[Bug tree-optimization/29484] New: tree-inline.c bug with local static vars

["jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

static inline __attribute__((always_inline))
void bar (void)
{
  addr:;
  static const unsigned long b __attribute__((__used__))
__attribute__((section("btable")))
    = (unsigned long) &&addr;
  asm ("" : : "m" (b));
}

void foo (void)
{
  bar ();
}

generates at -O and higher a reference to undefined local label (and has one
unused different label).
If the body of bar is instead copied into foo () and the call removed, it works
fine.
I think this is related to the
http://gcc.gnu.org/ml/gcc-patches/2005-06/msg01850.html
changes, not sure why isn't the local var remapped in:
  /* Add local vars in this inlined callee to caller.  */
  t_step = id->src_cfun->unexpanded_var_list;
  for (; t_step; t_step = TREE_CHAIN (t_step))
    {
      var = TREE_VALUE (t_step);
      if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
        cfun->unexpanded_var_list = tree_cons (NULL_TREE, var,
                                               cfun->unexpanded_var_list);
      else
        cfun->unexpanded_var_list = tree_cons (NULL_TREE, remap_decl (var, id),
                                               cfun->unexpanded_var_list);
    }
asm isn't written, but the variable IMHO still needs remapping, at least to
get the LABEL_DECL in the initializer remapped.  In C there shouldn't be a
problem with ODR, in C++ not sure what happens if initializer of some inline fn
local var has &&label in its initializer - issue an error?


-- 
           Summary: tree-inline.c bug with local static vars
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29484