Explicitly note that pre-inc/dec lvalues are not supported yet, so that it

doesn't crash.  (Such expressions are valid in C++, but not in C.)

llvm-svn: 86513

1 files changed, 5 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 15cb72e9fb8..63041fee823 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -919,13 +919,17 @@ LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) {
     return LV;
   }
   case UnaryOperator::Real:
-  case UnaryOperator::Imag:
+  case UnaryOperator::Imag: {
     LValue LV = EmitLValue(E->getSubExpr());
     unsigned Idx = E->getOpcode() == UnaryOperator::Imag;
     return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(),
                                                     Idx, "idx"),
                             MakeQualifiers(ExprTy));
   }
+  case UnaryOperator::PreInc:
+  case UnaryOperator::PreDec:
+    return EmitUnsupportedLValue(E, "pre-inc/dec expression");
+  }
 }
 
 LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) {