From 9dd19667fb441f715f920156905b5217382d250c Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Thu, 26 May 2011 22:43:14 +0000
Subject: [PATCH] Do not move DBG_VALUE in middle of PHI nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132161 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/CodeGenPrepare.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 7ba92ba2565..da6bf316f31 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -557,7 +557,10 @@ bool CodeGenPrepare::OptimizeCallInst(CallInst *CI) {
       if (DVI->getParent() != VI->getParent() || DT->dominates(DVI, VI)) {
         DEBUG(dbgs() << "Moving Debug Value before :\n" << *DVI << ' ' << *VI);
         DVI->removeFromParent();
-        DVI->insertAfter(VI);
+        if (isa<PHINode>(VI))
+          DVI->insertBefore(VI->getParent()->getFirstNonPHI());
+        else
+          DVI->insertAfter(VI);
         return true;
       }