odd internal failure

[Richard Biener]

On Wed, Dec 1, 2021 at 8:46 AM Gary Oblock via Gcc <gcc@gcc.gnu.org> wrote:
>
> What is happening should be trivial to determine but for some reason it's
> not. I'd normally bounce this off a coworker but given the pandemic
> and modern dispersed hiring practices it's not even remotely possible.
>
> I'm making this call and tree_to_uhwi is failing on an internal error.
> That's normally easy to fix, but here is where the weirdness kicks in.
>
>   unsigned HOST_WIDE_INT wi_offset = tree_to_uhwi (offset);
>
> tree_to_uhwi from tree.h is:
>
> extern inline __attribute__ ((__gnu_inline__)) unsigned HOST_WIDE_INT
> tree_to_uhwi (const_tree t)
> {
>   gcc_assert (tree_fits_uhwi_p (t));
>   return TREE_INT_CST_LOW (t);
> }
>
> and
>
> tree_fits_uhwi_p from tree.c is
>
> bool
> tree_fits_uhwi_p (const_tree t)
> {
>   return (t != NULL_TREE
>  && TREE_CODE (t) == INTEGER_CST
>  && wi::fits_uhwi_p (wi::to_widest (t)));
> }
>
> Here's what this instrumentation shows (DEBUG_A is an indenting fprintf to
> stderr.)
>
>   DEBUG_A ("TREE_CODE(offset) = %s  && ", code_str (TREE_CODE (offset)));
>   DEBUG_A ("fits %s\n", wi::fits_uhwi_p (wi::to_widest (offset)) ? "true" : "false");
>   DEBUG_A ("tree_fits_uhwi_p(offset) %s\n",tree_fits_uhwi_p (offset) ? "true" : "false");
>
>            TREE_CODE(offset) = INTEGER_CST  && fits true
>            tree_fits_uhwi_p(offset) true
>
> By the way, offset is:
>
> _Literal (struct BASKET * *) 8
>
> And it's an operand of:
>
> MEM[(struct BASKET * *)&perm + 8B]
>
> Any clues on what's going on here?

it should just work.

> Thanks,
>
> Gary
>

Btw, try to setup things so you don't spam below stuff to public mailing lists.

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