When rebuilding constant structs, make sure to honor the isPacked bit. This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll
When rebuilding constant structs, make sure to honor the isPacked bit.
This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@37423 91177308-0d34-0410-b5e6-96231b3b80d8

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