[PATCH][4.3] Alternate fix for PR34244, fix PR36262

[Zdenek Dvorak]

Hi,

> Zdenek, can you think of a different way to fix the compile-time and
> memory problems with clearing the SCEV cache?

no, not really.  One possible way I had tried some time ago was to
remove just the information that is invalidated from the cache; however,
the overhead of deciding which part of the cache is invalidated was
larger than the gains,

Zdenek