add testcase of net of if by if

Merge pull request !4126 from BowenK/new_parameter

This reverts commit f3a9fbdd78.

Merge pull request !4883 from zhoufeng/xiu-ba-ge

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

Merge pull request !4843 from xychow/remove-ccsrc-common-h

Merge pull request !4698 from Giancarlo/setshape_constmult

replace frontend/operator/ops.h in backend with base/core_ops.h as
backend should not use any frontend-only primitive

Merge pull request !4614 from zhoufeng/code-compile-performance

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

Merge pull request !2969 from BowenK/fix_reduce_all

Merge pull request !4198 from thlinh/dev_Aug08_eliminate_more_redundant_Max

Merge pull request !2948 from amongo/FixControlFlow

add join for ref

adjust env eliminate to eliminate all env ops

add partial app cache

resolve while endless

fix env eliminate

support for "for while" cases

fix join shape error

Merge pull request !4396 from Kang/opt

Merge pull request !4248 from Giancarlo/pm_update_sparsetensor

Code review

Merge pull request !3696 from Giancarlo/update_adjust_allreduce

Merge pull request !3720 from thlinh/dev_July29_remove_redundant_minmax

Merge pull request !3715 from BowenK/new_pattern

if funcgraph or metafuncgraph call it recursively, then anf_node should be used as tracking_id to discriminate the first occurcance and the
recursive occurance.
add anf_node to PrimitiveAbstractClosure hash() to reduce cost of GetEvaluatorFor().

ignore the tracking_id to make cse work.

Merge pull request !3537 from riemann_penn/add_sparse_operator

Update threshold for rounding when checking expected value in input tensor node

Merge pull request !3270 from thlinh/dev_Jul17_removeSelect

Merge pull request !3453 from zichun_ye/resolve_attr_pr

Create a new pass named ValueBasedEliminate to reduce the load of Arithmetic Simplify

Code review