From 06887c9a2ad0d30c3cdfeff4d5e268a634c9d1a6 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 29 Feb 2004 22:24:41 +0000
Subject: [PATCH] Fix bug:
 test/Regression/Transforms/LowerInvoke/2004-02-29-PHICrash.llx

... which tickled the lowerinvoke pass because it used the BCE routines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12012 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/BreakCriticalEdges.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/Transforms/Utils/BreakCriticalEdges.cpp b/lib/Transforms/Utils/BreakCriticalEdges.cpp
index 178e8ca1957..8e00f9c613e 100644
--- a/lib/Transforms/Utils/BreakCriticalEdges.cpp
+++ b/lib/Transforms/Utils/BreakCriticalEdges.cpp
@@ -119,8 +119,11 @@ bool llvm::SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P) {
   //
   for (BasicBlock::iterator I = DestBB->begin();
        PHINode *PN = dyn_cast<PHINode>(I); ++I) {
-    // We no longer enter through TIBB, now we come in through NewBB.
-    PN->replaceUsesOfWith(TIBB, NewBB);
+    // We no longer enter through TIBB, now we come in through NewBB.  Revector
+    // exactly one entry in the PHI node that used to come from TIBB to come
+    // from NewBB.
+    Value *InVal = PN->removeIncomingValue(TIBB, false);
+    PN->addIncoming(InVal, NewBB);
   }
 
   // If we don't have a pass object, we can't update anything...