carbon-lang/toolchain/check/testdata/impl/impl_thunk.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
//
// EXTRA-ARGS: --no-prelude-import
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/impl_thunk.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/impl_thunk.carbon

// --- no_thunk_param_name_differs.carbon

library "[[@TEST_NAME]]";

interface I { fn F(x: Self); }

// This is OK, and does not require a thunk despite the parameter name differing.
class C {
  impl as I {
    fn F(not_x: C);
  }
}

// --- struct_conversion.carbon

library "[[@TEST_NAME]]";

interface I {
  fn F(x: {.a: (), .b: {}}) -> {.c: (), .d: {}};
}

impl () as I {
  //@dump-sem-ir-begin
  fn F(y: {.b: {}, .a: ()}) -> {.d: {}, .c: ()};
  //@dump-sem-ir-end
}

// --- inheritance_conversion.carbon

library "[[@TEST_NAME]]";

base class A {}
base class B { extend base: A; }
class C { extend base: B; }

interface X {
  fn F[addr self: Self*](other: Self*) -> Self*;
}

impl B as X {
  //@dump-sem-ir-begin
  fn F[addr self: A*](other: A*) -> C*;
  //@dump-sem-ir-end
}

// --- inheritance_value_conversion.carbon

library "[[@TEST_NAME]]";

base class A {}
class B { extend base: A; }

interface X {
  fn F[self: Self](other: Self);
}

impl B as X {
  //@dump-sem-ir-begin
  fn F[self: A](other: A);
  //@dump-sem-ir-end
}

// --- inheritance_value_conversion_pointer.carbon

library "[[@TEST_NAME]]";

base class A {}
base class B { extend base: A; }
class C { extend base: B; }

interface X {
  fn F[addr self: Self*](other: Self*) -> Self*;
}

impl B as X {
  //@dump-sem-ir-begin
  fn F[addr self: A*](other: A*) -> C*;
  //@dump-sem-ir-end
}

// --- fail_inheritance_value_conversion_copy_return.carbon

library "[[@TEST_NAME]]";

base class A {}
class B { extend base: A; }

interface X {
  fn F() -> Self;
}

impl A as X {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_inheritance_value_conversion_copy_return.carbon:[[@LINE+7]]:3: error: cannot copy value of type `A` [CopyOfUncopyableType]
  // CHECK:STDERR:   fn F() -> B;
  // CHECK:STDERR:   ^~~~~~~~~~~~
  // CHECK:STDERR: fail_inheritance_value_conversion_copy_return.carbon:[[@LINE-8]]:3: note: while building thunk to match the signature of this function [ThunkSignature]
  // CHECK:STDERR:   fn F() -> Self;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn F() -> B;
  //@dump-sem-ir-end
}

// --- fail_param_type_mismatch.carbon

library "[[@TEST_NAME]]";

interface I {
  // CHECK:STDERR: fail_param_type_mismatch.carbon:[[@LINE+3]]:8: error: `Core.ImplicitAs` implicitly referenced here, but package `Core` not found [CoreNotFound]
  // CHECK:STDERR:   fn F(a: Self);
  // CHECK:STDERR:        ^~~~~~~
  fn F(a: Self);
}

class A {}
class B {}

impl A as I {
  // CHECK:STDERR: fail_param_type_mismatch.carbon:[[@LINE+7]]:8: note: initializing function parameter [InCallToFunctionParam]
  // CHECK:STDERR:   fn F(a: B);
  // CHECK:STDERR:        ^~~~
  // CHECK:STDERR: fail_param_type_mismatch.carbon:[[@LINE-10]]:3: note: while building thunk to match the signature of this function [ThunkSignature]
  // CHECK:STDERR:   fn F(a: Self);
  // CHECK:STDERR:   ^~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn F(a: B);
}

// --- fail_return_mismatch.carbon

library "[[@TEST_NAME]]";

interface I {
  fn F() -> Self;
}

class A {}
class B {}

impl A as I {
  // CHECK:STDERR: fail_return_mismatch.carbon:[[@LINE+7]]:3: error: `Core.ImplicitAs` implicitly referenced here, but package `Core` not found [CoreNotFound]
  // CHECK:STDERR:   fn F() -> B;
  // CHECK:STDERR:   ^~~~~~~~~~~~
  // CHECK:STDERR: fail_return_mismatch.carbon:[[@LINE-10]]:3: note: while building thunk to match the signature of this function [ThunkSignature]
  // CHECK:STDERR:   fn F() -> Self;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn F() -> B;
}

// --- return_empty_tuple_mismatch_allowed.carbon

library "[[@TEST_NAME]]";

interface I {
  fn HasReturn() -> Self;
  fn NoReturn();
  fn EmptyTupleReturn() -> ();
}

impl () as I {
  // OK, can `return HasReturn();` in thunk.
  fn HasReturn();

  // OK, exact match.
  fn NoReturn();

  // OK, same as `HasReturn`.
  fn EmptyTupleReturn();
}

// --- fail_return_empty_tuple_mismatch.carbon

library "[[@TEST_NAME]]";

interface I {
  fn NoReturn();
}

impl () as I {
  // TODO: The proposal says to reject this. But should we really do so?
  // CHECK:STDERR: fail_return_empty_tuple_mismatch.carbon:[[@LINE+7]]:3: error: function redeclaration differs because return type is `()` [FunctionRedeclReturnTypeDiffers]
  // CHECK:STDERR:   fn NoReturn() -> ();
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~~~
  // CHECK:STDERR: fail_return_empty_tuple_mismatch.carbon:[[@LINE-8]]:3: note: previously declared with no return type [FunctionRedeclReturnTypePreviousNoReturn]
  // CHECK:STDERR:   fn NoReturn();
  // CHECK:STDERR:   ^~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn NoReturn() -> ();
}

class C {}

impl C as I {
  // CHECK:STDERR: fail_return_empty_tuple_mismatch.carbon:[[@LINE+7]]:3: error: function redeclaration differs because return type is `C` [FunctionRedeclReturnTypeDiffers]
  // CHECK:STDERR:   fn NoReturn() -> C;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~~
  // CHECK:STDERR: fail_return_empty_tuple_mismatch.carbon:[[@LINE-21]]:3: note: previously declared with no return type [FunctionRedeclReturnTypePreviousNoReturn]
  // CHECK:STDERR:   fn NoReturn();
  // CHECK:STDERR:   ^~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn NoReturn() -> C;
}

// --- fail_param_type_incomplete.carbon

library "[[@TEST_NAME]]";

interface I(T:! type) {
  // CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE+3]]:8: error: parameter has incomplete type `B` in function definition [IncompleteTypeInFunctionParam]
  // CHECK:STDERR:   fn F(a: T);
  // CHECK:STDERR:        ^~~~
  fn F(a: T);
}

// CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE+3]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
// CHECK:STDERR: class B;
// CHECK:STDERR: ^~~~~~~~
class B;

class C {
  impl as I(B) {
    // CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE+14]]:5: note: while building thunk calling this function [ThunkCallee]
    // CHECK:STDERR:     fn F(c: C);
    // CHECK:STDERR:     ^~~~~~~~~~~
    // CHECK:STDERR:
    // CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE-14]]:8: error: `Core.ImplicitAs` implicitly referenced here, but package `Core` not found [CoreNotFound]
    // CHECK:STDERR:   fn F(a: T);
    // CHECK:STDERR:        ^~~~
    // CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE+7]]:10: note: initializing function parameter [InCallToFunctionParam]
    // CHECK:STDERR:     fn F(c: C);
    // CHECK:STDERR:          ^~~~
    // CHECK:STDERR: fail_param_type_incomplete.carbon:[[@LINE-20]]:3: note: while building thunk to match the signature of this function [ThunkSignature]
    // CHECK:STDERR:   fn F(a: T);
    // CHECK:STDERR:   ^~~~~~~~~~~
    // CHECK:STDERR:
    fn F(c: C);
  }
}

// --- generic_function.carbon

library "[[@TEST_NAME]]";

interface I {
  fn F[T:! type](x: T*) -> T*;
}

impl () as I {
  //@dump-sem-ir-begin
  fn F[U:! type](x: U) -> U { return x; }
  //@dump-sem-ir-end
}

// --- fail_todo_generic_method.carbon

library "[[@TEST_NAME]]";

interface I {
  fn F[self: Self, T:! type](x: T*) -> T*;
}

// TODO: This fails because `x.(y)`, where `y` is a generic method, fails with
// an "expression cannot be used as a value" error.
impl () as I {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_generic_method.carbon:[[@LINE+7]]:3: error: expression cannot be used as a value [UseOfNonExprAsValue]
  // CHECK:STDERR:   fn F[self: (), U:! type](x: U) -> U { return x; }
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  // CHECK:STDERR: fail_todo_generic_method.carbon:[[@LINE-10]]:3: note: while building thunk to match the signature of this function [ThunkSignature]
  // CHECK:STDERR:   fn F[self: Self, T:! type](x: T*) -> T*;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  fn F[self: (), U:! type](x: U) -> U { return x; }
  //@dump-sem-ir-end
}

// --- generic_interface.carbon

library "[[@TEST_NAME]]";

interface I(T:! type) {
  fn F() -> {.a: T, .b: T};
}

impl () as I({}) {
  //@dump-sem-ir-begin
  fn F() -> {.b: {}, .a: {}};
  //@dump-sem-ir-end
}

// CHECK:STDOUT: --- struct_conversion.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %struct_type.a.b.391: type = struct_type {.a: %empty_tuple.type, .b: %empty_struct_type} [concrete]
// CHECK:STDOUT:   %struct_type.c.d.15a: type = struct_type {.c: %empty_tuple.type, .d: %empty_struct_type} [concrete]
// CHECK:STDOUT:   %struct_type.b.a.40c: type = struct_type {.b: %empty_struct_type, .a: %empty_tuple.type} [concrete]
// CHECK:STDOUT:   %pattern_type.231: type = pattern_type %struct_type.b.a.40c [concrete]
// CHECK:STDOUT:   %struct_type.d.c.b36: type = struct_type {.d: %empty_struct_type, .c: %empty_tuple.type} [concrete]
// CHECK:STDOUT:   %pattern_type.844: type = pattern_type %struct_type.d.c.b36 [concrete]
// CHECK:STDOUT:   %F.type.39e918.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.c04b92.1: %F.type.39e918.1 = struct_value () [concrete]
// CHECK:STDOUT:   %F.type.39e918.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.c04b92.2: %F.type.39e918.2 = struct_value () [concrete]
// CHECK:STDOUT:   %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT:   %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT:   %struct: %struct_type.c.d.15a = struct_value (%empty_tuple, %empty_struct) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %.loc8_7.2 as %I.ref {
// CHECK:STDOUT:   %F.decl.loc10_48.1: %F.type.39e918.1 = fn_decl @F.2 [concrete = constants.%F.c04b92.1] {
// CHECK:STDOUT:     %y.patt: %pattern_type.231 = binding_pattern y [concrete]
// CHECK:STDOUT:     %y.param_patt: %pattern_type.231 = value_param_pattern %y.patt, call_param0 [concrete]
// CHECK:STDOUT:     %return.patt: %pattern_type.844 = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.844 = out_param_pattern %return.patt, call_param1 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %.loc10_38.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:     %.loc10_38.2: type = converted %.loc10_38.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:     %.loc10_46.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:     %.loc10_46.2: type = converted %.loc10_46.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT:     %struct_type.d.c: type = struct_type {.d: %empty_struct_type, .c: %empty_tuple.type} [concrete = constants.%struct_type.d.c.b36]
// CHECK:STDOUT:     %y.param: %struct_type.b.a.40c = value_param call_param0
// CHECK:STDOUT:     %.loc10_26: type = splice_block %struct_type.b.a [concrete = constants.%struct_type.b.a.40c] {
// CHECK:STDOUT:       %.loc10_17.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:       %.loc10_17.2: type = converted %.loc10_17.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:       %.loc10_25.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:       %.loc10_25.2: type = converted %.loc10_25.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT:       %struct_type.b.a: type = struct_type {.b: %empty_struct_type, .a: %empty_tuple.type} [concrete = constants.%struct_type.b.a.40c]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %y: %struct_type.b.a.40c = bind_name y, %y.param
// CHECK:STDOUT:     %return.param: ref %struct_type.d.c.b36 = out_param call_param1
// CHECK:STDOUT:     %return: ref %struct_type.d.c.b36 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc10_48.2: %F.type.39e918.2 = fn_decl @F.3 [concrete = constants.%F.c04b92.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl.loc10_48.1
// CHECK:STDOUT:   witness = file.%I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2(%y.param: %struct_type.b.a.40c) -> %return.param: %struct_type.d.c.b36;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3(%x.param: %struct_type.a.b.391) -> %return.param: %struct_type.c.d.15a {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.39e918.1 = name_ref F, @impl.%F.decl.loc10_48.1 [concrete = constants.%F.c04b92.1]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %.loc10_48.1: ref %struct_type.d.c.b36 = temporary_storage
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.call: init %struct_type.d.c.b36 = call %F.ref(%.loc5_9.3) to %.loc10_48.1
// CHECK:STDOUT:   %.loc10_48.2: ref %struct_type.d.c.b36 = temporary %.loc10_48.1, %F.call
// CHECK:STDOUT:   %.loc10_48.3: ref %empty_tuple.type = struct_access %.loc10_48.2, element1
// CHECK:STDOUT:   %.loc10_48.4: ref %empty_tuple.type = struct_access %return, element1
// CHECK:STDOUT:   %.loc10_48.5: init %empty_tuple.type = tuple_init () to %.loc10_48.4 [concrete = constants.%empty_tuple]
// CHECK:STDOUT:   %.loc10_48.6: init %empty_tuple.type = converted %.loc10_48.3, %.loc10_48.5 [concrete = constants.%empty_tuple]
// CHECK:STDOUT:   %.loc10_48.7: ref %empty_struct_type = struct_access %.loc10_48.2, element0
// CHECK:STDOUT:   %.loc10_48.8: ref %empty_struct_type = struct_access %return, element0
// CHECK:STDOUT:   %.loc10_48.9: init %empty_struct_type = struct_init () to %.loc10_48.8 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_48.10: init %empty_struct_type = converted %.loc10_48.7, %.loc10_48.9 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_48.11: init %struct_type.c.d.15a = struct_init (%.loc10_48.6, %.loc10_48.10) to %return [concrete = constants.%struct]
// CHECK:STDOUT:   %.loc10_48.12: init %struct_type.c.d.15a = converted %F.call, %.loc10_48.11 [concrete = constants.%struct]
// CHECK:STDOUT:   return %.loc10_48.12 to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- inheritance_conversion.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A: type = class_type @A [concrete]
// CHECK:STDOUT:   %B: type = class_type @B [concrete]
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %pattern_type.f6d: type = pattern_type auto [concrete]
// CHECK:STDOUT:   %ptr.6db: type = ptr_type %A [concrete]
// CHECK:STDOUT:   %pattern_type.5f8: type = pattern_type %ptr.6db [concrete]
// CHECK:STDOUT:   %ptr.019: type = ptr_type %C [concrete]
// CHECK:STDOUT:   %pattern_type.44a: type = pattern_type %ptr.019 [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.5161e9.1: %F.type.f1b0b1.1 = struct_value () [concrete]
// CHECK:STDOUT:   %ptr.e79: type = ptr_type %B [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.5161e9.2: %F.type.f1b0b1.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %B.ref as %X.ref {
// CHECK:STDOUT:   %F.decl.loc14_39.1: %F.type.f1b0b1.1 = fn_decl @F.2 [concrete = constants.%F.5161e9.1] {
// CHECK:STDOUT:     %self.patt: %pattern_type.5f8 = binding_pattern self [concrete]
// CHECK:STDOUT:     %self.param_patt: %pattern_type.5f8 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT:     %.loc14_8: %pattern_type.f6d = addr_pattern %self.param_patt [concrete]
// CHECK:STDOUT:     %other.patt: %pattern_type.5f8 = binding_pattern other [concrete]
// CHECK:STDOUT:     %other.param_patt: %pattern_type.5f8 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT:     %return.patt: %pattern_type.44a = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.44a = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %ptr.loc14_38: type = ptr_type %C.ref [concrete = constants.%ptr.019]
// CHECK:STDOUT:     %self.param: %ptr.6db = value_param call_param0
// CHECK:STDOUT:     %.loc14_20: type = splice_block %ptr.loc14_20 [concrete = constants.%ptr.6db] {
// CHECK:STDOUT:       %A.ref.loc14_19: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:       %ptr.loc14_20: type = ptr_type %A.ref.loc14_19 [concrete = constants.%ptr.6db]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %self: %ptr.6db = bind_name self, %self.param
// CHECK:STDOUT:     %other.param: %ptr.6db = value_param call_param1
// CHECK:STDOUT:     %.loc14_31: type = splice_block %ptr.loc14_31 [concrete = constants.%ptr.6db] {
// CHECK:STDOUT:       %A.ref.loc14_30: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:       %ptr.loc14_31: type = ptr_type %A.ref.loc14_30 [concrete = constants.%ptr.6db]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %other: %ptr.6db = bind_name other, %other.param
// CHECK:STDOUT:     %return.param: ref %ptr.019 = out_param call_param2
// CHECK:STDOUT:     %return: ref %ptr.019 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc14_39.2: %F.type.f1b0b1.2 = fn_decl @F.3 [concrete = constants.%F.5161e9.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .A = <poisoned>
// CHECK:STDOUT:   .C = <poisoned>
// CHECK:STDOUT:   .F = %F.decl.loc14_39.1
// CHECK:STDOUT:   witness = file.%X.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2(%self.param: %ptr.6db, %other.param: %ptr.6db) -> %ptr.019;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3(%self.param: %ptr.e79, %other.param: %ptr.e79) -> %ptr.e79 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.f1b0b1.1 = name_ref F, @impl.%F.decl.loc14_39.1 [concrete = constants.%F.5161e9.1]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.bound: <bound method> = bound_method %.loc9_17.1, %F.ref
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.call: init %ptr.019 = call %F.bound(%.loc9_17.4, %.loc9_31.3)
// CHECK:STDOUT:   %.loc14_39.1: %ptr.019 = value_of_initializer %F.call
// CHECK:STDOUT:   %.loc14_39.2: %ptr.019 = converted %F.call, %.loc14_39.1
// CHECK:STDOUT:   %.loc14_39.3: ref %C = deref %.loc14_39.2
// CHECK:STDOUT:   %.loc14_39.4: ref %B = class_element_access %.loc14_39.3, element0
// CHECK:STDOUT:   %addr.loc14: %ptr.e79 = addr_of %.loc14_39.4
// CHECK:STDOUT:   %.loc14_39.5: %ptr.e79 = converted %F.call, %addr.loc14
// CHECK:STDOUT:   return %.loc14_39.5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- inheritance_value_conversion.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A: type = class_type @A [concrete]
// CHECK:STDOUT:   %B: type = class_type @B [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %pattern_type.c10: type = pattern_type %A [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.5161e9.1: %F.type.f1b0b1.1 = struct_value () [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.5161e9.2: %F.type.f1b0b1.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %B.ref as %X.ref {
// CHECK:STDOUT:   %F.decl.loc13_26.1: %F.type.f1b0b1.1 = fn_decl @F.2 [concrete = constants.%F.5161e9.1] {
// CHECK:STDOUT:     %self.patt: %pattern_type.c10 = binding_pattern self [concrete]
// CHECK:STDOUT:     %self.param_patt: %pattern_type.c10 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT:     %other.patt: %pattern_type.c10 = binding_pattern other [concrete]
// CHECK:STDOUT:     %other.param_patt: %pattern_type.c10 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %self.param: %A = value_param call_param0
// CHECK:STDOUT:     %A.ref.loc13_14: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:     %self: %A = bind_name self, %self.param
// CHECK:STDOUT:     %other.param: %A = value_param call_param1
// CHECK:STDOUT:     %A.ref.loc13_24: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:     %other: %A = bind_name other, %other.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc13_26.2: %F.type.f1b0b1.2 = fn_decl @F.3 [concrete = constants.%F.5161e9.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .A = <poisoned>
// CHECK:STDOUT:   .F = %F.decl.loc13_26.1
// CHECK:STDOUT:   witness = file.%X.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2(%self.param: %A, %other.param: %A);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3(%self.param: %B, %other.param: %B) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.f1b0b1.1 = name_ref F, @impl.%F.decl.loc13_26.1 [concrete = constants.%F.5161e9.1]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.bound: <bound method> = bound_method %self.ref, %F.ref
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.call: init %empty_tuple.type = call %F.bound(%.loc8_12.3, %.loc8_25.3)
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- inheritance_value_conversion_pointer.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A: type = class_type @A [concrete]
// CHECK:STDOUT:   %B: type = class_type @B [concrete]
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %pattern_type.f6d: type = pattern_type auto [concrete]
// CHECK:STDOUT:   %ptr.6db: type = ptr_type %A [concrete]
// CHECK:STDOUT:   %pattern_type.5f8: type = pattern_type %ptr.6db [concrete]
// CHECK:STDOUT:   %ptr.019: type = ptr_type %C [concrete]
// CHECK:STDOUT:   %pattern_type.44a: type = pattern_type %ptr.019 [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.5161e9.1: %F.type.f1b0b1.1 = struct_value () [concrete]
// CHECK:STDOUT:   %ptr.e79: type = ptr_type %B [concrete]
// CHECK:STDOUT:   %F.type.f1b0b1.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.5161e9.2: %F.type.f1b0b1.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %B.ref as %X.ref {
// CHECK:STDOUT:   %F.decl.loc14_39.1: %F.type.f1b0b1.1 = fn_decl @F.2 [concrete = constants.%F.5161e9.1] {
// CHECK:STDOUT:     %self.patt: %pattern_type.5f8 = binding_pattern self [concrete]
// CHECK:STDOUT:     %self.param_patt: %pattern_type.5f8 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT:     %.loc14_8: %pattern_type.f6d = addr_pattern %self.param_patt [concrete]
// CHECK:STDOUT:     %other.patt: %pattern_type.5f8 = binding_pattern other [concrete]
// CHECK:STDOUT:     %other.param_patt: %pattern_type.5f8 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT:     %return.patt: %pattern_type.44a = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.44a = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %ptr.loc14_38: type = ptr_type %C.ref [concrete = constants.%ptr.019]
// CHECK:STDOUT:     %self.param: %ptr.6db = value_param call_param0
// CHECK:STDOUT:     %.loc14_20: type = splice_block %ptr.loc14_20 [concrete = constants.%ptr.6db] {
// CHECK:STDOUT:       %A.ref.loc14_19: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:       %ptr.loc14_20: type = ptr_type %A.ref.loc14_19 [concrete = constants.%ptr.6db]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %self: %ptr.6db = bind_name self, %self.param
// CHECK:STDOUT:     %other.param: %ptr.6db = value_param call_param1
// CHECK:STDOUT:     %.loc14_31: type = splice_block %ptr.loc14_31 [concrete = constants.%ptr.6db] {
// CHECK:STDOUT:       %A.ref.loc14_30: type = name_ref A, file.%A.decl [concrete = constants.%A]
// CHECK:STDOUT:       %ptr.loc14_31: type = ptr_type %A.ref.loc14_30 [concrete = constants.%ptr.6db]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %other: %ptr.6db = bind_name other, %other.param
// CHECK:STDOUT:     %return.param: ref %ptr.019 = out_param call_param2
// CHECK:STDOUT:     %return: ref %ptr.019 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc14_39.2: %F.type.f1b0b1.2 = fn_decl @F.3 [concrete = constants.%F.5161e9.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .A = <poisoned>
// CHECK:STDOUT:   .C = <poisoned>
// CHECK:STDOUT:   .F = %F.decl.loc14_39.1
// CHECK:STDOUT:   witness = file.%X.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2(%self.param: %ptr.6db, %other.param: %ptr.6db) -> %ptr.019;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3(%self.param: %ptr.e79, %other.param: %ptr.e79) -> %ptr.e79 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.f1b0b1.1 = name_ref F, @impl.%F.decl.loc14_39.1 [concrete = constants.%F.5161e9.1]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.bound: <bound method> = bound_method %.loc9_17.1, %F.ref
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:   %F.call: init %ptr.019 = call %F.bound(%.loc9_17.4, %.loc9_31.3)
// CHECK:STDOUT:   %.loc14_39.1: %ptr.019 = value_of_initializer %F.call
// CHECK:STDOUT:   %.loc14_39.2: %ptr.019 = converted %F.call, %.loc14_39.1
// CHECK:STDOUT:   %.loc14_39.3: ref %C = deref %.loc14_39.2
// CHECK:STDOUT:   %.loc14_39.4: ref %B = class_element_access %.loc14_39.3, element0
// CHECK:STDOUT:   %addr.loc14: %ptr.e79 = addr_of %.loc14_39.4
// CHECK:STDOUT:   %.loc14_39.5: %ptr.e79 = converted %F.call, %addr.loc14
// CHECK:STDOUT:   return %.loc14_39.5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_inheritance_value_conversion_copy_return.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A: type = class_type @A [concrete]
// CHECK:STDOUT:   %B: type = class_type @B [concrete]
// CHECK:STDOUT:   %pattern_type.049: type = pattern_type %B [concrete]
// CHECK:STDOUT:   %F.type.b24d6f.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.77e9d5.1: %F.type.b24d6f.1 = struct_value () [concrete]
// CHECK:STDOUT:   %F.type.b24d6f.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.77e9d5.2: %F.type.b24d6f.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %A.ref as %X.ref {
// CHECK:STDOUT:   %F.decl.loc20_14.1: %F.type.b24d6f.1 = fn_decl @F.2 [concrete = constants.%F.77e9d5.1] {
// CHECK:STDOUT:     %return.patt: %pattern_type.049 = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.049 = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %B.ref: type = name_ref B, file.%B.decl [concrete = constants.%B]
// CHECK:STDOUT:     %return.param: ref %B = out_param call_param0
// CHECK:STDOUT:     %return: ref %B = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc20_14.2: %F.type.b24d6f.2 = fn_decl @F.3 [concrete = constants.%F.77e9d5.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .B = <poisoned>
// CHECK:STDOUT:   .F = %F.decl.loc20_14.1
// CHECK:STDOUT:   witness = file.%X.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2() -> %return.param: %B;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3() -> %return.param: %A {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.b24d6f.1 = name_ref F, @impl.%F.decl.loc20_14.1 [concrete = constants.%F.77e9d5.1]
// CHECK:STDOUT:   %.loc20_14.1: ref %B = temporary_storage
// CHECK:STDOUT:   %F.call: init %B = call %F.ref() to %.loc20_14.1
// CHECK:STDOUT:   %.loc20_14.2: ref %B = temporary %.loc20_14.1, %F.call
// CHECK:STDOUT:   %.loc20_14.3: ref %A = class_element_access %.loc20_14.2, element0
// CHECK:STDOUT:   %.loc20_14.4: ref %A = converted %F.call, %.loc20_14.3
// CHECK:STDOUT:   %.loc20_14.5: %A = bind_value %.loc20_14.4
// CHECK:STDOUT:   return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- generic_function.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %pattern_type.98f: type = pattern_type type [concrete]
// CHECK:STDOUT:   %U: type = bind_symbolic_name U, 0 [symbolic]
// CHECK:STDOUT:   %pattern_type.7dc: type = pattern_type %U [symbolic]
// CHECK:STDOUT:   %F.type.39e918.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.c04b92.1: %F.type.39e918.1 = struct_value () [concrete]
// CHECK:STDOUT:   %T.8b3: type = bind_symbolic_name T, 0 [symbolic]
// CHECK:STDOUT:   %ptr.79f: type = ptr_type %T.8b3 [symbolic]
// CHECK:STDOUT:   %pattern_type.afe: type = pattern_type %ptr.79f [symbolic]
// CHECK:STDOUT:   %F.type.39e918.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.c04b92.2: %F.type.39e918.2 = struct_value () [concrete]
// CHECK:STDOUT:   %require_complete.4ae: <witness> = require_complete_type %U [symbolic]
// CHECK:STDOUT:   %require_complete.6e5: <witness> = require_complete_type %ptr.79f [symbolic]
// CHECK:STDOUT:   %F.specific_fn: <specific function> = specific_function %F.c04b92.1, @F.2(%ptr.79f) [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %.loc8_7.2 as %I.ref {
// CHECK:STDOUT:   %F.decl.loc10_29.1: %F.type.39e918.1 = fn_decl @F.2 [concrete = constants.%F.c04b92.1] {
// CHECK:STDOUT:     %U.patt: %pattern_type.98f = symbolic_binding_pattern U, 0 [concrete]
// CHECK:STDOUT:     %x.patt: @F.2.%pattern_type (%pattern_type.7dc) = binding_pattern x [concrete]
// CHECK:STDOUT:     %x.param_patt: @F.2.%pattern_type (%pattern_type.7dc) = value_param_pattern %x.patt, call_param0 [concrete]
// CHECK:STDOUT:     %return.patt: @F.2.%pattern_type (%pattern_type.7dc) = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: @F.2.%pattern_type (%pattern_type.7dc) = out_param_pattern %return.patt, call_param1 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %U.ref.loc10_27: type = name_ref U, %U.loc10_8.2 [symbolic = %U.loc10_8.1 (constants.%U)]
// CHECK:STDOUT:     %U.loc10_8.2: type = bind_symbolic_name U, 0 [symbolic = %U.loc10_8.1 (constants.%U)]
// CHECK:STDOUT:     %x.param: @F.2.%U.loc10_8.1 (%U) = value_param call_param0
// CHECK:STDOUT:     %U.ref.loc10_21: type = name_ref U, %U.loc10_8.2 [symbolic = %U.loc10_8.1 (constants.%U)]
// CHECK:STDOUT:     %x: @F.2.%U.loc10_8.1 (%U) = bind_name x, %x.param
// CHECK:STDOUT:     %return.param: ref @F.2.%U.loc10_8.1 (%U) = out_param call_param1
// CHECK:STDOUT:     %return: ref @F.2.%U.loc10_8.1 (%U) = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc10_29.2: %F.type.39e918.2 = fn_decl @F.3 [concrete = constants.%F.c04b92.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl.loc10_29.1
// CHECK:STDOUT:   witness = file.%I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.2(%U.loc10_8.2: type) {
// CHECK:STDOUT:   %U.loc10_8.1: type = bind_symbolic_name U, 0 [symbolic = %U.loc10_8.1 (constants.%U)]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %U.loc10_8.1 [symbolic = %pattern_type (constants.%pattern_type.7dc)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:   %require_complete: <witness> = require_complete_type %U.loc10_8.1 [symbolic = %require_complete (constants.%require_complete.4ae)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%x.param: @F.2.%U.loc10_8.1 (%U)) -> @F.2.%U.loc10_8.1 (%U) {
// CHECK:STDOUT:   !entry:
// CHECK:STDOUT:     %x.ref: @F.2.%U.loc10_8.1 (%U) = name_ref x, %x
// CHECK:STDOUT:     return %x.ref
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.3(%T.loc5_8.2: type) {
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:   %F.specific_fn.loc10_29.2: <specific function> = specific_function constants.%F.c04b92.1, @F.2(%ptr) [symbolic = %F.specific_fn.loc10_29.2 (constants.%F.specific_fn)]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%x.param: @F.3.%ptr (%ptr.79f)) -> @F.3.%ptr (%ptr.79f) {
// CHECK:STDOUT:   !entry:
// CHECK:STDOUT:     %F.ref: %F.type.39e918.1 = name_ref F, @impl.%F.decl.loc10_29.1 [concrete = constants.%F.c04b92.1]
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:     %F.specific_fn.loc10_29.1: <specific function> = specific_function %F.ref, @F.2(constants.%ptr.79f) [symbolic = %F.specific_fn.loc10_29.2 (constants.%F.specific_fn)]
// CHECK:STDOUT:     %F.call: init @F.3.%ptr (%ptr.79f) = call %F.specific_fn.loc10_29.1(%x.ref)
// CHECK:STDOUT:     %.loc10_29.1: @F.3.%ptr (%ptr.79f) = value_of_initializer %F.call
// CHECK:STDOUT:     %.loc10_29.2: @F.3.%ptr (%ptr.79f) = converted %F.call, %.loc10_29.1
// CHECK:STDOUT:     return %.loc10_29.2
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.2(constants.%U) {
// CHECK:STDOUT:   %U.loc10_8.1 => constants.%U
// CHECK:STDOUT:   %pattern_type => constants.%pattern_type.7dc
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.3(constants.%T.8b3) {
// CHECK:STDOUT:   %T.loc5_8.1 => constants.%T.8b3
// CHECK:STDOUT:   %ptr => constants.%ptr.79f
// CHECK:STDOUT:   %pattern_type => constants.%pattern_type.afe
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.2(constants.%ptr.79f) {
// CHECK:STDOUT:   %U.loc10_8.1 => constants.%ptr.79f
// CHECK:STDOUT:   %pattern_type => constants.%pattern_type.afe
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:   %require_complete => constants.%require_complete.6e5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_generic_method.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %pattern_type.98f: type = pattern_type type [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %pattern_type.cb1: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT:   %U: type = bind_symbolic_name U, 0 [symbolic]
// CHECK:STDOUT:   %pattern_type.7dc: type = pattern_type %U [symbolic]
// CHECK:STDOUT:   %F.type.39e918.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.c04b92.1: %F.type.39e918.1 = struct_value () [concrete]
// CHECK:STDOUT:   %T.8b3: type = bind_symbolic_name T, 0 [symbolic]
// CHECK:STDOUT:   %ptr.79f: type = ptr_type %T.8b3 [symbolic]
// CHECK:STDOUT:   %pattern_type.afe: type = pattern_type %ptr.79f [symbolic]
// CHECK:STDOUT:   %F.type.39e918.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.c04b92.2: %F.type.39e918.2 = struct_value () [concrete]
// CHECK:STDOUT:   %require_complete.4ae: <witness> = require_complete_type %U [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %.loc10_7.2 as %I.ref {
// CHECK:STDOUT:   %F.decl.loc19_39.1: %F.type.39e918.1 = fn_decl @F.2 [concrete = constants.%F.c04b92.1] {
// CHECK:STDOUT:     %self.patt: %pattern_type.cb1 = binding_pattern self [concrete]
// CHECK:STDOUT:     %self.param_patt: %pattern_type.cb1 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT:     %U.patt: %pattern_type.98f = symbolic_binding_pattern U, 0 [concrete]
// CHECK:STDOUT:     %x.patt: @F.2.%pattern_type (%pattern_type.7dc) = binding_pattern x [concrete]
// CHECK:STDOUT:     %x.param_patt: @F.2.%pattern_type (%pattern_type.7dc) = value_param_pattern %x.patt, call_param1 [concrete]
// CHECK:STDOUT:     %return.patt: @F.2.%pattern_type (%pattern_type.7dc) = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: @F.2.%pattern_type (%pattern_type.7dc) = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %U.ref.loc19_37: type = name_ref U, %U.loc19_18.2 [symbolic = %U.loc19_18.1 (constants.%U)]
// CHECK:STDOUT:     %self.param: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT:     %.loc19_15.1: type = splice_block %.loc19_15.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT:       %.loc19_15.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:       %.loc19_15.3: type = converted %.loc19_15.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %self: %empty_tuple.type = bind_name self, %self.param
// CHECK:STDOUT:     %U.loc19_18.2: type = bind_symbolic_name U, 0 [symbolic = %U.loc19_18.1 (constants.%U)]
// CHECK:STDOUT:     %x.param: @F.2.%U.loc19_18.1 (%U) = value_param call_param1
// CHECK:STDOUT:     %U.ref.loc19_31: type = name_ref U, %U.loc19_18.2 [symbolic = %U.loc19_18.1 (constants.%U)]
// CHECK:STDOUT:     %x: @F.2.%U.loc19_18.1 (%U) = bind_name x, %x.param
// CHECK:STDOUT:     %return.param: ref @F.2.%U.loc19_18.1 (%U) = out_param call_param2
// CHECK:STDOUT:     %return: ref @F.2.%U.loc19_18.1 (%U) = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc19_39.2: %F.type.39e918.2 = fn_decl @F.3 [concrete = constants.%F.c04b92.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl.loc19_39.1
// CHECK:STDOUT:   witness = file.%I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.2(%U.loc19_18.2: type) {
// CHECK:STDOUT:   %U.loc19_18.1: type = bind_symbolic_name U, 0 [symbolic = %U.loc19_18.1 (constants.%U)]
// CHECK:STDOUT:   %pattern_type: type = pattern_type %U.loc19_18.1 [symbolic = %pattern_type (constants.%pattern_type.7dc)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:   %require_complete: <witness> = require_complete_type %U.loc19_18.1 [symbolic = %require_complete (constants.%require_complete.4ae)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%self.param: %empty_tuple.type, %x.param: @F.2.%U.loc19_18.1 (%U)) -> @F.2.%U.loc19_18.1 (%U) {
// CHECK:STDOUT:   !entry:
// CHECK:STDOUT:     %x.ref: @F.2.%U.loc19_18.1 (%U) = name_ref x, %x
// CHECK:STDOUT:     return %x.ref
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.3(%T.loc5_20.2: type) {
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%self.param: %empty_tuple.type, %x.param: @F.3.%ptr (%ptr.79f)) -> @F.3.%ptr (%ptr.79f) {
// CHECK:STDOUT:   !entry:
// CHECK:STDOUT:     %F.ref: %F.type.39e918.1 = name_ref F, @impl.%F.decl.loc19_39.1 [concrete = constants.%F.c04b92.1]
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:     return <error>
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.2(constants.%U) {
// CHECK:STDOUT:   %U.loc19_18.1 => constants.%U
// CHECK:STDOUT:   %pattern_type => constants.%pattern_type.7dc
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.3(constants.%T.8b3) {
// CHECK:STDOUT:   %T.loc5_20.1 => constants.%T.8b3
// CHECK:STDOUT:   %ptr => constants.%ptr.79f
// CHECK:STDOUT:   %pattern_type => constants.%pattern_type.afe
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- generic_interface.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %struct_type.b.a.1b0: type = struct_type {.b: %empty_struct_type, .a: %empty_struct_type} [concrete]
// CHECK:STDOUT:   %pattern_type.914: type = pattern_type %struct_type.b.a.1b0 [concrete]
// CHECK:STDOUT:   %F.type.29ab63.1: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.975709.1: %F.type.29ab63.1 = struct_value () [concrete]
// CHECK:STDOUT:   %struct_type.a.b.f95: type = struct_type {.a: %empty_struct_type, .b: %empty_struct_type} [concrete]
// CHECK:STDOUT:   %F.type.29ab63.2: type = fn_type @F.3 [concrete]
// CHECK:STDOUT:   %F.975709.2: %F.type.29ab63.2 = struct_value () [concrete]
// CHECK:STDOUT:   %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT:   %struct: %struct_type.a.b.f95 = struct_value (%empty_struct, %empty_struct) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %.loc8_7.2 as %I.type {
// CHECK:STDOUT:   %F.decl.loc10_29.1: %F.type.29ab63.1 = fn_decl @F.2 [concrete = constants.%F.975709.1] {
// CHECK:STDOUT:     %return.patt: %pattern_type.914 = return_slot_pattern [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.914 = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %.loc10_19.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:     %.loc10_19.2: type = converted %.loc10_19.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:     %.loc10_27.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:     %.loc10_27.2: type = converted %.loc10_27.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT:     %struct_type.b.a: type = struct_type {.b: %empty_struct_type, .a: %empty_struct_type} [concrete = constants.%struct_type.b.a.1b0]
// CHECK:STDOUT:     %return.param: ref %struct_type.b.a.1b0 = out_param call_param0
// CHECK:STDOUT:     %return: ref %struct_type.b.a.1b0 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl.loc10_29.2: %F.type.29ab63.2 = fn_decl @F.3 [concrete = constants.%F.975709.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl.loc10_29.1
// CHECK:STDOUT:   witness = file.%I.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2() -> %return.param: %struct_type.b.a.1b0;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.3() -> %return.param: %struct_type.a.b.f95 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %F.ref: %F.type.29ab63.1 = name_ref F, @impl.%F.decl.loc10_29.1 [concrete = constants.%F.975709.1]
// CHECK:STDOUT:   %.loc10_29.1: ref %struct_type.b.a.1b0 = temporary_storage
// CHECK:STDOUT:   %F.call: init %struct_type.b.a.1b0 = call %F.ref() to %.loc10_29.1
// CHECK:STDOUT:   %.loc10_29.2: ref %struct_type.b.a.1b0 = temporary %.loc10_29.1, %F.call
// CHECK:STDOUT:   %.loc10_29.3: ref %empty_struct_type = struct_access %.loc10_29.2, element1
// CHECK:STDOUT:   %.loc10_29.4: ref %empty_struct_type = struct_access %return, element1
// CHECK:STDOUT:   %.loc10_29.5: init %empty_struct_type = struct_init () to %.loc10_29.4 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_29.6: init %empty_struct_type = converted %.loc10_29.3, %.loc10_29.5 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_29.7: ref %empty_struct_type = struct_access %.loc10_29.2, element0
// CHECK:STDOUT:   %.loc10_29.8: ref %empty_struct_type = struct_access %return, element0
// CHECK:STDOUT:   %.loc10_29.9: init %empty_struct_type = struct_init () to %.loc10_29.8 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_29.10: init %empty_struct_type = converted %.loc10_29.7, %.loc10_29.9 [concrete = constants.%empty_struct]
// CHECK:STDOUT:   %.loc10_29.11: init %struct_type.a.b.f95 = struct_init (%.loc10_29.6, %.loc10_29.10) to %return [concrete = constants.%struct]
// CHECK:STDOUT:   %.loc10_29.12: init %struct_type.a.b.f95 = converted %F.call, %.loc10_29.11 [concrete = constants.%struct]
// CHECK:STDOUT:   return %.loc10_29.12 to %return
// CHECK:STDOUT: }
// CHECK:STDOUT: