[all-commits] [llvm/llvm-project] c44860: [Flang][OpenMP] Disable lowering of omp.simd reduc...

[Sergio Afonso via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c44860c8d2582abd88794267b4fa0fa953bbef80
      https://github.com/llvm/llvm-project/commit/c44860c8d2582abd88794267b4fa0fa953bbef80
  Author: Sergio Afonso <safonsof at amd.com>
  Date:   2024-10-21 (Mon, 21 Oct 2024)

  Changed paths:
    M flang/lib/Lower/OpenMP/OpenMP.cpp

  Log Message:
  -----------
  [Flang][OpenMP] Disable lowering of omp.simd reductions in composites (#112686)

Currently, the `omp.simd` operation is ignored during MLIR to LLVM IR
translation when it takes part in a composite construct. One consequence
of this limitation is that any entry block arguments defined by that
operation will trigger a compiler crash if they are used anywhere, as
they are not bound to an LLVM IR value.

A previous PR introducing support for the `reduction` clause resulted in
the creation and use of entry block arguments attached to the `omp.simd`
operation, causing compiler crashes on 'do simd reduction(...)'
constructs.

This patch disables Flang lowering of simd reductions in 'do simd'
constructs to avoid triggering these errors while translation to LLVM IR
is still incomplete.



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