1 files changed, 12 insertions, 3 deletions
diff --git a/src/wasm.h b/src/wasm.h
index 49951c14a..eb4d69fd4 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -392,14 +392,22 @@ public:
 
 class Break : public Expression {
 public:
-  Break() : Expression(BreakId), value(nullptr) {}
+  Break() : Expression(BreakId), condition(nullptr), value(nullptr) {}
 
+  Expression *condition;
   Name name;
   Expression *value;
 
   std::ostream& doPrint(std::ostream &o, unsigned indent) {
-    printOpening(o, "br ") << name;
-    incIndent(o, indent);
+    if (condition) {
+      printOpening(o, "br_if");
+      incIndent(o, indent);
+      printFullLine(o, indent, condition);
+      doIndent(o, indent) << name << '\n';
+    } else {
+      printOpening(o, "br ") << name;
+      incIndent(o, indent);
+    }
     if (value) printFullLine(o, indent, value);
     return decIndent(o, indent);
   }
@@ -1261,6 +1269,7 @@ struct WasmWalker : public WasmVisitor<void> {
       }
       void visitLabel(Label *curr) override {}
       void visitBreak(Break *curr) override {
+        parent.walk(curr->condition);
         parent.walk(curr->value);
       }
       void visitSwitch(Switch *curr) override {