- PR3463, PR3398, <rdar://problem/6553401> crash on relocatable
   symbol addresses as constants in static locals.

 - There are many more scenarious we could handle (like arithmetic on
   such an int) but this is the main use case.

llvm-svn: 65074

llvm-svn: 63280

 - Merged into single ComplexEvaluator, these share too much logic to
   be worth splitting for float/int (IMHO). Will split on request.

llvm-svn: 63248

llvm-svn: 59861

 - Use -verify and added expected warnings for EXTWARN change.

llvm-svn: 54342

expressions.

llvm-svn: 51677

llvm-svn: 47442