[Bug c/47980] Inefficient code for local const char arrays

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47980

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-03 21:59:50 UTC ---
I believe f could do:
  assert (arg != "aoeuaoeuaeouaeouaoeuaoeaoxbxod");
which would then fail with the proposed optimization.  It is unspecified if
two string literals with the same content are distinct objects, but foo must be
a distinct object (ok, with static const char foo[] =
"aoeuaoeuaeouaeouaoeuaoeaoxbxod"; and -fmerge-all-constants which ignores some
C requirements it doesn't have to).