diff --git a/lib/Target/WebAssembly/WebAssemblyRegColoring.cpp b/lib/Target/WebAssembly/WebAssemblyRegColoring.cpp
index 9ec66595d8d..fd54701c35c 100644
--- a/lib/Target/WebAssembly/WebAssemblyRegColoring.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyRegColoring.cpp
@@ -29,6 +29,10 @@ using namespace llvm;
 
 #define DEBUG_TYPE "wasm-reg-coloring"
 
+static cl::opt<bool>
+    DisableRegColoring("disable-wasm-reg-coloring", cl::Hidden, cl::init(false),
+                       cl::desc("Disable WebAssembly register coloring"));
+
 namespace {
 class WebAssemblyRegColoring final : public MachineFunctionPass {
 public:
@@ -76,6 +80,9 @@ bool WebAssemblyRegColoring::runOnMachineFunction(MachineFunction &MF) {
            << "********** Function: " << MF.getName() << '\n';
   });
 
+  if (DisableRegColoring)
+    return false;
+
   // If there are calls to setjmp or sigsetjmp, don't perform coloring. Virtual
   // registers could be modified before the longjmp is executed, resulting in
   // the wrong value being used afterwards. (See <rdar://problem/8007500>.)