[analysis] Re-discard type sugar when casting values retrieved from the Store.

Canonicalization was accidentally omitted in 6d3f43e.

(cherry picked from commit f0ced2d)

Author: haoNoQ

clang/lib/StaticAnalyzer/Core/Store.cpp

@@ -394,8 +394,8 @@ SVal StoreManager::attemptDownCast(SVal Base, QualType TargetType,
 }
 
 static bool hasSameUnqualifiedPointeeType(QualType ty1, QualType ty2) {
-  return ty1->getPointeeType().getTypePtr() == 
-    ty2->getPointeeType().getTypePtr();
+  return ty1->getPointeeType().getCanonicalType().getTypePtr() ==
+         ty2->getPointeeType().getCanonicalType().getTypePtr();
 }
 
 /// CastRetrievedVal - Used by subclasses of StoreManager to implement
@@ -427,7 +427,7 @@ SVal StoreManager::CastRetrievedVal(SVal V, const TypedValueRegion *R,
   // correctly every time we need it.
   if (castTy->isPointerType() && !castTy->isVoidPointerType())
     if (const auto *SR = dyn_cast_or_null<SymbolicRegion>(V.getAsRegion())) {
-      QualType sr = SR->getSymbol()->getType(); 
+      QualType sr = SR->getSymbol()->getType();
       if (!hasSameUnqualifiedPointeeType(sr, castTy))
           return loc::MemRegionVal(castRegion(SR, castTy));
     }

clang/test/Analysis/uninit-val-const-likeness.c

@@ -54,3 +54,21 @@ int work3(const Params * const params) {
     sum += fooList[i]; // no-warning
   return sum;
 }
+
+typedef Params ParamsTypedef;
+typedef const ParamsTypedef *ConstParamsTypedef;
+
+static void create4(ConstParamsTypedef const params, int fooList[]) {
+  int tmpList[SIZE] = {0};
+  for (int i = 0; i < params->noOfSymbols; i++)
+    fooList[i] = tmpList[i];
+}
+
+int work4(Params * const params) {
+  int fooList[SIZE];
+  create4(params, fooList);
+  int sum = 0;
+  for (int i = 0; i < params->noOfSymbols; i++)
+    sum += fooList[i]; // no-warning
+  return sum;
+}