From 5a39ddb75c9568bbd08e723a7b5b8b28cd59cc62 Mon Sep 17 00:00:00 2001
From: Alon Zakai <azakai@google.com>
Date: Fri, 20 Dec 2019 14:06:38 -0800
Subject: [PATCH] Strip DWARF in finalize, to avoid keeping it around til later
 unnecessarily

---
 src/tools/wasm-emscripten-finalize.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/tools/wasm-emscripten-finalize.cpp b/src/tools/wasm-emscripten-finalize.cpp
index a32a265cd43..9ade001ef93 100644
--- a/src/tools/wasm-emscripten-finalize.cpp
+++ b/src/tools/wasm-emscripten-finalize.cpp
@@ -310,6 +310,14 @@ int main(int argc, const char* argv[]) {
     passRunner.run();
   }
 
+  // If DWARF is unused, strip it out. This avoids us keeping it alive
+  // until wasm-opt strips it later.
+  if (!DWARF) {
+    PassRunner passRunner(&wasm);
+    passRunner.add("strip-dwarf");
+    passRunner.run();
+  }
+
   Output output(outfile, emitBinary ? Flags::Binary : Flags::Text);
   ModuleWriter writer;
   writer.setDebugInfo(debugInfo);