[PATCH][C++] Fix PR29433, make C++ use a lot less time/memory

[Gabriel Dos Reis]

On Mon, 11 Dec 2006, Richard Guenther wrote:

| > My inclination would be to make the change, and downgrade the error to
| > pedwarn.  There's no need for it to be a hard error.
|
| Note that we cannot simply apply the proposed patch as it changes
| debug info (and maybe also diagnostics, but at least we don't have
| testsuite entry for regressions there).

Is it because we would be accepting the program that we would
be forced to change the debug info?

-- Gaby