Allow a pointer implicitly cast to a bool as a constant expression, as 
required by the standard (the standard doesn't know anything about 
implicit casts).

Disallow pointers cast to non-integral arithmetic types as constant 
expressions.  This was previously allowed by accident. 



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51779 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/static-init.c b/test/Sema/static-init.c
index e710973..2439d5e 100644
--- a/test/Sema/static-init.c
+++ b/test/Sema/static-init.c
@@ -1,3 +1,7 @@
 // RUN: clang -fsyntax-only -verify %s
 static int f = 10;
 static int b = f; // expected-error {{initializer element is not constant}}
+
+float r  = (float) &r; // expected-error {{initializer element is not constant}}
+long long s = (long long) &s;
+_Bool t = &t;