Add support in GRExprEngine for UnaryOperator::AlignOf. This fixes one crash report in PR 2796.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57777 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/Analysis/GRExprEngine.cpp b/lib/Analysis/GRExprEngine.cpp
index d122dca019..98fa58f5dd 100644
--- a/lib/Analysis/GRExprEngine.cpp
+++ b/lib/Analysis/GRExprEngine.cpp
@@ -1780,6 +1780,23 @@ void GRExprEngine::VisitUnaryOperator(UnaryOperator* U, NodeTy* Pred,
       
       return;
     }
+     
+    case UnaryOperator::AlignOf: {
+      
+      QualType T = U->getSubExpr()->getType();
+      
+      // FIXME: Add support for VLAs.
+      
+      if (!T.getTypePtr()->isConstantSizeType())
+        return;
+      
+      uint64_t size = getContext().getTypeAlign(T) / 8;                
+      const GRState* St = GetState(Pred);
+      St = SetSVal(St, U, NonLoc::MakeVal(getBasicVals(), size, U->getType()));
+      
+      MakeNode(Dst, U, Pred, St);
+      return;
+    }
       
     case UnaryOperator::SizeOf: {