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Re: build_x_binary_op (ARRAY_REF ?!



On Apr 19, 2006, at 4:48 PM, Alexey Starovoytov wrote:


Hi,

Is this a bug that we were lucky not to hit?

cp/pt.c:
return build_x_binary_op (ARRAY_REF, op1, RECUR (TREE_OPERAND (t, 1)),
/*overloaded_p=*/NULL);
tree
build_x_binary_op (enum tree_code code, tree arg1, tree arg2,
bool *overloaded_p)
{
...
return build_min_nt (code, arg1, arg2);
...
return build_min_non_dep (code, expr, orig_arg1, orig_arg2);
}


the 'code' for build_min* will still be ARRAY_REF, so both functions
have a chance to init ARRAY_REF with some junk:
  for (i = 0; i < length; i++)
    {
      tree x = va_arg (p, tree);
      TREE_OPERAND (t, i) = x;
    }

The returned memory is memset in make_node in tree.c or thereabouts. IIRC.

--Dan


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