Disable this patch:

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050801/027345.html

This breaks real programs and only fixes an obscure regression testcase.  A
real fix is in development.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22606 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index d8ede2734e564459f7d03543e1222cc10498b9f9..e4c0f7ed209e5f33e4cf14141409e51fb5426b21 100644 (file)
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -894,7 +894,7 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
           // Move all PHI nodes in BB to Succ if they are alive, otherwise
           // delete them.
           while (PHINode *PN = dyn_cast<PHINode>(&BB->front()))
-            if (PN->use_empty() || Succ->getSinglePredecessor() == 0) {
+            if (PN->use_empty() /*|| Succ->getSinglePredecessor() == 0*/) {
               // We can only move the PHI node into Succ if BB dominates Succ.
               // Since BB only has a single successor (Succ), the PHI nodes
               // will dominate Succ, unless Succ has multiple predecessors.  In