Major overhaul to stop using pseudo-instructions (SETX, SETUW, SETSW) and generate actual machine instruction sequences directly.
Major overhaul to stop using pseudo-instructions (SETX, SETUW, SETSW)
and generate actual machine instruction sequences directly.

Also a couple of bug fixes in code for putting constants into registers:
-- Do *not* sign-extend unsigned constant that is shorter than int reg size
-- Fix handling of address constant (a GlobalValue) vs. constant that
   must be loaded.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@2856 91177308-0d34-0410-b5e6-96231b3b80d8

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