[all-commits] [llvm/llvm-project] 20b4d7: Share construct contexts for variant reachability

[Chi-Chun, Chen via All-commits]

  Branch: refs/heads/users/cchen/flang-metadirective-loop-reachable-paths
  Home:   https://github.com/llvm/llvm-project
  Commit: 20b4d703ab09673c06750b676b2e561a8c0dfece
      https://github.com/llvm/llvm-project/commit/20b4d703ab09673c06750b676b2e561a8c0dfece
  Author: Chi-Chun, Chen <chichun.chen at hpe.com>
  Date:   2026-09-22 (Tue, 22 Sep 2026)

  Changed paths:
    M flang/include/flang/Semantics/openmp-utils.h
    M flang/lib/Semantics/check-omp-variant.cpp
    M flang/lib/Semantics/openmp-utils.cpp
    M flang/test/Driver/bbc-openmp-target-context.f90
    M flang/test/Semantics/OpenMP/metadirective-construct-paths.f90

  Log Message:
  -----------
  Share construct contexts for variant reachability

Use AppendDirectiveContextTraits when building reachable directive paths
so semantic checks and lowering apply the same construct-context rules.
This excludes informational directives such as ASSUME while retaining
executable loop transformations and the source order of combined constructs.

Make AppendConstructTraitsForDirective private again and add semantic
tests for TILE, UNROLL, ASSUME, and TEAMS DISTRIBUTE PARALLEL DO. These
complement the existing lowering tests. The ASSUME case detects the old
collector counting an extra position and skipping a required diagnostic.



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