Add sourcemap support to wasm-metadce and wasm-merge (#6372)

2 files changed, 39 insertions, 0 deletions

diff --git a/test/lit/metadce/sourcemap.wat b/test/lit/metadce/sourcemap.wat
new file mode 100644
index 000000000..bf695fd21
--- /dev/null
+++ b/test/lit/metadce/sourcemap.wat
@@ -0,0 +1,26 @@
+;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
+;; RUN: wasm-metadce %s --graph-file %s.json -S -o - | filecheck %s
+;; RUN: wasm-as %s -o %t.wasm --source-map %t.map
+;; RUN: wasm-metadce %t.wasm --input-source-map %t.map --graph-file %s.json -o %t.out.wasm --output-source-map %t.out.map
+;; RUN: wasm-dis %t.out.wasm --source-map %t.out.map -o - | filecheck %s
+
+;; Test that sourcemap information is preserved
+
+(module
+  ;;@ a:1:1
+  (func (export "f")
+     ;;@ a:2:1
+     (nop)
+     ;;@ a:3:1
+  )
+)
+;; CHECK:      (type $0 (func))
+
+;; CHECK:      (export "f" (func $0))
+
+;; CHECK:      ;;@ a:1:1
+;; CHECK-NEXT: (func $0
+;; CHECK-NEXT:  ;;@ a:2:1
+;; CHECK-NEXT:  (nop)
+;; CHECK-NEXT:  ;;@ a:3:1
+;; CHECK-NEXT: )
diff --git a/test/lit/metadce/sourcemap.wat.json b/test/lit/metadce/sourcemap.wat.json
new file mode 100644
index 000000000..4b2028140
--- /dev/null
+++ b/test/lit/metadce/sourcemap.wat.json
@@ -0,0 +1,13 @@
+[
+  {
+    "name": "root",
+    "reaches": [
+      "f"
+    ],
+    "root": true
+  },
+  {
+    "name": "f",
+    "export": "f"
+  }
+]