From: Craig Topper <craig.topper@gmail.com>
Date: Thu, 13 Apr 2017 16:34:49 +0000 (+0000)
Subject: [APSInt] Add a static_assert to ensure APSInt is packed well with APInt after r300171.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9c0f53a0b48126eae12daf453c9d39af79232a24;p=llvm

[APSInt] Add a static_assert to ensure APSInt is packed well with APInt after r300171.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300213 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/APSInt.h b/include/llvm/ADT/APSInt.h
index 813b3686d6b..865af2db2a0 100644
--- a/include/llvm/ADT/APSInt.h
+++ b/include/llvm/ADT/APSInt.h
@@ -24,7 +24,9 @@ class LLVM_NODISCARD APSInt : public APInt {
 
 public:
   /// Default constructor that creates an uninitialized APInt.
-  explicit APSInt() : IsUnsigned(false) {}
+  explicit APSInt() : IsUnsigned(false) {
+    static_assert(sizeof(*this) == 16, "APSInt fields poorly packed");
+  }
 
   /// APSInt ctor - Create an APSInt with the specified width, default to
   /// unsigned.