[all-commits] [llvm/llvm-project] 11576e: [flang] Delete a trailing CYCLE that is the last s...

[Kareem Ergawy via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 11576edbc8ab574ceacd9a624c08f730a5a7676b
      https://github.com/llvm/llvm-project/commit/11576edbc8ab574ceacd9a624c08f730a5a7676b
  Author: Kareem Ergawy <kergawy at nvidia.com>
  Date:   2026-09-15 (Tue, 15 Sep 2026)

  Changed paths:
    M flang/lib/Lower/PFTBuilder.cpp
    A flang/test/Lower/OpenMP/trailing-cycle.f90
    A flang/test/Lower/trailing-cycle.f90

  Log Message:
  -----------
  [flang] Delete a trailing CYCLE that is the last statement of its DO (#223399)

A CycleStmt at the end of the body of its own DoConstruct is a no-op:
branching to the EndDoStmt and falling through to it are the same thing.
Branch analysis nonetheless marks the DoConstruct unstructured, which
costs the structured form of the loop and the induction variable
semantics that later passes rely on.

Delete such a CycleStmt in the PFT. The statement must be unlabeled, so
that it is not itself a branch target, and it must name either no
construct or this one.



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