[SimpleLoopUnswitch] Allow threshold to be specified zero or more times

Differential Revision: https://reviews.llvm.org/D110594

diff --git a/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
index eb068fa..c768f35 100644 (file)
--- a/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
+++ b/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
@@ -81,6 +81,7 @@ static cl::opt<bool> EnableNonTrivialUnswitch(
 
 static cl::opt<int>
     UnswitchThreshold("unswitch-threshold", cl::init(50), cl::Hidden,
+                      cl::ZeroOrMore,
                       cl::desc("The cost threshold for unswitching a loop."));
 
 static cl::opt<bool> EnableUnswitchCostMultiplier(