[mlir][quant] output spec verification check for quant.region

We can have validation test for quant.region having incompatible output spec.

Reviewed By: stellaraccident

Differential Revision: https://reviews.llvm.org/D128245

Author: Lewuathe

mlir/test/Dialect/Quant/quant_region.mlir

@@ -70,6 +70,36 @@ func.func @unmatched_primitive(%arg0: tensor<4xf32>, %arg1: tensor<4xf32>, %arg2
 
 // -----
 
+func.func @unmatched_quantize(%arg0: tensor<4xf32>, %arg1: tensor<4xf32>, %arg2: tensor<4xf32>) -> (tensor<4xf32>) {
+  // @expected-error @+1 {{'quant.region' op has incompatible specification !quant.uniform<i32:f16, 4.000000e+00> and output type 'tensor<4xf32>'}}
+  %0 = "quant.region"(%arg0, %arg1, %arg2) ({
+    ^bb0(%10: tensor<4xf32>, %11: tensor<4xf32>, %12: tensor<4xf32>):
+      %13 = "foo"(%10, %11) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
+      %14 = "bar"(%13, %12) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
+      "quant.return"(%14) : (tensor<4xf32>) -> ()
+  }) {input_specs = [!quant.uniform<i8:f32, 1.0>, !quant.uniform<i8:f32, 2.0>, !quant.uniform<i8:f32, 3.0>],
+      output_specs = [!quant.uniform<i32:f16, 4.0>], logical_kernel = "xyz"}
+    : (tensor<4xf32>, tensor<4xf32>, tensor<4xf32>) -> (tensor<4xf32>)
+  return %0 : tensor<4xf32>
+}
+
+// -----
+
+func.func @unmatched_primitive(%arg0: tensor<4xf32>, %arg1: tensor<4xf32>, %arg2: tensor<4xf32>) -> (tensor<4xf32>) {
+  // @expected-error @+1 {{'quant.region' op has incompatible specification i32 and output type 'tensor<4xf32>'}}
+  %0 = "quant.region"(%arg0, %arg1, %arg2) ({
+    ^bb0(%10: tensor<4xf32>, %11: tensor<4xf32>, %12: tensor<4xf32>):
+      %13 = "foo"(%10, %11) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
+      %14 = "bar"(%13, %12) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
+      "quant.return"(%14) : (tensor<4xf32>) -> ()
+  }) {input_specs = [!quant.uniform<i8:f32, 1.0>, !quant.uniform<i8:f32, 2.0>, !quant.uniform<i32:f32, 2.0>],
+      output_specs = [i32], logical_kernel = "xyz"}
+    : (tensor<4xf32>, tensor<4xf32>, tensor<4xf32>) -> (tensor<4xf32>)
+  return %0 : tensor<4xf32>
+}
+
+// -----
+
 func.func @unmatched_number(%arg0: tensor<4xf32>, %arg1: tensor<4xf32>, %arg2: tensor<4xf32>) -> (tensor<4xf32>) {
   // @expected-error @+1 {{'quant.region' op has unmatched operands/results number and spec attributes number}}
   %0 = "quant.region"(%arg0, %arg1, %arg2) ({