PR #13920: Move collective pipeliner after post-layout opts and add a unit test #70266
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PR #13920: Move collective pipeliner after post-layout opts and add a unit test
Imported from GitHub PR openxla/xla#13920
@kaixih @frgossen This is just a rebased version of openxla/xla#12866
Copybara import of the project:
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dcf940b6f41e3e14b8e999e36055c07bf468f9a1 by shuw shuw@nvidia.com:
Move collective pipeliner after post-layout opts and add a unit test
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9a731e9ec6c84f809804776a3fba2d0b11a60294 by shuw shuw@nvidia.com:
Change to EXPECT_EQ
Merging this change closes #13920
FUTURE_COPYBARA_INTEGRATE_REVIEW=openxla/xla#13920 from wenscarl:kaixih/move_collective_pipeliner_dev_rebase 9a731e9ec6c84f809804776a3fba2d0b11a60294