From cff83a2f242f686503a4e54df00aed3f0fa321ca Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 9 Nov 2003 03:32:52 +0000
Subject: [PATCH] Add support for memmove

llvm-svn: 9824
---
 llvm/lib/Analysis/DataStructure/Local.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/llvm/lib/Analysis/DataStructure/Local.cpp b/llvm/lib/Analysis/DataStructure/Local.cpp
index f3406b76990e..0aca21a437ba 100644
--- a/llvm/lib/Analysis/DataStructure/Local.cpp
+++ b/llvm/lib/Analysis/DataStructure/Local.cpp
@@ -446,6 +446,15 @@ void GraphBuilder::visitCallSite(CallSite CS) {
         if (DSNode *N = RetNH.getNode())
           N->setModifiedMarker();
         return;
+      } else if (F->getName() == "memmove") {
+        // Merge the first & second arguments with the result, and mark the
+        // memory read and modified.
+        DSNodeHandle RetNH = getValueDest(*CS.getInstruction());
+        RetNH.mergeWith(getValueDest(**CS.arg_begin()));
+        RetNH.mergeWith(getValueDest(**(CS.arg_begin()+1)));
+        if (DSNode *N = RetNH.getNode())
+          N->setModifiedMarker()->setReadMarker();
+        return;
       } else if (F->getName() == "bzero") {
         // Mark the memory modified.
         DSNodeHandle H = getValueDest(**CS.arg_begin());