https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90969
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46513
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46513&action=edit
gcc10-pr90969.patch
Untested fix. If lval, ary is used solely in:
if (lval && ary == oldary && index == oldidx)
return t;
else if (lval)
return build4 (ARRAY_REF, TREE_TYPE (t), ary, index, NULL, NULL);
and so looking through the VCE is harmful, both because it forces not reusing
of t in more cases (when for both 0 and 1 operand cxx_eval_constant_expression
didn't simplify anything), but because it strips away the needed VCE.
