[PATCH PR48689] ICE in fold-const.c:13798 with fold checking

[Richard Guenther]

On Sun, May 22, 2011 at 6:26 PM, Tom de Vries <vries@codesourcery.com> wrote:
> Hi,
>
> I also ran into this assert:
> ...
> <built-in>:0:0: internal compiler error: tree check: expected tree that
> contains 'common' structure, have 'integer_cst' in fold_checksum_tree, at
> fold-const.c:13798
> ...
>
> With a recent change in r172386, using a TREE_CHAIN on an INTEGER_CST has become
> illegal:
> ...
>        * tree.h (struct tree_int_cst, struct real_value): Include tree_typed
>        instead of tree_common.
>        * tree.c (initialize_tree_contains_struct): Mark such nodes as being
>        TS_TYPED rather than TS_COMMON.
> ...
>
> I fixed it by guarding the use of TREE_CHAIN with CODE_CONTAINS_STRUCT
> (TS_COMMON), to make sure that the tree has a TREE_CHAIN field.
>
> Tested with --enable-checking=all build.
>
> Ok for trunk?

Ok.

Thanks,
Richard.

> Thanks,
> - Tom
>
>
> 2011-05-22  Tom de Vries  <tom@codesourcery.com>
>
>        PR middle-end/48689
>        * fold-const.c (fold_checksum_tree): Guard TREE_CHAIN use with
>        CODE_CONTAINS_STRUCT (TS_COMMON).
>