Enable the red zone on x86-64 by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63078 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index fd577c7..49f1e4d 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -169,7 +169,7 @@
 DisableRedZoneOption("disable-red-zone",
            cl::desc("Do not emit code that uses the red zone."),
            cl::location(DisableRedZone),
-           cl::init(true));
+           cl::init(false));
 
 //---------------------------------------------------------------------------
 // TargetMachine Class