Fixes element instance for imported global func ref (#2141)

Signed-off-by: Takeshi Yoneda <t.y.mathetake@gmail.com>

internal/integration_test/fuzzcases/fuzzcases_test.go

@@ -1065,8 +1065,15 @@ func Test2136(t *testing.T) {
 }
 
 func Test2137(t *testing.T) {
-	r := wazero.NewRuntime(context.Background())
-	_, err := r.CompileModule(ctx, getWasmBinary(t, "2137"))
-	require.NoError(t, err)
-	require.NoError(t, r.Close(ctx))
+	if !platform.CompilerSupported() {
+		return
+	}
+	nodiff.RequireNoDiffT(t, getWasmBinary(t, "2137"), true, true)
+}
+
+func Test2140(t *testing.T) {
+	if !platform.CompilerSupported() {
+		return
+	}
+	nodiff.RequireNoDiffT(t, getWasmBinary(t, "2140"), true, true)
 }

internal/integration_test/fuzzcases/testdata/2140.wat

@@ -0,0 +1,4 @@
+(module
+  (import "hh" "" (global (;0;) funcref))
+  (elem (;0;) funcref (ref.null func) (ref.null func) (ref.null func) (global.get 0) (ref.null func))
+)

internal/wasm/store.go

@@ -179,8 +179,13 @@ func (m *ModuleInstance) buildElementInstances(elements []ElementSegment) {
 			inst := make([]Reference, len(inits))
 			m.ElementInstances[i] = inst
 			for j, idx := range inits {
-				if idx != ElementInitNullReference {
-					inst[j] = m.Engine.FunctionInstanceReference(idx)
+				if index, ok := unwrapElementInitGlobalReference(idx); ok {
+					global := m.Globals[index]
+					inst[j] = Reference(global.Val)
+				} else {
+					if idx != ElementInitNullReference {
+						inst[j] = m.Engine.FunctionInstanceReference(idx)
+					}
 				}
 			}
 		}