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


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63248 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed