[Bug tree-optimization/32461] [4.3 Regression] Segmentation fault in build_classic_dist_vector_1() at tree-data-ref.c:2700

[schwab at suse dot de]

------- Comment #25 from schwab at suse dot de  2007-06-24 13:34 -------
Subject: Re:  [4.3 Regression] Segmentation fault in
build_classic_dist_vector_1() at tree-data-ref.c:2700

"Richard Guenther" <richard.guenther@gmail.com> writes:

> quite possibly.  The patch is ok if it bootstraps & tests and you change
>
>          /* X + ~X is -1.  */
>          if (TREE_CODE (arg1) == BIT_NOT_EXPR
> -             && operand_equal_p (arg0, TREE_OPERAND (arg1, 0), 0)
> +             && operand_equal_p (op0, TREE_OPERAND (op1, 0), 0)

That won't work if op1 != arg1, ie. there are NOPs around BIT_NOT_EXPR.

Andreas.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32461