[all-commits] [llvm/llvm-project] 82e1e4: [flang][runtime] Treatment of NaN in MAXVAL/MAXLOC...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 82e1e412e3249e15908c3f916eeaa04b96d4b453
      https://github.com/llvm/llvm-project/commit/82e1e412e3249e15908c3f916eeaa04b96d4b453
  Author: Peter Klausler <35819229+klausler at users.noreply.github.com>
  Date:   2024-01-15 (Mon, 15 Jan 2024)

  Changed paths:
    M flang/docs/Extensions.md
    M flang/lib/Evaluate/fold-character.cpp
    M flang/lib/Evaluate/fold-integer.cpp
    M flang/lib/Evaluate/fold-logical.cpp
    M flang/lib/Evaluate/fold-real.cpp
    M flang/lib/Evaluate/fold-reduction.h
    M flang/runtime/extrema.cpp
    M flang/runtime/reduction-templates.h
    M flang/test/Evaluate/fold-findloc.f90
    M flang/test/Evaluate/folding20.f90

  Log Message:
  -----------
  [flang][runtime] Treatment of NaN in MAXVAL/MAXLOC/MINVAL/MINLOC (#76999)

Detect NaN elements in data and handle them like gfortran does (at
runtime); namely, NaN can be returned if all the data are NaNs, but any
non-NaN value is preferable. Ensure that folding returns the same
results as runtime computation.

Fixes llvm-test-suite/Fortran/gfortran/regression/maxloc_2.f90 (and
probably others).