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(pushdecl): Use lookup_name_current_level_global instead of lookup_name for extern references.

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(pushdecl): Use lookup_name_current_level_global instead
of lookup_name for extern references.  Don't return duplicate decl
if it came from the global binding level, and there exists a
conflicting decl in an intervening block.
(lookup_name_current_level_global); New function.

From-SVN: r7189
This commit is contained in:
Jim Wilson 1994-05-02 13:48:11 -07:00
parent 53dd962232
commit e32fe22499
1 changed files with 30 additions and 2 deletions
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32
gcc/c-decl.c
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@ -1828,7 +1828,7 @@ pushdecl (x)
int line;
if (DECL_EXTERNAL (x) && TREE_PUBLIC (x))
t = lookup_name (name);
t = lookup_name_current_level_global (name);
else
t = lookup_name_current_level (name);
if (t != 0 && t == error_mark_node)
@ -1869,7 +1869,12 @@ pushdecl (x)
IDENTIFIER_POINTER (name));
}
return t;
/* If this is a global decl, and there exists a conflicting local
decl in a parent block, then we can't return as yet, because we
need to register this decl in the current binding block. */
if (! DECL_EXTERNAL (x) || ! TREE_PUBLIC (x)
|| lookup_name (name) == t)
return t;
}
/* If we are processing a typedef statement, generate a whole new
@ -2609,6 +2614,29 @@ lookup_name_current_level (name)
return t;
}
/* Similar to `lookup_name_current_level' but also look at the global binding
level. */
tree
lookup_name_current_level_global (name)
tree name;
{
register tree t = 0;
if (current_binding_level == global_binding_level)
return IDENTIFIER_GLOBAL_VALUE (name);
if (IDENTIFIER_LOCAL_VALUE (name) != 0)
for (t = current_binding_level->names; t; t = TREE_CHAIN (t))
if (DECL_NAME (t) == name)
break;
if (t == 0)
t = IDENTIFIER_GLOBAL_VALUE (name);
return t;
}
/* Create the predefined scalar types of C,
and some nodes representing standard constants (0, 1, (void *)0).