tree 9d41fad52134eef69a3150f5a40d17adc64f7b05
parent 293affba7c84811cf0896a400cf0863f59bc949d
author Michael Kruse <llvm-project@meinersbur.de> 1656539097 -0500
committer Copybara-Service <copybara-worker@google.com> 1656541374 -0700

[Polly][MatMul] Abandon dependence analysis.

The copy statements inserted by the matrix-multiplication optimization
introduce new dependencies between the copy statements and other
statements. As a result, the DependenceInfo must be recomputed.

Not recomputing them caused IslAstInfo to deduce that some loops are
parallel but cause race conditions when accessing the packed arrays.
As a result, matrix-matrix multiplication currently cannot be
parallelized.

Also see discussion at https://reviews.llvm.org/D125202

GitOrigin-RevId: 6fa65f8a98967a5d2d2a6863e0f67a40d2961905