[09/13] [C++] constexpr: request insert iff depth is ok

[Jeff Law]

On 12/26/22 21:30, Alexandre Oliva via Gcc-patches wrote:
> 
> cxx_eval_call_expression requests an INSERT even in cases when it
> would later decide not to insert.  This could break double-hashing
> chains.  Arrange for it to use NO_INSERT when the insertion would not
> be completed.
> 
> Regstrapped on x86_64-linux-gnu.  Ok to install?
> 
> 
> for  gcc/cp/ChangeLog
> 
> 	* constexpr.cc (cxx_eval_call_expression): Do not request an
> 	INSERT that would not be completed.
OK.
Jeff