From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 23 Mar 2010 15:50:49 +0000 (+0000)
Subject: Add comment.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a56daf8a3906e478838c0d502f6a03cc2f22ef4c;p=oota-llvm.git

Add comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99284 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Transforms/Utils/BuildLibCalls.h b/include/llvm/Transforms/Utils/BuildLibCalls.h
index 9b76a37a85c..d278672a1f0 100644
--- a/include/llvm/Transforms/Utils/BuildLibCalls.h
+++ b/include/llvm/Transforms/Utils/BuildLibCalls.h
@@ -49,6 +49,9 @@ namespace llvm {
   Value *EmitMemCpy(Value *Dst, Value *Src, Value *Len,
                     unsigned Align, IRBuilder<> &B, const TargetData *TD);
 
+  /// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
+  /// This expects that the Len and ObjSize have type 'intptr_t' and Dst/Src
+  /// are pointers.
   Value *EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
                        IRBuilder<> &B, const TargetData *TD);