carbon-lang/toolchain/check/testdata/function/definition/syntactic_merge.carbon

// 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
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/definition/syntactic_merge.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/definition/syntactic_merge.carbon

// --- basic.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo(a: C);
fn Foo(a: C) {}

fn Bar(a: D);
fn Bar(a: D) {}

// --- spacing.carbon

library "[[@TEST_NAME]]";

class C {}

fn Foo [ ] ( a : C );
fn Foo[](a: C) {}

// --- fail_parens.carbon

library "[[@TEST_NAME]]";

class C {}

fn Foo(a: C);
// CHECK:STDERR: fail_parens.carbon:[[@LINE+7]]:11: error: redeclaration syntax differs here [RedeclParamSyntaxDiffers]
// CHECK:STDERR: fn Foo(a: (C)) {}
// CHECK:STDERR:           ^
// CHECK:STDERR: fail_parens.carbon:[[@LINE-4]]:11: note: comparing with previous declaration here [RedeclParamSyntaxPrevious]
// CHECK:STDERR: fn Foo(a: C);
// CHECK:STDERR:           ^
// CHECK:STDERR:
fn Foo(a: (C)) {}

// --- fail_only_implicit_params.carbon

library "[[@TEST_NAME]]";

class C {}

// CHECK:STDERR: fail_only_implicit_params.carbon:[[@LINE+8]]:8: error: implicit parameters of functions must be constant or `self` [ImplictParamMustBeConstant]
// CHECK:STDERR: fn Foo[a: C];
// CHECK:STDERR:        ^~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_only_implicit_params.carbon:[[@LINE+4]]:1: error: semantics TODO: `function with positional parameters` [SemanticsTodo]
// CHECK:STDERR: fn Foo[a: C];
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR:
fn Foo[a: C];
// CHECK:STDERR: fail_only_implicit_params.carbon:[[@LINE+8]]:8: error: implicit parameters of functions must be constant or `self` [ImplictParamMustBeConstant]
// CHECK:STDERR: fn Foo[a: (C)] {}
// CHECK:STDERR:        ^~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_only_implicit_params.carbon:[[@LINE+4]]:1: error: semantics TODO: `function with positional parameters` [SemanticsTodo]
// CHECK:STDERR: fn Foo[a: (C)] {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn Foo[a: (C)] {}

// --- todo_fail_raw_identifier.carbon

library "[[@TEST_NAME]]";

class C {}

fn Foo(a: C);
fn Foo(a: r#C) {}

// --- two_file.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo(a: C);
fn Bar(a: D);

// --- two_file.impl.carbon

impl library "[[@TEST_NAME]]";

fn Foo(a: C) {}
fn Bar(a: D) {}

// --- fail_name_mismatch.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo(a: C);
// CHECK:STDERR: fail_name_mismatch.carbon:[[@LINE+7]]:8: error: redeclaration differs at parameter 1 [RedeclParamDiffers]
// CHECK:STDERR: fn Foo(b: D) {}
// CHECK:STDERR:        ^~~~
// CHECK:STDERR: fail_name_mismatch.carbon:[[@LINE-4]]:8: note: previous declaration's corresponding parameter here [RedeclParamPrevious]
// CHECK:STDERR: fn Foo(a: C);
// CHECK:STDERR:        ^~~~
// CHECK:STDERR:
fn Foo(b: D) {}

// --- fail_alias.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo(a: C);
// CHECK:STDERR: fail_alias.carbon:[[@LINE+7]]:11: error: redeclaration syntax differs here [RedeclParamSyntaxDiffers]
// CHECK:STDERR: fn Foo(a: D) {}
// CHECK:STDERR:           ^
// CHECK:STDERR: fail_alias.carbon:[[@LINE-4]]:11: note: comparing with previous declaration here [RedeclParamSyntaxPrevious]
// CHECK:STDERR: fn Foo(a: C);
// CHECK:STDERR:           ^
// CHECK:STDERR:
fn Foo(a: D) {}

// --- fail_deduced_alias.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo[a:! C]();
// CHECK:STDERR: fail_deduced_alias.carbon:[[@LINE+7]]:12: error: redeclaration syntax differs here [RedeclParamSyntaxDiffers]
// CHECK:STDERR: fn Foo[a:! D]() {}
// CHECK:STDERR:            ^
// CHECK:STDERR: fail_deduced_alias.carbon:[[@LINE-4]]:12: note: comparing with previous declaration here [RedeclParamSyntaxPrevious]
// CHECK:STDERR: fn Foo[a:! C]();
// CHECK:STDERR:            ^
// CHECK:STDERR:
fn Foo[a:! D]() {}

// --- todo_fail_alias_in_return.carbon

library "[[@TEST_NAME]]";

class C {}
alias D = C;

fn Foo() -> C;
fn Foo() -> D { return {}; }

// --- alias_two_file.carbon

library "[[@TEST_NAME]]";

class C {}

fn Foo(a: C);

// --- todo_fail_alias_two_file.impl.carbon

impl library "[[@TEST_NAME]]";

alias D = C;

fn Foo(a: D) {}

// --- fail_repeat_const.carbon

library "[[@TEST_NAME]]";

class C {}

fn Foo(a: const C);
// CHECK:STDERR: fail_repeat_const.carbon:[[@LINE+11]]:11: warning: `const` applied repeatedly to the same type has no additional effect [RepeatedConst]
// CHECK:STDERR: fn Foo(a: const (const C)) {}
// CHECK:STDERR:           ^~~~~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_repeat_const.carbon:[[@LINE+7]]:17: error: redeclaration syntax differs here [RedeclParamSyntaxDiffers]
// CHECK:STDERR: fn Foo(a: const (const C)) {}
// CHECK:STDERR:                 ^
// CHECK:STDERR: fail_repeat_const.carbon:[[@LINE-8]]:17: note: comparing with previous declaration here [RedeclParamSyntaxPrevious]
// CHECK:STDERR: fn Foo(a: const C);
// CHECK:STDERR:                 ^
// CHECK:STDERR:
fn Foo(a: const (const C)) {}

// CHECK:STDOUT: --- basic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT:   %Bar.type: type = fn_type @Bar [concrete]
// CHECK:STDOUT:   %Bar: %Bar.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl.loc7
// CHECK:STDOUT:     .Bar = %Bar.decl.loc10
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc7: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc7: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc7: %C = bind_name a, %a.param.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc8: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc8: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc8: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc8: %C = bind_name a, %a.param.loc8
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Bar.decl.loc10: %Bar.type = fn_decl @Bar [concrete = constants.%Bar] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc10: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref.loc10: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc10: %C = bind_name a, %a.param.loc10
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Bar.decl.loc11: %Bar.type = fn_decl @Bar [concrete = constants.%Bar] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc11: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref.loc11: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc11: %C = bind_name a, %a.param.loc11
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param.loc8: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bar(%a.param.loc11: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- spacing.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl.loc6: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc6: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc6: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc6: %C = bind_name a, %a.param.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc7: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc7: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc7: %C = bind_name a, %a.param.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param.loc7: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_parens.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc6 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc14 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl.loc6: %Foo.type.a02530.1 = fn_decl @Foo.loc6 [concrete = constants.%Foo.ddeb7d.1] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc14: %Foo.type.a02530.2 = fn_decl @Foo.loc14 [concrete = constants.%Foo.ddeb7d.2] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc6(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc14(%a.param: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_only_implicit_params.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc14 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc23 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl.loc14
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl.loc14: %Foo.type.a02530.1 = fn_decl @Foo.loc14 [concrete = constants.%Foo.ddeb7d.1] {} {}
// CHECK:STDOUT:   %Foo.decl.loc23: %Foo.type.a02530.2 = fn_decl @Foo.loc23 [concrete = constants.%Foo.ddeb7d.2] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc14();
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc23() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- todo_fail_raw_identifier.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl.loc6: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc6: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc6: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc6: %C = bind_name a, %a.param.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param.loc7: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc7: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc7: %C = bind_name a, %a.param.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param.loc7: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- two_file.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT:   %Bar.type: type = fn_type @Bar [concrete]
// CHECK:STDOUT:   %Bar: %Bar.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl
// CHECK:STDOUT:     .Bar = %Bar.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Bar.decl: %Bar.type = fn_decl @Bar [concrete = constants.%Bar] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bar(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: --- two_file.impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT:   %Bar.type: type = fn_type @Bar [concrete]
// CHECK:STDOUT:   %Bar: %Bar.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.C: type = import_ref Main//two_file, C, loaded [concrete = constants.%C]
// CHECK:STDOUT:   %Main.D: type = import_ref Main//two_file, D, loaded [concrete = constants.%C]
// CHECK:STDOUT:   %Main.import_ref.8f2: <witness> = import_ref Main//two_file, loc4_10, loaded [concrete = constants.%complete_type]
// CHECK:STDOUT:   %Main.import_ref.2c4 = import_ref Main//two_file, inst17 [no loc], unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = imports.%Main.C
// CHECK:STDOUT:     .D = imports.%Main.D
// CHECK:STDOUT:     .Foo = %Foo.decl
// CHECK:STDOUT:     .Bar = %Bar.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %default.import.loc2_24.1 = import <none>
// CHECK:STDOUT:   %default.import.loc2_24.2 = import <none>
// CHECK:STDOUT:   %Foo.decl: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, imports.%Main.C [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Bar.decl: %Bar.type = fn_decl @Bar [concrete = constants.%Bar] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref: type = name_ref D, imports.%Main.D [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C [from "two_file.carbon"] {
// CHECK:STDOUT:   complete_type_witness = imports.%Main.import_ref.8f2
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = imports.%Main.import_ref.2c4
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param: %C) [from "two_file.carbon"] {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bar(%a.param: %C) [from "two_file.carbon"] {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_name_mismatch.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc7 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc15 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type.a02530.1 = fn_decl @Foo.loc7 [concrete = constants.%Foo.ddeb7d.1] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc15: %Foo.type.a02530.2 = fn_decl @Foo.loc15 [concrete = constants.%Foo.ddeb7d.2] {
// CHECK:STDOUT:     %b.patt: %pattern_type = binding_pattern b [concrete]
// CHECK:STDOUT:     %b.param_patt: %pattern_type = value_param_pattern %b.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %b.param: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %b: %C = bind_name b, %b.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc7(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc15(%b.param: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_alias.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc7 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc15 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type.a02530.1 = fn_decl @Foo.loc7 [concrete = constants.%Foo.ddeb7d.1] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc15: %Foo.type.a02530.2 = fn_decl @Foo.loc15 [concrete = constants.%Foo.ddeb7d.2] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc7(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc15(%a.param: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_deduced_alias.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %a: %C = bind_symbolic_name a, 0 [symbolic]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc7 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc15 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type.a02530.1 = fn_decl @Foo.loc7 [concrete = constants.%Foo.ddeb7d.1] {
// CHECK:STDOUT:     %a.patt: %pattern_type = symbolic_binding_pattern a, 0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc7_8.2: %C = bind_symbolic_name a, 0 [symbolic = %a.loc7_8.1 (constants.%a)]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc15: %Foo.type.a02530.2 = fn_decl @Foo.loc15 [concrete = constants.%Foo.ddeb7d.2] {
// CHECK:STDOUT:     %a.patt: %pattern_type = symbolic_binding_pattern a, 0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a.loc15_8.2: %C = bind_symbolic_name a, 0 [symbolic = %a.loc15_8.1 (constants.%a)]
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Foo.loc7(%a.loc7_8.2: %C) {
// CHECK:STDOUT:   %a.loc7_8.1: %C = bind_symbolic_name a, 0 [symbolic = %a.loc7_8.1 (constants.%a)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Foo.loc15(%a.loc15_8.2: %C) {
// CHECK:STDOUT:   %a.loc15_8.1: %C = bind_symbolic_name a, 0 [symbolic = %a.loc15_8.1 (constants.%a)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT:   fn() {
// CHECK:STDOUT:   !entry:
// CHECK:STDOUT:     return
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Foo.loc7(constants.%a) {
// CHECK:STDOUT:   %a.loc7_8.1 => constants.%a
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Foo.loc15(constants.%a) {
// CHECK:STDOUT:   %a.loc15_8.1 => constants.%a
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- todo_fail_alias_in_return.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT:   %C.val: %C = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:     .Foo = %Foo.decl.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, %C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl.loc7: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %return.patt: %pattern_type = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %return.param.loc7: ref %C = out_param call_param0
// CHECK:STDOUT:     %return.loc7: ref %C = return_slot %return.param.loc7
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc8: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %return.patt: %pattern_type = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %return.param.loc8: ref %C = out_param call_param0
// CHECK:STDOUT:     %return.loc8: ref %C = return_slot %return.param.loc8
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo() -> %return.param.loc8: %C {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %.loc8_25.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:   %.loc8_25.2: init %C = class_init (), %return.loc8 [concrete = constants.%C.val]
// CHECK:STDOUT:   %.loc8_26: init %C = converted %.loc8_25.1, %.loc8_25.2 [concrete = constants.%C.val]
// CHECK:STDOUT:   return %.loc8_26 to %return.loc8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- alias_two_file.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param: %C);
// CHECK:STDOUT:
// CHECK:STDOUT: --- todo_fail_alias_two_file.impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [concrete]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.C: type = import_ref Main//alias_two_file, C, loaded [concrete = constants.%C]
// CHECK:STDOUT:   %Main.import_ref.8f2: <witness> = import_ref Main//alias_two_file, loc4_10, loaded [concrete = constants.%complete_type]
// CHECK:STDOUT:   %Main.import_ref.2c4 = import_ref Main//alias_two_file, inst17 [no loc], unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = imports.%Main.C
// CHECK:STDOUT:     .Foo = %Foo.decl
// CHECK:STDOUT:     .D = %D
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %default.import.loc2_30.1 = import <none>
// CHECK:STDOUT:   %default.import.loc2_30.2 = import <none>
// CHECK:STDOUT:   %C.ref: type = name_ref C, imports.%Main.C [concrete = constants.%C]
// CHECK:STDOUT:   %D: type = bind_alias D, imports.%Main.C [concrete = constants.%C]
// CHECK:STDOUT:   %Foo.decl: %Foo.type = fn_decl @Foo [concrete = constants.%Foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %C = value_param call_param0
// CHECK:STDOUT:     %D.ref: type = name_ref D, file.%D [concrete = constants.%C]
// CHECK:STDOUT:     %a: %C = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C [from "alias_two_file.carbon"] {
// CHECK:STDOUT:   complete_type_witness = imports.%Main.import_ref.8f2
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = imports.%Main.import_ref.2c4
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo(%a.param: %C) [from "alias_two_file.carbon"] {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_repeat_const.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %const: type = const_type %C [concrete]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %const [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.1: type = fn_type @Foo.loc6 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.1: %Foo.type.a02530.1 = struct_value () [concrete]
// CHECK:STDOUT:   %Foo.type.a02530.2: type = fn_type @Foo.loc18 [concrete]
// CHECK:STDOUT:   %Foo.ddeb7d.2: %Foo.type.a02530.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .Foo = %Foo.decl.loc6
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %Foo.decl.loc6: %Foo.type.a02530.1 = fn_decl @Foo.loc6 [concrete = constants.%Foo.ddeb7d.1] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %const = value_param call_param0
// CHECK:STDOUT:     %.loc6: type = splice_block %const [concrete = constants.%const] {
// CHECK:STDOUT:       %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:       %const: type = const_type %C.ref [concrete = constants.%const]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %a: %const = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Foo.decl.loc18: %Foo.type.a02530.2 = fn_decl @Foo.loc18 [concrete = constants.%Foo.ddeb7d.2] {
// CHECK:STDOUT:     %a.patt: %pattern_type = binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %const = value_param call_param0
// CHECK:STDOUT:     %.loc18: type = splice_block %const.loc18_11 [concrete = constants.%const] {
// CHECK:STDOUT:       %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:       %const.loc18_18: type = const_type %C.ref [concrete = constants.%const]
// CHECK:STDOUT:       %const.loc18_11: type = const_type %const.loc18_18 [concrete = constants.%const]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %a: %const = bind_name a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc6(%a.param: %const);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo.loc18(%a.param: %const) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT: