// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/if/fail_reachable_fallthrough.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if/fail_reachable_fallthrough.carbon

fn If1(b: bool) -> i32 {
  if (b) {
    return 1;
  } else {
  }
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+4]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
// CHECK:STDERR:
}

fn If2(b: bool) -> i32 {
  if (b) {
  } else {
    return 2;
  }
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+4]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
// CHECK:STDERR:
}

fn If3(b: bool) -> i32 {
  if (b) {
    return 1;
  }
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+3]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
}

// CHECK:STDOUT: --- fail_reachable_fallthrough.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %Bool.type: type = fn_type @Bool [template]
// CHECK:STDOUT:   %.1: type = tuple_type () [template]
// CHECK:STDOUT:   %Bool: %Bool.type = struct_value () [template]
// CHECK:STDOUT:   %Int32.type: type = fn_type @Int32 [template]
// CHECK:STDOUT:   %Int32: %Int32.type = struct_value () [template]
// CHECK:STDOUT:   %If1.type: type = fn_type @If1 [template]
// CHECK:STDOUT:   %If1: %If1.type = struct_value () [template]
// CHECK:STDOUT:   %.2: i32 = int_literal 1 [template]
// CHECK:STDOUT:   %If2.type: type = fn_type @If2 [template]
// CHECK:STDOUT:   %If2: %If2.type = struct_value () [template]
// CHECK:STDOUT:   %.3: i32 = int_literal 2 [template]
// CHECK:STDOUT:   %If3.type: type = fn_type @If3 [template]
// CHECK:STDOUT:   %If3: %If3.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     .Bool = %import_ref.1
// CHECK:STDOUT:     .Int32 = %import_ref.2
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %import_ref.1: %Bool.type = import_ref Core//prelude/types/bool, inst+5, loaded [template = constants.%Bool]
// CHECK:STDOUT:   %import_ref.2: %Int32.type = import_ref Core//prelude/types, inst+15, loaded [template = constants.%Int32]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .If1 = %If1.decl
// CHECK:STDOUT:     .If2 = %If2.decl
// CHECK:STDOUT:     .If3 = %If3.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %If1.decl: %If1.type = fn_decl @If1 [template = constants.%If1] {
// CHECK:STDOUT:     %b.patt: bool = binding_pattern b
// CHECK:STDOUT:     %b.param_patt: bool = value_param_pattern %b.patt, runtime_param0
// CHECK:STDOUT:     %return.patt: i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: i32 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT:     %.loc11_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT:     %.loc11_11.2: type = converted %bool.make_type, %.loc11_11.1 [template = bool]
// CHECK:STDOUT:     %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:     %.loc11_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:     %.loc11_20.2: type = converted %int.make_type_32, %.loc11_20.1 [template = i32]
// CHECK:STDOUT:     %b.param: bool = value_param runtime_param0
// CHECK:STDOUT:     %b: bool = bind_name b, %b.param
// CHECK:STDOUT:     %return.param: ref i32 = out_param runtime_param1
// CHECK:STDOUT:     %return: ref i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %If2.decl: %If2.type = fn_decl @If2 [template = constants.%If2] {
// CHECK:STDOUT:     %b.patt: bool = binding_pattern b
// CHECK:STDOUT:     %b.param_patt: bool = value_param_pattern %b.patt, runtime_param0
// CHECK:STDOUT:     %return.patt: i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: i32 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT:     %.loc22_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT:     %.loc22_11.2: type = converted %bool.make_type, %.loc22_11.1 [template = bool]
// CHECK:STDOUT:     %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:     %.loc22_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:     %.loc22_20.2: type = converted %int.make_type_32, %.loc22_20.1 [template = i32]
// CHECK:STDOUT:     %b.param: bool = value_param runtime_param0
// CHECK:STDOUT:     %b: bool = bind_name b, %b.param
// CHECK:STDOUT:     %return.param: ref i32 = out_param runtime_param1
// CHECK:STDOUT:     %return: ref i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %If3.decl: %If3.type = fn_decl @If3 [template = constants.%If3] {
// CHECK:STDOUT:     %b.patt: bool = binding_pattern b
// CHECK:STDOUT:     %b.param_patt: bool = value_param_pattern %b.patt, runtime_param0
// CHECK:STDOUT:     %return.patt: i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: i32 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT:     %.loc33_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT:     %.loc33_11.2: type = converted %bool.make_type, %.loc33_11.1 [template = bool]
// CHECK:STDOUT:     %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:     %.loc33_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:     %.loc33_20.2: type = converted %int.make_type_32, %.loc33_20.1 [template = i32]
// CHECK:STDOUT:     %b.param: bool = value_param runtime_param0
// CHECK:STDOUT:     %b: bool = bind_name b, %b.param
// CHECK:STDOUT:     %return.param: ref i32 = out_param runtime_param1
// CHECK:STDOUT:     %return: ref i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bool() -> type = "bool.make_type";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Int32() -> type = "int.make_type_32";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @If1(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %b.ref: bool = name_ref b, %b
// CHECK:STDOUT:   if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT:   %.loc13: i32 = int_literal 1 [template = constants.%.2]
// CHECK:STDOUT:   return %.loc13
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT:   br !if.done
// CHECK:STDOUT:
// CHECK:STDOUT: !if.done:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @If2(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %b.ref: bool = name_ref b, %b
// CHECK:STDOUT:   if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT:   br !if.done
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT:   %.loc25: i32 = int_literal 2 [template = constants.%.3]
// CHECK:STDOUT:   return %.loc25
// CHECK:STDOUT:
// CHECK:STDOUT: !if.done:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @If3(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %b.ref: bool = name_ref b, %b
// CHECK:STDOUT:   if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT:   %.loc35: i32 = int_literal 1 [template = constants.%.2]
// CHECK:STDOUT:   return %.loc35
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT: }
// CHECK:STDOUT: