// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline='func(canonicalize)' | FileCheck %s

// CHECK-LABEL: func @remove_op_with_inner_ops_pattern
func @remove_op_with_inner_ops_pattern() {
  // CHECK-NEXT: return
  "test.op_with_region_pattern"() ({
    "foo.op_with_region_terminator"() : () -> ()
  }) : () -> ()
  return
}

// CHECK-LABEL: func @remove_op_with_inner_ops_fold_no_side_effect
func @remove_op_with_inner_ops_fold_no_side_effect() {
  // CHECK-NEXT: return
  "test.op_with_region_fold_no_side_effect"() ({
    "foo.op_with_region_terminator"() : () -> ()
  }) : () -> ()
  return
}

// CHECK-LABEL: func @remove_op_with_inner_ops_fold
// CHECK-SAME: (%[[ARG_0:[a-z0-9]*]]: i32)
func @remove_op_with_inner_ops_fold(%arg0 : i32) -> (i32) {
  // CHECK-NEXT: return %[[ARG_0]]
  %0 = "test.op_with_region_fold"(%arg0) ({
    "foo.op_with_region_terminator"() : () -> ()
  }) : (i32) -> (i32)
  return %0 : i32
}

// CHECK-LABEL: func @remove_op_with_variadic_results_and_folder
// CHECK-SAME: (%[[ARG_0:[a-z0-9]*]]: i32, %[[ARG_1:[a-z0-9]*]]: i32)
func @remove_op_with_variadic_results_and_folder(%arg0 : i32, %arg1 : i32) -> (i32, i32) {
  // CHECK-NEXT: return %[[ARG_0]], %[[ARG_1]]
  %0, %1 = "test.op_with_variadic_results_and_folder"(%arg0, %arg1) : (i32, i32) -> (i32, i32)
  return %0, %1 : i32, i32
}

// CHECK-LABEL: func @test_commutative_multi
// CHECK-SAME: (%[[ARG_0:[a-z0-9]*]]: i32, %[[ARG_1:[a-z0-9]*]]: i32)
func @test_commutative_multi(%arg0: i32, %arg1: i32) -> (i32, i32) {
  // CHECK: %[[C42:.*]] = constant 42 : i32
  %c42_i32 = constant 42 : i32
  // CHECK: %[[C43:.*]] = constant 43 : i32
  %c43_i32 = constant 43 : i32
  // CHECK-NEXT: %[[O0:.*]] = "test.op_commutative"(%[[ARG_0]], %[[ARG_1]], %[[C42]], %[[C43]]) : (i32, i32, i32, i32) -> i32
  %y = "test.op_commutative"(%c42_i32, %arg0, %arg1, %c43_i32) : (i32, i32, i32, i32) -> i32

  // CHECK-NEXT: %[[O1:.*]] = "test.op_commutative"(%[[ARG_0]], %[[ARG_1]], %[[C42]], %[[C43]]) : (i32, i32, i32, i32) -> i32
  %z = "test.op_commutative"(%arg0, %c42_i32, %c43_i32, %arg1): (i32, i32, i32, i32) -> i32
  // CHECK-NEXT: return %[[O0]], %[[O1]]
  return %y, %z: i32, i32
}