[all-commits] [llvm/llvm-project] 27dce1: [flang][OpenMP] Resolve private array source from ...

[Caroline Newcombe via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 27dce1908288eb57ce90b7c42fb7046260f39731
      https://github.com/llvm/llvm-project/commit/27dce1908288eb57ce90b7c42fb7046260f39731
  Author: Caroline Newcombe <caroline.newcombe at hpe.com>
  Date:   2026-07-14 (Tue, 14 Jul 2026)

  Changed paths:
    M flang/lib/Optimizer/Analysis/AliasAnalysis.cpp
    A flang/test/Analysis/AliasAnalysis/alias-analysis-omp-private-boxed-wsloop.mlir
    A flang/test/Analysis/AliasAnalysis/alias-analysis-omp-private-unboxed-wsloop.mlir

  Log Message:
  -----------
  [flang][OpenMP] Resolve private array source from block-arg owner in alias analysis (#208227)

Part of #208086. `fir::AliasAnalysis::getSource` fails to recognize an
OpenMP private array as an `Allocate` source when its `hlfir.declare` is
nested inside an omp.loop_nest, and conservatively returns `MayAlias`.
This changes `getSource` to resolve the clause-carrying OpenMP op from
the private block argument's owner region, so the private is correctly
classified and does not spuriously alias other objects. Assisted-by: Copilot



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