Enable if-conversion for ARM by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42156 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMTargetMachine.cpp b/lib/Target/ARM/ARMTargetMachine.cpp
index d5f0ffa..4794cd4 100644
--- a/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/lib/Target/ARM/ARMTargetMachine.cpp
@@ -25,8 +25,8 @@
 
 static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
                               cl::desc("Disable load store optimization pass"));
-static cl::opt<bool> EnableIfConversion("enable-arm-if-conversion", cl::Hidden,
-                              cl::desc("Enable if-conversion pass"));
+static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
+                              cl::desc("Disable if-conversion pass"));
 
 namespace {
   // Register the target.
@@ -127,7 +127,7 @@
   if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
     PM.add(createARMLoadStoreOptimizationPass());
   
-  if (!Fast && EnableIfConversion && !Subtarget.isThumb())
+  if (!Fast && !DisableIfConversion && !Subtarget.isThumb())
     PM.add(createIfConverterPass());
 
   PM.add(createARMConstantIslandPass());