C++ ptrmemfun break if FUNCTION_BOUNDARY < 2 * BITS_PER_UNIT

[Joern Rennecke]

> Doh.  Never mind.  I *does* work.  It's TRUNC_DIV that doesn't, for
> what I need.  I really need a right shift with sign extension:

I was talking about signed division.  I.e. TRUNC_DIV.  So we agree on
that point.

> Does RSHIFT_EXPR guarantee the preservation of the most significant
> (sign) bit?  Does it guarantee the semantics above?

According to c-tree.texi, it does.