On 2016.04.06 at 18:25 -0400, Patrick Palka wrote: > On Wed, 6 Apr 2016, Patrick Palka wrote: > Here is a safer and simpler approach that just walks the expression > being unshared to try to find a CONSTRUCTOR node. If it finds one, then > we unshare the whole expression. Otherwise we return the original > expression. It should be completely safe to avoid unsharing an > expression if it contains no CONSTRUCTOR nodes. > > gcc/cp/ChangeLog: > > PR c++/70452 > * constexpr.c (find_constructor): New function. > (unshare_constructor): New function. > (cxx_eval_call_expression): Use unshare_constructor instead of > unshare_expr. > (find_array_ctor_elt): Likewise. > (cxx_eval_vec_init_1): Likewise. > (cxx_eval_store_expression): Likewise. > (cxx_eval_constant_expression): Likewise.
This patch causes: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70590 -- Markus
