[CINN] Fix TestGelu unittest of CINN (#53859)

* [CINN] Fix TestGelu unittest of CINN

* pass if_enable_cinn

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

@@ -2083,7 +2083,6 @@ class TestGeluApproximate(TestActivation):
         np.random.seed(1024)
         x = np.random.uniform(-1, 1, self.shape).astype(self.dtype)
         out = gelu(x, approximate)
-        self.enable_cinn = False
 
         self.inputs = {'X': x}
         self.outputs = {'Out': out}
@@ -2093,6 +2092,9 @@ class TestGeluApproximate(TestActivation):
         # cpu device, lower threshold to support 1e-8 for pass the unittest
         self.rev_comp_rtol = 1e-8
         self.rev_comp_atol = 1e-8
+        # Cumulative error occurs between comp and cinn, so that we also set cinn_rtol to 1e-8 as rev_comp_rtol = 1e-8
+        self.cinn_rtol = 1e-8
+        self.cinn_atol = 1e-8
 
     def test_check_output(self):
         self.check_output(check_prim=True)
@@ -2125,9 +2127,12 @@ class TestGelu(TestActivation):
         # cpu, lower threshold to support 1e-8 for pass the unittest
         self.rev_comp_rtol = 1e-8
         self.rev_comp_atol = 1e-8
+        # Cumulative error occurs between comp and cinn, so that we also set cinn_rtol to 1e-8 as rev_comp_rtol = 1e-8
+        self.cinn_rtol = 1e-8
+        self.cinn_atol = 1e-8
 
     def if_enable_cinn(self):
-        self.enable_cinn = False
+        pass
 
     def test_check_output(self):
         self.check_output(check_prim=True)
@@ -4028,9 +4033,11 @@ create_test_act_fp16_class(TestRelu, check_prim=True)
 create_test_act_fp16_class(
     TestGelu,
     check_prim=True,
-    enable_cinn=False,
+    enable_cinn=True,
     rev_comp_rtol=1e-3,
     rev_comp_atol=1e-3,
+    cinn_rtol=1e-3,
+    cinn_atol=1e-3,
 )
 create_test_act_fp16_class(TestBRelu)
 create_test_act_fp16_class(TestRelu6)
@@ -4141,9 +4148,11 @@ create_test_act_bf16_class(TestRelu, check_prim=True)
 create_test_act_bf16_class(
     TestGelu,
     check_prim=True,
-    enable_cinn=False,
+    enable_cinn=True,
     rev_comp_rtol=1e-2,
     rev_comp_atol=1e-2,
+    cinn_rtol=1e-2,
+    cinn_atol=1e-2,
 )
 create_test_act_bf16_class(TestBRelu)
 create_test_act_bf16_class(TestRelu6)