From 95a7de6b916e49265ebdae04a32f6beda7f89028 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 4 May 2011 22:48:19 +0000
Subject: [PATCH] Preserve line number information while threading jumps.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130880 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/JumpThreading.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp
index 7168177a76b..5a8f4ca192d 100644
--- a/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/lib/Transforms/Scalar/JumpThreading.cpp
@@ -929,9 +929,10 @@ bool JumpThreading::SimplifyPartiallyRedundantLoad(LoadInst *LI) {
   if (UnavailablePred) {
     assert(UnavailablePred->getTerminator()->getNumSuccessors() == 1 &&
            "Can't handle critical edge here!");
-    Value *NewVal = new LoadInst(LoadedPtr, LI->getName()+".pr", false,
+    LoadInst *NewVal = new LoadInst(LoadedPtr, LI->getName()+".pr", false,
                                  LI->getAlignment(),
                                  UnavailablePred->getTerminator());
+    NewVal->setDebugLoc(LI->getDebugLoc());
     AvailablePreds.push_back(std::make_pair(UnavailablePred, NewVal));
   }
 
@@ -944,6 +945,7 @@ bool JumpThreading::SimplifyPartiallyRedundantLoad(LoadInst *LI) {
   PHINode *PN = PHINode::Create(LI->getType(), std::distance(PB, PE), "",
                                 LoadBB->begin());
   PN->takeName(LI);
+  PN->setDebugLoc(LI->getDebugLoc());
 
   // Insert new entries into the PHI for each predecessor.  A single block may
   // have multiple entries here.
@@ -1375,7 +1377,8 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
 
   // We didn't copy the terminator from BB over to NewBB, because there is now
   // an unconditional jump to SuccBB.  Insert the unconditional jump.
-  BranchInst::Create(SuccBB, NewBB);
+  BranchInst *NewBI =BranchInst::Create(SuccBB, NewBB);
+  NewBI->setDebugLoc(BB->getTerminator()->getDebugLoc());
 
   // Check to see if SuccBB has PHI nodes. If so, we need to add entries to the
   // PHI nodes for NewBB now.