[Bug tree-optimization/86532] [9 Regression] Wrong code due to a wrong strlen folding starting with r262522

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86532

--- Comment #17 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Martin,

in expr.c at string_constant() there is an impossible check:

  if (TREE_CODE (init) == CONSTRUCTOR)
    {
      if (TREE_CODE (arg) != ARRAY_REF
          && TREE_CODE (arg) == COMPONENT_REF
          && TREE_CODE (arg) == MEM_REF)
        return NULL_TREE;

it can't be COMPONENT_REF and MEM_REF at the same time.