This code was trying too hard.  By eliminating redundant edges in the CFG due to switch cases going to the same place, it make #pred != #phi entries, breaking live interval analysis.
This code was trying too hard.  By eliminating redundant edges in the CFG
due to switch cases going to the same place, it make #pred != #phi entries,
breaking live interval analysis.

This fixes 458.sjeng on x86 with llc.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@30236 91177308-0d34-0410-b5e6-96231b3b80d8

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