* Followup to templated label bug report.
@ 1997-12-15 13:47 Lee Iverson
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From: Lee Iverson @ 1997-12-15 13:47 UTC (permalink / raw)
To: egcs; +Cc: Jason Merrill
WRT. the code in Set.instance.i, it seems that CoolSet<void*>::resize
is being instantiated inside CoolSetCoolSet<void*>::put, and thus
push_to_top_level is called. Now, the id for retry is shared between
the minimal_parse'ed versions of the two templated functions, but
maybe_push_to_top_level clears named_labels but does not clear the
individual bindings stored in IDENTIFIER_LABEL_VALUE for each label.
It seems to me that what must be done is to actually save these
bindings in maybe_push_to_top_level and then restore them in
pop_from_top_level. The patch below implements this and fixes the bug
I previously reported.
-------------------------------------------------------------------------------
Lee Iverson SRI International
leei@ai.sri.com 333 Ravenswood Ave., Menlo Park CA 94025
http://www.ai.sri.com/~leei/ (650) 859-3307
1997-12-15 Lee Iverson <leei@Canada.AI.SRI.COM>
* decl.c (struct saved_scope): Add label_bindings component for
save/restore of label bindings.
(maybe_push_to_top_level): Save label bindings in named_labels to
label_bindings.
(pop_from_top_level): Restore named_labels from label_bindings.
*** decl.c.~1~ Sat Dec 6 16:30:39 1997
--- decl.c Mon Dec 15 13:38:05 1997
*************** struct saved_scope {
*** 1832,1835 ****
--- 1832,1836 ----
HOST_WIDE_INT processing_template_decl;
tree previous_class_type, previous_class_values;
+ tree label_bindings;
};
static struct saved_scope *current_saved_scope;
*************** maybe_push_to_top_level (pseudo)
*** 1886,1889 ****
--- 1887,1891 ----
struct binding_level *b = inner_binding_level;
tree old_bindings = NULL_TREE;
+ tree link;
if (current_function_decl)
*************** maybe_push_to_top_level (pseudo)
*** 1916,1919 ****
--- 1918,1933 ----
current_binding_level = b;
+ /* Save current label bindings. */
+ s->label_bindings = NULL_TREE;
+ for (link = named_labels; link; link = TREE_CHAIN (link))
+ {
+ tree label = TREE_VALUE (link);
+ tree name = DECL_NAME (label);
+ s->label_bindings = tree_cons (label,
+ IDENTIFIER_LABEL_VALUE (name),
+ s->label_bindings);
+ SET_IDENTIFIER_LABEL_VALUE (name, NULL_TREE);
+ }
+
s->class_name = current_class_name;
s->class_type = current_class_type;
*************** pop_from_top_level ()
*** 1989,1992 ****
--- 2003,2016 ----
}
}
+
+ named_labels = NULL_TREE;
+ for (t = s->label_bindings; t; t = TREE_CHAIN (t))
+ {
+ tree decl = TREE_PURPOSE (t);
+ tree val = TREE_VALUE (t);
+ SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (decl), val);
+ named_labels = tree_cons (NULL_TREE, decl, named_labels);
+ }
+
current_class_name = s->class_name;
current_class_type = s->class_type;
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1997-12-15 13:47 Followup to templated label bug report Lee Iverson
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