From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Thu, 18 Apr 2013 22:49:48 +0000 (+0000)
Subject: Add comment to describe cleverness.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6576a0d1e26f617d29d54ed99b16099d93a05264;p=clang

Add comment to describe cleverness.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179806 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 699f7d4b3f..ff72f495c8 100644
--- a/lib/Basic/TargetInfo.cpp
+++ b/lib/Basic/TargetInfo.cpp
@@ -373,6 +373,8 @@ bool TargetInfo::validateOutputConstraint(ConstraintInfo &Info) const {
     Name++;
   }
 
+  // If a constraint allows neither memory nor register operands it contains
+  // only modifiers. Reject it.
   return Info.allowsMemory() || Info.allowsRegister();
 }