Remove -disable-with-critical-edge flag.

Author: atrick

lib/SILOptimizer/Transforms/ARCCodeMotion.cpp

@@ -96,10 +96,6 @@ STATISTIC(NumReleasesHoisted, "Number of releases hoisted");
 
 llvm::cl::opt<bool> DisableARCCodeMotion("disable-arc-cm", llvm::cl::init(false));
 
-/// Disable optimization if we have to break critical edges in the function.
-llvm::cl::opt<bool>
-DisableIfWithCriticalEdge("disable-with-critical-edge", llvm::cl::init(false));
-
 //===----------------------------------------------------------------------===//
 //                             Block State 
 //===----------------------------------------------------------------------===//
@@ -1156,11 +1152,6 @@ class ARCCodeMotion : public SILFunctionTransform {
     if (!F->shouldOptimize())
       return;
 
-    // Return if there is critical edge and we are disabling critical edge
-    // splitting.
-    if (DisableIfWithCriticalEdge && hasCriticalEdges(*F, false))
-      return;
-
     LLVM_DEBUG(llvm::dbgs() << "*** ARCCM on function: " << F->getName()
                             << " ***\n");