From: Aaron Ballman <aaron@aaronballman.com>
Date: Thu, 20 Nov 2014 21:34:56 +0000 (+0000)
Subject: The Syntax enumeration requires at least three bits to store all of its values. Incre... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=796a6179f890ef4b76428987d382ae37cb188eda;p=clang

The Syntax enumeration requires at least three bits to store all of its values. Increase the number of bits for SyntaxUsed. Decrease the number of expression arguments allowed by a single bit so that the bit fields continue to add up to 32-bits evenly.

There is no test for this fix because I could find no reasonable way to trigger a visible failure from it.

Thanks to Doug Gregor for spotting this!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222456 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Sema/AttributeList.h b/include/clang/Sema/AttributeList.h
index 39e7ccd7b2..c8e8625b0c 100644
--- a/include/clang/Sema/AttributeList.h
+++ b/include/clang/Sema/AttributeList.h
@@ -94,10 +94,10 @@ private:
 
   /// The number of expression arguments this attribute has.
   /// The expressions themselves are stored after the object.
-  unsigned NumArgs : 16;
+  unsigned NumArgs : 15;
 
   /// Corresponds to the Syntax enum.
-  unsigned SyntaxUsed : 2;
+  unsigned SyntaxUsed : 3;
 
   /// True if already diagnosed as invalid.
   mutable unsigned Invalid : 1;