commit cb529b542a6c473251d15fdd637b3230906ea1dc
author Zhongxing Xu <xuzhongxing@gmail.com> Sun Nov 16 07:06:26 2008 +0000
committer Zhongxing Xu <xuzhongxing@gmail.com> Sun Nov 16 07:06:26 2008 +0000
tree a2fc8fa7572ae8741b7eedb67dbe5b30fcb5f816
parent 5ea7d07ea7d9f2b679c85df7cc45fcc6e157e396

Enhance modularization: return a <state,loc> pair to let GRExprEngine modify the
environment.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59407 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/BasicStore.cpp

diff --git a/lib/Analysis/BasicStore.cpp b/lib/Analysis/BasicStore.cpp
index 8b5ef6e..ae6febf 100644
--- a/lib/Analysis/BasicStore.cpp
+++ b/lib/Analysis/BasicStore.cpp
@@ -66,9 +66,9 @@
   ///  conversions between arrays and pointers.
   SVal ArrayToPointer(SVal Array) { return Array; }
 
-  const GRState* CastRegion(const GRState* St, SVal VoidPtr, QualType CastToTy,
-                            Stmt* CastE) {
-    return St;
+  std::pair<const GRState*, SVal> 
+  CastRegion(const GRState* St, SVal VoidPtr, QualType CastToTy, Stmt* CastE) {
+    return std::pair<const GRState*, SVal>(St, UnknownVal());
   }
 
   

lib/Analysis/GRExprEngine.cpp

diff --git a/lib/Analysis/GRExprEngine.cpp b/lib/Analysis/GRExprEngine.cpp
index e002c13..fe7d6f9 100644
--- a/lib/Analysis/GRExprEngine.cpp
+++ b/lib/Analysis/GRExprEngine.cpp
@@ -1698,11 +1698,15 @@
       assert(Loc::IsLocType(ExTy));
 
       // Delegate to store manager.
-      const GRState* NewSt = getStoreManager().CastRegion(St, V, T, CastE);
+      std::pair<const GRState*, SVal> Res =  
+        getStoreManager().CastRegion(St, V, T, CastE);
+
+      const GRState* NewSt = Res.first;
+      SVal NewPtr = Res.second;
 
       // If no new region is created, fall through to the default case.
       if (NewSt != St) {
-        MakeNode(Dst, CastE, N, NewSt);
+        MakeNode(Dst, CastE, N, BindExpr(NewSt, CastE, NewPtr));
         continue;
       }
     }

lib/Analysis/RegionStore.cpp

diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index 732785c..fab2e60 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -82,8 +82,8 @@
 
   SVal ArrayToPointer(SVal Array);
 
-  const GRState* CastRegion(const GRState* St, SVal VoidPtr, 
-                            QualType CastToTy, Stmt* CastE);
+  std::pair<const GRState*, SVal>
+  CastRegion(const GRState* St, SVal VoidPtr, QualType CastToTy, Stmt* CastE);
 
   SVal Retrieve(Store S, Loc L, QualType T = QualType());
 
@@ -264,10 +264,9 @@
   return loc::MemRegionVal(ER);                    
 }
 
-const GRState* RegionStoreManager::CastRegion(const GRState* St,
-                                              SVal VoidPtr, 
-                                              QualType CastToTy,
-                                              Stmt* CastE) {
+std::pair<const GRState*, SVal>
+RegionStoreManager::CastRegion(const GRState* St, SVal VoidPtr, 
+                               QualType CastToTy, Stmt* CastE) {
   if (const AllocaRegion* AR =
       dyn_cast<AllocaRegion>(cast<loc::MemRegionVal>(VoidPtr).getRegion())) {
 
@@ -278,14 +277,13 @@
     nonloc::ConcreteInt Idx(getBasicVals().getZeroWithPtrWidth(false));
     const ElementRegion* ER = MRMgr.getElementRegion(Idx, TR);
 
-    St = StateMgr.BindExpr(St, CastE, loc::MemRegionVal(ER));
-
     // Add a RegionView to base region.
-    return AddRegionView(St, TR, AR);
+    return std::pair<const GRState*, SVal>(AddRegionView(St, TR, AR), 
+                                           loc::MemRegionVal(ER));
   }
 
   // Default case.
-  return St;
+  return std::pair<const GRState*, SVal>(St, UnknownVal());
 }
 
 SVal RegionStoreManager::Retrieve(Store S, Loc L, QualType T) {