From 6576a0d1e26f617d29d54ed99b16099d93a05264 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Thu, 18 Apr 2013 22:49:48 +0000
Subject: [PATCH] Add comment to describe cleverness.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179806 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Basic/TargetInfo.cpp | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 699f7d4b3f9..ff72f495c8b 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();
}
--
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