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re PR middle-end/20030 (Broken arguments access)

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2005-02-18  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/20030
        * fold-const.c (fold_indirect_ref_1): Use the correct index for zero access,
        the lower bound of the array type if it exists.

From-SVN: r95226
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Andrew Pinski 2005-02-18 14:31:50 +00:00 committed by Andrew Pinski
parent 2aabee29e1
commit 0d56ab3348
2 changed files with 19 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2005-02-18 Andrew Pinski <pinskia@physics.uc.edu>
PR middle-end/20030
* fold-const.c (fold_indirect_ref_1): Use the correct index for zero access,
the lower bound of the array type if it exists.
2005-02-18 Alexandre Oliva <aoliva@redhat.com>
PR c++/20008

15
gcc/fold-const.c
View File

@ -11258,15 +11258,26 @@ fold_indirect_ref_1 (tree t)
/* *(foo *)&fooarray => fooarray[0] */
else if (TREE_CODE (optype) == ARRAY_TYPE
&& lang_hooks.types_compatible_p (type, TREE_TYPE (optype)))
return build4 (ARRAY_REF, type, op, size_zero_node, NULL_TREE, NULL_TREE);
{
tree type_domain = TYPE_DOMAIN (optype);
tree min_val = size_zero_node;
if (type_domain && TYPE_MIN_VALUE (type_domain))
min_val = TYPE_MIN_VALUE (type_domain);
return build4 (ARRAY_REF, type, op, min_val, NULL_TREE, NULL_TREE);
}
}
/* *(foo *)fooarrptr => (*fooarrptr)[0] */
if (TREE_CODE (TREE_TYPE (subtype)) == ARRAY_TYPE
&& lang_hooks.types_compatible_p (type, TREE_TYPE (TREE_TYPE (subtype))))
{
tree type_domain;
tree min_val = size_zero_node;
sub = build_fold_indirect_ref (sub);
return build4 (ARRAY_REF, type, sub, size_zero_node, NULL_TREE, NULL_TREE);
type_domain = TYPE_DOMAIN (TREE_TYPE (sub));
if (type_domain && TYPE_MIN_VALUE (type_domain))
min_val = TYPE_MIN_VALUE (type_domain);
return build4 (ARRAY_REF, type, sub, min_val, NULL_TREE, NULL_TREE);
}
return NULL_TREE;