Don't try to evaluate the LHS or RHS of a member pointer binary operation. Fixes PR8507.

llvm-svn: 117850

clang/lib/AST/ExprConstant.cpp

@@ -1966,6 +1966,10 @@ bool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) {
     return true;
   }
 
+  // We can't evaluate pointer-to-member operations.
+  if (E->isPtrMemOp())
+    return false;
+
   // FIXME: Diagnostics?  I really don't understand how the warnings
   // and errors are supposed to work.
   APFloat RHS(0.0);

clang/test/CodeGenCXX/pointers-to-data-members.cpp

@@ -206,3 +206,14 @@ namespace BoolPtrToMember {
     return x.*member;
   }
 }
+
+namespace PR8507 {
+  
+struct S;
+void f(S* p, double S::*pm) {
+  if (0 < p->*pm) {
+  }
+}
+
+}
+