// 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/function/builtin/fail_redefined.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/builtin/fail_redefined.carbon

fn A(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: fail_redefined.carbon:[[@LINE+7]]:1: error: redefinition of `fn A` [RedeclRedef]
// CHECK:STDERR: fn A(n: i32, m: i32) -> i32 { return n; }
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_redefined.carbon:[[@LINE-4]]:1: note: previously defined here [RedeclPrevDef]
// CHECK:STDERR: fn A(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn A(n: i32, m: i32) -> i32 { return n; }

fn B(n: i32, m: i32) -> i32 { return n; }
// CHECK:STDERR: fail_redefined.carbon:[[@LINE+7]]:1: error: redefinition of `fn B` [RedeclRedef]
// CHECK:STDERR: fn B(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_redefined.carbon:[[@LINE-4]]:1: note: previously defined here [RedeclPrevDef]
// CHECK:STDERR: fn B(n: i32, m: i32) -> i32 { return n; }
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn B(n: i32, m: i32) -> i32 = "int.sadd";

fn C(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: fail_redefined.carbon:[[@LINE+7]]:1: error: redefinition of `fn C` [RedeclRedef]
// CHECK:STDERR: fn C(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_redefined.carbon:[[@LINE-4]]:1: note: previously defined here [RedeclPrevDef]
// CHECK:STDERR: fn C(n: i32, m: i32) -> i32 = "int.sadd";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn C(n: i32, m: i32) -> i32 = "int.sadd";

// CHECK:STDOUT: --- fail_redefined.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [template]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [template]
// CHECK:STDOUT:   %A.type: type = fn_type @A [template]
// CHECK:STDOUT:   %A: %A.type = struct_value () [template]
// CHECK:STDOUT:   %.type.b6a92a.1: type = fn_type @.1 [template]
// CHECK:STDOUT:   %.d852be.1: %.type.b6a92a.1 = struct_value () [template]
// CHECK:STDOUT:   %B.type: type = fn_type @B [template]
// CHECK:STDOUT:   %B: %B.type = struct_value () [template]
// CHECK:STDOUT:   %.type.b6a92a.2: type = fn_type @.2 [template]
// CHECK:STDOUT:   %.d852be.2: %.type.b6a92a.2 = struct_value () [template]
// CHECK:STDOUT:   %C.type: type = fn_type @C [template]
// CHECK:STDOUT:   %C: %C.type = struct_value () [template]
// CHECK:STDOUT:   %.type.b6a92a.3: type = fn_type @.3 [template]
// CHECK:STDOUT:   %.d852be.3: %.type.b6a92a.3 = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .A = %A.decl
// CHECK:STDOUT:     .B = %B.decl
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %A.decl: %A.type = fn_decl @A [template = constants.%A] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc11_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc11_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc11_9: type = splice_block %i32.loc11_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc11_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc11_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc11_17: type = splice_block %i32.loc11_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc11_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc11_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %.decl.loc19: %.type.b6a92a.1 = fn_decl @.1 [template = constants.%.d852be.1] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc19_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc19_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc19_9: type = splice_block %i32.loc19_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc19_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc19_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc19_17: type = splice_block %i32.loc19_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc19_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc19_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %B.decl: %B.type = fn_decl @B [template = constants.%B] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc21_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc21_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc21_9: type = splice_block %i32.loc21_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc21_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc21_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc21_17: type = splice_block %i32.loc21_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc21_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc21_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %.decl.loc29: %.type.b6a92a.2 = fn_decl @.2 [template = constants.%.d852be.2] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc29_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc29_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc29_9: type = splice_block %i32.loc29_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc29_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc29_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc29_17: type = splice_block %i32.loc29_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc29_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc29_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: %C.type = fn_decl @C [template = constants.%C] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc31_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc31_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc31_9: type = splice_block %i32.loc31_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc31_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc31_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc31_17: type = splice_block %i32.loc31_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc31_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc31_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %.decl.loc39: %.type.b6a92a.3 = fn_decl @.3 [template = constants.%.d852be.3] {
// CHECK:STDOUT:     %n.patt: %i32 = binding_pattern n
// CHECK:STDOUT:     %n.param_patt: %i32 = value_param_pattern %n.patt, runtime_param0
// CHECK:STDOUT:     %m.patt: %i32 = binding_pattern m
// CHECK:STDOUT:     %m.param_patt: %i32 = value_param_pattern %m.patt, runtime_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc39_25: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:     %i32.loc39_25: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     %n.param: %i32 = value_param runtime_param0
// CHECK:STDOUT:     %.loc39_9: type = splice_block %i32.loc39_9 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc39_9: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc39_9: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %n: %i32 = bind_name n, %n.param
// CHECK:STDOUT:     %m.param: %i32 = value_param runtime_param1
// CHECK:STDOUT:     %.loc39_17: type = splice_block %i32.loc39_17 [template = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc39_17: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT:       %i32.loc39_17: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %m: %i32 = bind_name m, %m.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param runtime_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.1(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %n.ref: %i32 = name_ref n, %n
// CHECK:STDOUT:   return %n.ref
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %n.ref: %i32 = name_ref n, %n
// CHECK:STDOUT:   return %n.ref
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.2(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @.3(%n.param_patt: %i32, %m.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT: