support gather test on prim and cinn (#51376)

* support gather test on prim and cinn

* reset timeout for gather

paddle/fluid/prim/api/composite_backward/composite_backward_api.h

@@ -59,7 +59,11 @@ void gather_grad(const Tensor& x,
   std::vector<int> reverse_perm(tmp_perm);
   // make origin ranks
   for (int i = 0; i < static_cast<int>(tmp_perm.size()); ++i) {
+    if (tmp_perm[i] >= 0) {
       reverse_perm[tmp_perm[i]] = i;
+    } else {
+      reverse_perm[tmp_perm[i] + tmp_perm.size()] = i;
+    }
   }
 
   // transpose out_grad and zero grad to target rank.

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -982,7 +982,7 @@ set_tests_properties(test_matmul_op PROPERTIES TIMEOUT 120)
 set_tests_properties(test_nearest_interp_v2_op PROPERTIES TIMEOUT 120)
 set_tests_properties(test_trilinear_interp_op PROPERTIES TIMEOUT 120)
 set_tests_properties(test_bicubic_interp_v2_op PROPERTIES TIMEOUT 120)
-set_tests_properties(test_gather_op PROPERTIES TIMEOUT 180)
+set_tests_properties(test_gather_op PROPERTIES TIMEOUT 200)
 set_tests_properties(test_static_save_load PROPERTIES TIMEOUT 250)
 set_tests_properties(test_pylayer_op PROPERTIES TIMEOUT 120)
 set_tests_properties(test_paddle_save_load_binary PROPERTIES TIMEOUT 120)
@@ -1217,7 +1217,8 @@ set(TEST_CINN_OPS
     test_transpose_op
     test_reshape_op
     test_mean_op
-    test_unsqueeze2_op)
+    test_unsqueeze2_op
+    test_gather_op)
 
 foreach(TEST_CINN_OPS ${TEST_CINN_OPS})
   if(WITH_CINN)

python/paddle/fluid/tests/unittests/test_gather_op.py

@@ -35,6 +35,7 @@ class TestGatherOp(OpTest):
         self.op_type = "gather"
         self.python_api = paddle.gather
         self.config()
+        self.prim_op_type = "prim"
         xnp = np.random.random(self.x_shape).astype(self.x_type)
         self.inputs = {
             'X': xnp,
@@ -46,7 +47,7 @@ class TestGatherOp(OpTest):
         self.check_output(check_eager=True)
 
     def test_check_grad(self):
-        self.check_grad(['X'], 'Out', check_eager=True)
+        self.check_grad(['X'], 'Out', check_eager=True, check_prim=True)
 
     def config(self):
         """