[all-commits] [llvm/llvm-project] d01e2e: [flang][OpenMP] Reject END DO on construct that cr...

[Krzysztof Parzyszek via All-commits]

  Branch: refs/heads/users/kparzysz/f02-complain-about-enddo
  Home:   https://github.com/llvm/llvm-project
  Commit: d01e2e9e06ba5c641b07f2fd47f2f8bea93e78be
      https://github.com/llvm/llvm-project/commit/d01e2e9e06ba5c641b07f2fd47f2f8bea93e78be
  Author: Krzysztof Parzyszek <Krzysztof.Parzyszek at amd.com>
  Date:   2025-11-26 (Wed, 26 Nov 2025)

  Changed paths:
    M flang/include/flang/Parser/parse-tree.h
    M flang/lib/Semantics/canonicalize-do.cpp
    M flang/lib/Semantics/check-omp-loop.cpp
    M flang/test/Parser/OpenMP/atomic-label-do.f90
    M flang/test/Parser/OpenMP/cross-label-do.f90
    M flang/test/Semantics/OpenMP/loop-association.f90

  Log Message:
  -----------
  [flang][OpenMP] Reject END DO on construct that crosses label-DO

In a label-DO construct where two or more loops share the same teminator,
an OpenMP construct must enclose all the loops if an end-directive is
present. E.g.

```
  do 100 i = 1,10
!$omp do
    do 100 j = 1,10
    100 continue
!$omp end do    ! Error, but ok if this line is removed
```

OpenMP 5.1 and later no longer has this restriction.

Fixes https://github.com/llvm/llvm-project/issues/169536.



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