Make isICE assert when Evaluate can't evaluate an ICE, as suggested by
Daniel.  Some minor fixes/cleanup.  Allow __builtin_choose_expr, 
__real__, and __imag__ in ICEs, following gcc's example.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65610 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed