update option description
diff --git a/llvm/tools/llc/NewPMDriver.cpp b/llvm/tools/llc/NewPMDriver.cpp
index 4ae3de1..eb80f11 100644
--- a/llvm/tools/llc/NewPMDriver.cpp
+++ b/llvm/tools/llc/NewPMDriver.cpp
@@ -48,10 +48,11 @@
using namespace llvm;
-static cl::opt<std::string>
- RegAllocPasses("regalloc-npm",
- cl::desc("Register allocator to use for new pass manager"),
- cl::Hidden);
+static cl::opt<std::string> RegAllocPasses(
+ "regalloc-npm",
+ cl::desc("Register allocator pipeline for the new pass manager. Same as "
+ "--passes, but only regalloc passes can be used here."),
+ cl::Hidden);
static cl::opt<bool>
DebugPM("debug-pass-manager", cl::Hidden,
