Revert 89021. It's miscompiling llvm-gcc driver driver at -O0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89082 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/PHIElimination.cpp

@@ -39,7 +39,7 @@ STATISTIC(NumSplits, "Number of critical edges split on demand");
 static cl::opt<bool>
 SplitEdges("split-phi-edges",
            cl::desc("Split critical edges during phi elimination"),
-           cl::init(true), cl::Hidden);
+           cl::init(false), cl::Hidden);
 
 char PHIElimination::ID = 0;
 static RegisterPass<PHIElimination>