_93
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @wilfchen
Reviewed-by: @limingqi107,@zhanghaibo5
Signed-off-by: @zhanghaibo5

From: @c_34
Reviewed-by: 
Signed-off-by:

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

fix ci

fix ci

fix ci

fix ci

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

1. Remove output parameter pool for ascend control flow;
2. Remove duplicate code for Switch and SwitchLayer;
3. Add 'return' attribute to label_goto that used for return;
4. Disable tail call optimize for graphs with 'recursive' flag.

From: @louie5
Reviewed-by: 
Signed-off-by:

From: @mengyuanli
Reviewed-by: @zhang_xue_tong,@hangangqiang
Signed-off-by: @zhang_xue_tong

From: @zhiqwang
Reviewed-by: @kingxian,@c_34
Signed-off-by: @kingxian,@c_34

From: @zhiqwang
Reviewed-by: @kingxian,@c_34
Signed-off-by: @kingxian,@c_34

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

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

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

From: @wilfchen
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

From: @tiancixiao
Reviewed-by: @liucunwei,@pandoublefeng
Signed-off-by: @liucunwei

From: @luoyang42
Reviewed-by: 
Signed-off-by:

From: @liu_xiao_93
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @liu_xiao_93
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

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

From: @zhiqwang
Reviewed-by: @kisnwang,@kingxian
Signed-off-by: @kingxian

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

From: @ms_yan
Reviewed-by: @liucunwei,@pandoublefeng
Signed-off-by: @liucunwei

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