Add a failing testcase

Author: vimarsh6739

enzyme/test/MLIR/ReverseMode/alloca_scope2.mlir

@@ -0,0 +1,38 @@
+// RUN: %eopt --enzyme %s | FileCheck %s
+
+func.func @foo(%x : f64) -> f64{
+    %out = memref.alloca_scope -> (f64) {
+      %buf = memref.alloca() : memref<f64>
+      memref.store %x, %buf[] : memref<f64>
+      %y = memref.load %buf[] : memref<f64>
+      memref.alloca_scope.return %y : f64
+    }
+    return %out  : f64
+}
+
+
+func.func @dfoo(%x: f64, %dout : f64) -> f64 {
+  %dx = enzyme.autodiff @foo(%x, %dout) {
+    activity = [#enzyme<activity enzyme_active>],
+    ret_activity = [#enzyme<acitivity enzyme_activenoneed>]
+  } : (f64, f64) -> (f64)
+  return %dx : f64
+}
+
+func.func @foo2(%x : f64) -> f64{
+    %cst = arith.constant 0.0000e+00 : f64
+      %buf = memref.alloca() : memref<f64>
+      memref.store %x, %buf[] : memref<f64>
+      %y = memref.load %buf[] : memref<f64>
+      %out = arith.addf %cst, %y : f64
+    return %out  : f64
+}
+
+
+func.func @dfoo2(%x: f64, %dout : f64) -> f64 {
+  %dx = enzyme.autodiff @foo2(%x, %dout) {
+    activity = [#enzyme<activity enzyme_active>],
+    ret_activity = [#enzyme<activity enzyme_activenoneed>]
+  } : (f64, f64) -> (f64)
+  return %dx : f64
+}