1 files changed, 6 insertions, 0 deletions
diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index 3713ed8b7..878ecb3cb 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -233,6 +233,9 @@ void PassRegistry::registerPasses() {
                "removes calls to atexit(), which is valid if the C runtime "
                "will never be exited",
                createNoExitRuntimePass);
+  registerPass("once-reduction",
+               "reduces calls to code that only runs once",
+               createOnceReductionPass);
   registerPass("optimize-added-constants",
                "optimizes added constants into load/store offsets",
                createOptimizeAddedConstantsPass);
@@ -511,6 +514,9 @@ void PassRunner::addDefaultFunctionOptimizationPasses() {
 void PassRunner::addDefaultGlobalOptimizationPrePasses() {
   addIfNoDWARFIssues("duplicate-function-elimination");
   addIfNoDWARFIssues("memory-packing");
+  if (options.optimizeLevel >= 2) {
+    addIfNoDWARFIssues("once-reduction");
+  }
   if (wasm->features.hasGC() && getTypeSystem() == TypeSystem::Nominal &&
       options.optimizeLevel >= 2) {
     addIfNoDWARFIssues("cfp");