Don't assert in the analyzer when analyze code does a byte load from a function's address. Fixes PR 8052.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112761 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 6 insertions, 9 deletions

diff --git a/lib/Checker/RegionStore.cpp b/lib/Checker/RegionStore.cpp
index 595fb6f19b..19945a7b3c 100644
--- a/lib/Checker/RegionStore.cpp
+++ b/lib/Checker/RegionStore.cpp
@@ -1087,6 +1087,10 @@ SVal RegionStoreManager::RetrieveElement(Store store,
       return ValMgr.makeIntVal(c, T);
     }
   }
+  
+  // Check for loads from a code text region.  For such loads, just give up.
+  if (const CodeTextRegion *cR = dyn_cast<CodeTextRegion>(superR))
+    return UnknownVal();
 
   // Handle the case where we are indexing into a larger scalar object.
   // For example, this handles:
diff --git a/lib/Checker/Store.cpp b/lib/Checker/Store.cpp
index 7c80eed0ea..1cb5cd70ca 100644
--- a/lib/Checker/Store.cpp
+++ b/lib/Checker/Store.cpp
@@ -101,17 +101,10 @@ const MemRegion *StoreManager::CastRegion(const MemRegion *R, QualType CastToTy)
       assert(0 && "Invalid region cast");
       break;
     }
-    
+
     case MemRegion::FunctionTextRegionKind:
     case MemRegion::BlockTextRegionKind:
-    case MemRegion::BlockDataRegionKind: {
-      // CodeTextRegion should be cast to only a function or block pointer type,
-      // although they can in practice be casted to anything, e.g, void*, char*,
-      // etc.  
-      // Just return the region.
-      return R;
-    }
-
+    case MemRegion::BlockDataRegionKind:
     case MemRegion::StringRegionKind:
       // FIXME: Need to handle arbitrary downcasts.
     case MemRegion::SymbolicRegionKind: