Relax ucobounds preconditions and fix ucobound defects#297
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bonachea wants to merge 7 commits intoBerkeleyLab:mainfrom
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Relax ucobounds preconditions and fix ucobound defects#297bonachea wants to merge 7 commits intoBerkeleyLab:mainfrom
bonachea wants to merge 7 commits intoBerkeleyLab:mainfrom
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* Accept ucobounds of size (corank - 1) when creating coarray descriptors If provided, the trailing ucobounds must still meet the specified invariants * Add coshape_epp to the coarray descriptor This new field holds the precomputed exclusive prefix product of the coshape. * Fix prif_ucobound to recompute the trailing ucobound based on current team size * Fix prif_coshape to properly account for the trailing ucobound * Use coshape_epp to accelerate prif_image_index and prif_initial_team_index
* Simplify the logic for the common case of corank == 1 * Remove some redundant arithmetic and branchs for the general case * Add a safety check for coshape overflow
New expected trailing ucobound values, and exercise optional trailing ucobound
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This PR reworks Caffeine's handling of ucobounds, fixing it to comply with F23
UCOBOUNDand deploying the ucobound relaxation on coarray descriptor creation proposed for PRIF 0.8.Fixes #296
Implements prif#154
See commit messages for details.