[C++ PATCH] Emit DECL_EXPR for vla_p new operator (PR c++/39367)

[Mark Mitchell]

Jason Merrill wrote:

>> Certainly from a C++ type point of view, "new int[n]" has type "int *";
>> thus what we're doing seems like it could potentially even yield
>> incorrect information for typeid, throwing exceptions, etc.  I don't
>> know if we correct that at some later point.
> 
> We do.  It seems that we're using an array type in the inner processing
> of new in order to use build_vec_init to initialize the allocated array,
> but I think we could accomplish the same thing by changing
> build_vec_init to handle getting a pointer as base.

That makes sense to me.  I think at one point I was even looking at that
so as to make it easier (with -Os) to use the vector helper routines for
construction and such.  What I wanted to do was to do set things up so
that we were conceptually ready to call those routines -- and then
expand them inline when not -Os.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713