3 files changed, 19 insertions, 5 deletions
diff --git a/src/passes/MinifyImportsAndExports.cpp b/src/passes/MinifyImportsAndExports.cpp
index f32859384..007f4b629 100644
--- a/src/passes/MinifyImportsAndExports.cpp
+++ b/src/passes/MinifyImportsAndExports.cpp
@@ -42,7 +42,12 @@
 namespace wasm {
 
 struct MinifyImportsAndExports : public Pass {
+  bool minifyExports;
 
+public:
+  explicit MinifyImportsAndExports(bool minifyExports):minifyExports(minifyExports) {}
+
+private:
   // Generates minified names that are valid in JS.
   // Names are computed lazily.
   class MinifiedNames {
@@ -150,9 +155,12 @@ struct MinifyImportsAndExports : public Pass {
     };
     ModuleUtils::iterImportedGlobals(*module, processImport);
     ModuleUtils::iterImportedFunctions(*module, processImport);
-    // Minify the exported names.
-    for (auto& curr : module->exports) {
-      process(curr->name);
+
+    if (minifyExports) {
+      // Minify the exported names.
+      for (auto& curr : module->exports) {
+        process(curr->name);
+      }
     }
     module->updateMaps();
     // Emit the mapping.
@@ -162,8 +170,12 @@ struct MinifyImportsAndExports : public Pass {
   }
 };
 
+Pass *createMinifyImportsPass() {
+  return new MinifyImportsAndExports(false);
+}
+
 Pass *createMinifyImportsAndExportsPass() {
-  return new MinifyImportsAndExports();
+  return new MinifyImportsAndExports(true);
 }
 
 } // namespace wasm
diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index 26f771277..d2478eaba 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -95,7 +95,8 @@ void PassRegistry::registerPasses() {
   registerPass("merge-blocks", "merges blocks to their parents", createMergeBlocksPass);
   registerPass("merge-locals", "merges locals when beneficial", createMergeLocalsPass);
   registerPass("metrics", "reports metrics", createMetricsPass);
-  registerPass("minify-imports-and-exports", "minifies import and export names, and emits a mapping to the minified ones", createMinifyImportsAndExportsPass);
+  registerPass("minify-imports", "minifies import names (only those, and not export names), and emits a mapping to the minified ones", createMinifyImportsPass);
+  registerPass("minify-imports-and-exports", "minifies both import and export names, and emits a mapping to the minified ones", createMinifyImportsAndExportsPass);
   registerPass("nm", "name list", createNameListPass);
   registerPass("optimize-instructions", "optimizes instruction combinations", createOptimizeInstructionsPass);
   registerPass("optimize-stack-ir", "optimize Stack IR", createOptimizeStackIRPass);
diff --git a/src/passes/passes.h b/src/passes/passes.h
index 1fd07a4f6..ec40a60f2 100644
--- a/src/passes/passes.h
+++ b/src/passes/passes.h
@@ -51,6 +51,7 @@ Pass* createMemoryPackingPass();
 Pass* createMergeBlocksPass();
 Pass* createMergeLocalsPass();
 Pass* createMinifiedPrinterPass();
+Pass* createMinifyImportsPass();
 Pass* createMinifyImportsAndExportsPass();
 Pass* createMetricsPass();
 Pass* createNameListPass();