Index: lib/StaticAnalyzer/Core/Store.cpp
===================================================================
--- lib/StaticAnalyzer/Core/Store.cpp
+++ lib/StaticAnalyzer/Core/Store.cpp
@@ -402,6 +402,16 @@
   if (castTy.isNull() || V.isUnknownOrUndef())
     return V;
 
+  // The dispatchCast() call below would round the int to a float. What we want,
+  // however, is a bit-by-bit reinterpretation of the int as a float, which
+  // usually yields nothing garbage. For now skip casts from ints to floats.
+  // TODO: What other combinations of types are affected?
+  if (castTy->isFloatingType()) {
+    SymbolRef Sym = V.getAsSymbol();
+    if (Sym && !Sym->getType()->isFloatingType())
+      return UnknownVal();
+  }
+
   // When retrieving symbolic pointer and expecting a non-void pointer,
   // wrap them into element regions of the expected type if necessary.
   // SValBuilder::dispatchCast() doesn't do that, but it is necessary to
Index: test/Analysis/casts.c
===================================================================
--- test/Analysis/casts.c
+++ test/Analysis/casts.c
@@ -213,3 +213,35 @@
 }
 
 #endif
+
+char no_crash_SymbolCast_of_float_type_aux(int *p) {
+  *p += 1;
+  return *p;
+}
+
+void no_crash_SymbolCast_of_float_type() {
+  extern float x;
+  char (*f)() = no_crash_SymbolCast_of_float_type_aux;
+  f(&x);
+}
+
+double no_crash_reinterpret_double_as_int(double a) {
+  *(int *)&a = 1;
+  return a * a;
+}
+
+double no_crash_reinterpret_double_as_ptr(double a) {
+  *(void **)&a = 0;
+  return a * a;
+}
+
+double no_crash_reinterpret_double_as_sym_int(double a, int b) {
+  *(int *)&a = b;
+  return a * a;
+}
+
+double no_crash_reinterpret_double_as_sym_ptr(double a, void * b) {
+  *(void **)&a = b;
+  return a * a;
+}
+
Index: test/Analysis/casts.cpp
===================================================================
--- test/Analysis/casts.cpp
+++ test/Analysis/casts.cpp
@@ -102,3 +102,15 @@
   castToDerived(reinterpret_cast<Transparent *>(ORef))->getNotInt();
 }
 } // namespace base_to_derived_opaque_class
+
+namespace bool_to_nullptr {
+struct S {
+  int *a[1];
+  bool b;
+};
+void foo(S s) {
+  s.b = true;
+  for (int i = 0; i < 2; ++i)
+    (void)(s.a[i] != nullptr); // no-crash
+}
+} // namespace bool_to_nullptr