c/6346: sign extension missing after cast down and up on long long bitfield

[neil@gcc.gnu.org]

Synopsis: sign extension missing after cast down and up on long long bitfield

Responsible-Changed-From-To: unassigned->neil
Responsible-Changed-By: neil
Responsible-Changed-When: Wed May 22 05:08:57 2002
Responsible-Changed-Why:
    Bitfield issues are assigned to me, though I doubt I'll
    have time to fix them until 3.3.
State-Changed-From-To: open->analyzed
State-Changed-By: neil
State-Changed-When: Wed May 22 05:08:57 2002
State-Changed-Why:
    Bitfields have several issues, fundamentally down to the
    single fact that their type is not represented properly in the
    compiler.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6346