Rename -disable-required-unwind-tables to unwind-tables-optional.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49389 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index e6f080d..6f2f123 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -85,8 +85,8 @@
                cl::location(ExceptionHandling),
                cl::init(false));
   cl::opt<bool, true>
-  DisableUnwindTables("disable-required-unwind-tables",
-               cl::desc("Do not require unwinding info for all functions"),
+  DisableUnwindTables("unwind-tables-optional",
+               cl::desc("Generate unwinding tables only for functions that require them"),
                cl::location(UnwindTablesOptional),
                cl::init(false));