Index: lib/StaticAnalyzer/Checkers/RetainCountChecker/RetainCountChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/RetainCountChecker/RetainCountChecker.cpp
+++ lib/StaticAnalyzer/Checkers/RetainCountChecker/RetainCountChecker.cpp
@@ -970,8 +970,10 @@
     return Pred;
 
   ProgramStateRef state = C.getState();
-  SymbolRef Sym =
-    state->getSValAsScalarOrLoc(RetE, C.getLocationContext()).getAsLocSymbol();
+  // We need to dig down to the symbolic base here because various
+  // custom allocators do sometimes return the symbol with an offset.
+  SymbolRef Sym = state->getSValAsScalarOrLoc(RetE, C.getLocationContext())
+                      .getAsLocSymbol(/*IncludeBaseRegions=*/true);
   if (!Sym)
     return Pred;
 
Index: test/Analysis/retain-release.mm
===================================================================
--- test/Analysis/retain-release.mm
+++ test/Analysis/retain-release.mm
@@ -515,3 +515,35 @@
 }
 
 }
+
+namespace reinterpret_casts {
+
+void *foo() {
+  void *p = const_cast<void *>(
+      reinterpret_cast<const void *>(CFArrayCreate(0, 0, 0, 0)));
+  void *q = reinterpret_cast<void *>(
+      reinterpret_cast<char *>(p) + 1);
+  // FIXME: Should warn about a leak here. The function should return at +0,
+  // but it returns at +1 instead.
+  return q;
+}
+
+void *fooCreate() {
+  void *p = const_cast<void *>(
+      reinterpret_cast<const void *>(CFArrayCreate(0, 0, 0, 0)));
+  void *q = reinterpret_cast<void *>(
+      reinterpret_cast<char *>(p) + 1);
+  // The function follows the Create Rule.
+  return q; // no-warning
+}
+
+void *fooBar() CF_RETURNS_RETAINED {
+  void *p = const_cast<void *>(
+      reinterpret_cast<const void *>(CFArrayCreate(0, 0, 0, 0)));
+  void *q = reinterpret_cast<void *>(
+      reinterpret_cast<char *>(p) + 1);
+  // The function follows the Create Rule.
+  return q; // no-warning
+}
+
+}