GitLab

* add the slice test example on gpu.

* change the gpu slice test according to comments.

* rename cpu_lowering to lowering, rename cpu_target to target, so consistent with gpu side.

* fix the format of a file CMakeLists.txt.

* Revert "change the gpu slice test according to comments."

This reverts commit 721bbb180d11811dc914d60fd8a1c91926e3f947.

* Revert "add the slice test example on gpu."

This reverts commit 68dabb05adffd429e5e5d10c3a1def2b06489f63.

* fix a format for the file doc/src/reference/targets.rst