(expand_builtin, case BUILT_IN_NEXT_ARG): Test whether an argunment
has been passed to __builtin_next_arg; warn if not. From-SVN: r6994
This commit is contained in:
parent
18e2b1c06e
commit
e4493c0410
17
gcc/expr.c
17
gcc/expr.c
|
@ -6961,8 +6961,6 @@ expand_builtin (exp, target, subtarget, mode, ignore)
|
|||
case BUILT_IN_NEXT_ARG:
|
||||
{
|
||||
tree fntype = TREE_TYPE (current_function_decl);
|
||||
tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
|
||||
tree arg;
|
||||
|
||||
if (TYPE_ARG_TYPES (fntype) == 0
|
||||
|| (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
|
||||
|
@ -6973,9 +6971,13 @@ expand_builtin (exp, target, subtarget, mode, ignore)
|
|||
return const0_rtx;
|
||||
}
|
||||
|
||||
arg = TREE_VALUE (arglist);
|
||||
/* Strip off all nops for the sake of the comparison. This is not
|
||||
quite the same as STRIP_NOPS. It does more. */
|
||||
if (arglist)
|
||||
{
|
||||
tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
|
||||
tree arg = TREE_VALUE (arglist);
|
||||
|
||||
/* Strip off all nops for the sake of the comparison. This
|
||||
is not quite the same as STRIP_NOPS. It does more. */
|
||||
while (TREE_CODE (arg) == NOP_EXPR
|
||||
|| TREE_CODE (arg) == CONVERT_EXPR
|
||||
|| TREE_CODE (arg) == NON_LVALUE_EXPR)
|
||||
|
@ -6983,6 +6985,11 @@ expand_builtin (exp, target, subtarget, mode, ignore)
|
|||
if (arg != last_parm)
|
||||
warning ("second parameter of `va_start' not last named argument");
|
||||
}
|
||||
else
|
||||
/* Evidently an out of date version of <stdarg.h>; can't validate
|
||||
va_start's second argument, but can still work as intended. */
|
||||
warning ("`__builtin_next_arg' called without an argument");
|
||||
}
|
||||
|
||||
return expand_binop (Pmode, add_optab,
|
||||
current_function_internal_arg_pointer,
|
||||
|
|
Loading…
Reference in New Issue