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?
Thanks,
Gary
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