wasm-opt source map support (#1557)

* support source map input in wasm-opt, refactoring the loading code into wasm-io

* use wasm-io in wasm-as

* support output source maps in wasm-opt

* add a test for wasm-opt and source maps

1 files changed, 4 insertions, 3 deletions

diff --git a/src/wasm-io.h b/src/wasm-io.h
index cbb8f36c8..2dfdbae6c 100644
--- a/src/wasm-io.h
+++ b/src/wasm-io.h
@@ -40,10 +40,11 @@ public:
   // read text
   void readText(std::string filename, Module& wasm);
   // read binary
-  void readBinary(std::string filename, Module& wasm);
+  void readBinary(std::string filename, Module& wasm,
+                  std::string sourceMapFilename="");
   // read text or binary, checking the contents for what it is
-  void read(std::string filename, Module& wasm);
-
+  void read(std::string filename, Module& wasm,
+            std::string sourceMapFilename="");
   // check whether a file is a wasm binary
   bool isBinaryFile(std::string filename);
 };