middle-end/6566: sparc64-unknown-netbsd-gcc loops consuming memory

[davem@gcc.gnu.org]

Synopsis: sparc64-unknown-netbsd-gcc loops consuming memory

Responsible-Changed-From-To: unassigned->hubicka
Responsible-Changed-By: davem
Responsible-Changed-When: Fri Jun  7 01:32:16 2002
Responsible-Changed-Why:
    Jan can you take a look at this?  The problem is
    calculate_global_regs_live() is what is looping.
    Every iteration, right before qhead gets to qtail
    in the main loop, we advance qtail almost through
    the whole queue.  This process repeats forever.
    Any target crossed to sparc64-netbsd will be able
    to reproduce this so it should be easy for you to
    work on it.
    Thanks.
State-Changed-From-To: open->analyzed
State-Changed-By: davem
State-Changed-When: Fri Jun  7 01:32:16 2002
State-Changed-Why:
    calculate_global_regs_live loops forever never making
    forward progress

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