Sean Callanan faa0bb3fa1 Rewrote the bitfield logic. Major changes include:
- Removed the BitfieldMap class because it is unnecessary.
  We now just track the most recently added field.

- Moved the code that calculates bitfield widths so it
  can also be used to determine whether it's necessary
  to insert anonymous fields.

- Simplified the anonymous field calculation code into
  three cases (two of which are resolved identically).

- Beefed up the bitfield testcase.

llvm-svn: 169449
2012-12-05 23:37:14 +00:00
2012-12-05 23:32:44 +00:00
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