search for: scopednoaliasaaresult

...workload to workload, and the extent can be from a few percent to 2X. The compile time and the size of the IR increase as well. We briefly investigated the possible causes of the long compile time and the large IR size issues. For the compile-time performance, we observe: - Each alias query (ScopedNoAliasAAResult::mayAliasInScopes) involves partitioning a metadata set based on the domains of the metadata elements. One possible solution is that pre-partitioning the metadata sets and maintaining the partitions on updates can help. - Intersection of noalias sets is O(n^2) as metadata elements do not have...

...rom our last call: **** * Scalability challenges and other issues discovered with the current infrastructure (especially, perhaps, with the noalias metadata). * Issue #1: MDNode::intersect uses O(n^2) algorithm. The operation does not scale for large NoAlias sets. * Issue #2: ScopedNoAliasAAResult::mayAliasInScopes includes overhead (per query) of partitioning the input set based on the domain metadata. * Issue #3: Memory footprint of the flattened Alias.Scope or NoAlias set can be large. * Issue #4: correctness: current implementation has problems after inlining in a loop....

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