Move --separate-data-segments into a pass so it can be run from wasm-opt (#6088)

Because we currently strip some data segments (i.e. EM_JS strings)
during `--post-emscripten` this is too late as `--separate-data-segments`
always runs in `wasm-emscripten-finalize`.

Once emscripten switches over to using the pass directly we can remove
the support from `wasm-emscripten-finalize`

1 files changed, 22 insertions, 0 deletions

diff --git a/test/lit/passes/separate-data-segments.wast b/test/lit/passes/separate-data-segments.wast
new file mode 100644
index 000000000..ad921df79
--- /dev/null
+++ b/test/lit/passes/separate-data-segments.wast
@@ -0,0 +1,22 @@
+;; RUN: wasm-opt %s --separate-data-segments=%t.data --pass-arg=separate-data-segments-global-base@1024 -S -o - | filecheck %s
+;; RUN: cat %t.data | filecheck %s --check-prefix=CHECK-DATA
+
+(module
+  ;; CHECK:      (memory $0 1 1)
+  (memory 1 1)
+
+  ;; CHECK-NOT (data
+  (data (i32.const 1024) "hello world\n")
+
+  ;; CHECK:      (func $foo
+  (func $foo
+    (call $bar)
+  )
+
+  ;; CHECK:      (func $bar
+  (func $bar
+    (call $foo)
+  )
+)
+
+;; CHECK-DATA: {{^}}hello world{{$}}