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(build_type_variant): Only return existing type if it 

also has the same TYPE_NAME.

From-SVN: r7954
This commit is contained in:
Jim Wilson 1994-08-19 17:20:05 -07:00
parent b6d5307feb
commit e24fa53404
1 changed files with 7 additions and 12 deletions
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19
gcc/tree.c
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@ -2802,19 +2802,14 @@ build_type_variant (type, constp, volatilep)
constp = !!constp;
volatilep = !!volatilep;
/* If not generating auxiliary info, search the chain of variants to see
if there is already one there just like the one we need to have. If so,
use that existing one.
/* Search the chain of variants to see if there is already one there just
like the one we need to have. If so, use that existing one. We must
preserve the TYPE_NAME, since there is code that depends on this. */
We don't do this in the case where we are generating aux info because
in that case we want each typedef names to get it's own distinct type
node, even if the type of this new typedef is the same as some other
(existing) type. */
if (!flag_gen_aux_info)
for (t = TYPE_MAIN_VARIANT(type); t; t = TYPE_NEXT_VARIANT (t))
if (constp == TYPE_READONLY (t) && volatilep == TYPE_VOLATILE (t))
return t;
for (t = TYPE_MAIN_VARIANT(type); t; t = TYPE_NEXT_VARIANT (t))
if (constp == TYPE_READONLY (t) && volatilep == TYPE_VOLATILE (t)
&& TYPE_NAME (t) == TYPE_NAME (type))
return t;
/* We need a new one. */