Switch statement: extra out-of-bounds code emitted

[John Wehle]

> What is the status of VRP?

VRP has been improved and updated to work with the current source tree.
It successfully bootstraps and passes make check on Dec Alpha 4.0f,
HP-UX 11.0, IBM rs6000 AIX 4.3, Solaris 7 SPARC, and Solaris 7 x86.

Build times are:

                 without VRP     with VRP
Alpha
  stage2/cc1       22 min.        30 min.
  stage3/cc1       33 min.        44 min.

x86
  stage2/cc1       13 min.        17 min.
  stage3/cc1       19 min.        24 min.

Various generic bits and pieces have been posted to gcc-patches.
Some have been approved and committed.  I'm in the process of
polishing up the remaining bits.

> Can you send me a fresh patch?

Perhaps in a day or two, though some of the comments in the code
will be out of date.  I need to take a pass at updating them.

-- John
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|    John Wehle    |     Fax: 1-215-540-5495  |                         |
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