[patch] 2 patches for PR tree-optimization/34648

[Richard Kenner]

> Right now we try to carry some idea of pure/const into the middle-end
> (through DECL_PURE/etc), and nobody is ever really truly sure what
> pure/const actually mean (we seem to have a thread every 5-6 months
> about it).  We should just transform it into a bitmask of separate
> attributes.

I strongly support that, for the reasons you give.