[all-commits] [llvm/llvm-project] 475d18: [flang][runtime] Fix empty FINDLOC() results (#75251)

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 475d18f15db2d6925f81c39900e725e1fe28cba1
      https://github.com/llvm/llvm-project/commit/475d18f15db2d6925f81c39900e725e1fe28cba1
  Author: Peter Klausler <35819229+klausler at users.noreply.github.com>
  Date:   2023-12-26 (Tue, 26 Dec 2023)

  Changed paths:
    M flang/runtime/findloc.cpp

  Log Message:
  -----------
  [flang][runtime] Fix empty FINDLOC() results (#75251)

When FINDLOC() can't find its target value among the unmasked array
elements, it must return a zero result. Its implementation doesn't
sufficiently distinguish a zero result from a hit in an array with lower
bound(s) less than one. Fix by adding a flag to distinguish the case
with no hits from cases with hits.

Fixes llvm-test-suite/Fortran/gfortran/regression/findloc_6.f90.