analyzer infrastructure: make a bunch of changes to symbolic expressions that
Zhongxing and I discussed by email.

Main changes:
- Removed SymIntConstraintVal and SymIntConstraint
- Added SymExpr as a parent class to SymbolData, SymSymExpr, SymIntExpr
- Added nonloc::SymExprVal to wrap SymExpr
- SymbolRef is now just a typedef of 'const SymbolData*'
- Bunch of minor code cleanups in how some methods were invoked (no functionality change)

This changes are part of a long-term plan to have full symbolic expression
trees. This will be useful for lazily evaluating complicated expressions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67731 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/SimpleConstraintManager.h b/lib/Analysis/SimpleConstraintManager.h
index 8195c8e..fb41e2f 100644
--- a/lib/Analysis/SimpleConstraintManager.h
+++ b/lib/Analysis/SimpleConstraintManager.h
@@ -45,7 +45,7 @@
                            bool& isFeasible);
 
   const GRState* AssumeSymInt(const GRState* St, bool Assumption,
-                              const SymIntConstraint& C, bool& isFeasible);
+                              const SymIntExpr *SE, bool& isFeasible);
 
   virtual const GRState* AssumeSymNE(const GRState* St, SymbolRef sym,
                                      const llvm::APSInt& V,