Replace text annotations with explicit file/line for debug info (#967)

Rather than storing debug info as text annotations, store explicit file and line information. This will make it easier to experiment with outputting other serializations or representations (e.g. source maps), and will allow outputting debug info for binaries as well.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/wasm.h b/src/wasm.h
index 9cfcb4ca8..b27fe6acb 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -510,8 +510,10 @@ public:
   std::vector<Name> localNames;
   std::map<Name, Index> localIndices;
 
-  // node annotations, printed alongside the node in the text format
-  std::unordered_map<Expression*, std::string> annotations;
+  struct DebugLocation {
+    uint32_t fileIndex, lineNumber;
+  };
+  std::unordered_map<Expression*, DebugLocation> debugLocations;
 
   Function() : result(none) {}
 
@@ -647,6 +649,7 @@ public:
   Name start;
 
   std::vector<UserSection> userSections;
+  std::vector<std::string> debugInfoFileNames;
 
   MixedArena allocator;