carbon-lang/toolchain/check/testdata/interop/cpp/function/full_semir.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/int.carbon
// 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/interop/cpp/function/full_semir.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/full_semir.carbon

// ============================================================================
// Function with short parameter
// ============================================================================

// --- short_param.h

auto foo(short a) -> void;

// --- import_short_param.carbon

library "[[@TEST_NAME]]";

import Cpp library "short_param.h";

fn F() {
  Cpp.foo(1 as i16);
}

// ============================================================================
// Function with int parameter
// ============================================================================

// --- int_param.h

auto foo(int a) -> void;

// --- import_int_param.carbon

library "[[@TEST_NAME]]";

import Cpp library "int_param.h";

fn F() {
  Cpp.foo(1);
}

// ============================================================================
// Function with short return value
// ============================================================================

// --- short_return.h

auto foo_short() -> short;

// --- import_short_return.carbon

library "[[@TEST_NAME]]";

import Cpp library "short_return.h";

fn F() {
  let x: i16 = Cpp.foo_short();
}

// CHECK:STDOUT: --- import_short_param.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.type: type = cpp_overload_set_type @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
// CHECK:STDOUT:   %As.type.771: type = facet_type <@As, @As(%i16)> [concrete]
// CHECK:STDOUT:   %As.Convert.type.be5: type = fn_type @As.Convert, @As(%i16) [concrete]
// CHECK:STDOUT:   %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.type.0fd: type = fn_type @Core.IntLiteral.as.As.impl.Convert, @Core.IntLiteral.as.As.impl(%To) [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.2b1: %Core.IntLiteral.as.As.impl.Convert.type.0fd = struct_value () [symbolic]
// CHECK:STDOUT:   %As.impl_witness.c72: <witness> = impl_witness imports.%As.impl_witness_table.251, @Core.IntLiteral.as.As.impl(%int_16) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.type.2f9: type = fn_type @Core.IntLiteral.as.As.impl.Convert, @Core.IntLiteral.as.As.impl(%int_16) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.228: %Core.IntLiteral.as.As.impl.Convert.type.2f9 = struct_value () [concrete]
// CHECK:STDOUT:   %As.facet: %As.type.771 = facet_value Core.IntLiteral, (%As.impl_witness.c72) [concrete]
// CHECK:STDOUT:   %.28a: type = fn_type_with_self_type %As.Convert.type.be5, %As.facet [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.bound: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.As.impl.Convert.228 [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.As.impl.Convert.228, @Core.IntLiteral.as.As.impl.Convert(%int_16) [concrete]
// CHECK:STDOUT:   %bound_method.872: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.As.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
// CHECK:STDOUT:   %ptr.251: type = ptr_type %i16 [concrete]
// CHECK:STDOUT:   %pattern_type.54c: type = pattern_type %ptr.251 [concrete]
// CHECK:STDOUT:   %foo__carbon_thunk.type: type = fn_type @foo__carbon_thunk [concrete]
// CHECK:STDOUT:   %foo__carbon_thunk: %foo__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT:   %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT:   %Copy.Op.type: type = fn_type @Copy.Op [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.type.24b: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.c95: %Int.as.Copy.impl.Op.type.24b = struct_value () [symbolic]
// CHECK:STDOUT:   %Copy.impl_witness.c8a: <witness> = impl_witness imports.%Copy.impl_witness_table.b6a, @Int.as.Copy.impl(%int_16) [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.type.e6e: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_16) [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.d07: %Int.as.Copy.impl.Op.type.e6e = struct_value () [concrete]
// CHECK:STDOUT:   %Copy.facet: %Copy.type = facet_value %i16, (%Copy.impl_witness.c8a) [concrete]
// CHECK:STDOUT:   %.ec2: type = fn_type_with_self_type %Copy.Op.type, %Copy.facet [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.bound: <bound method> = bound_method %int_1.f90, %Int.as.Copy.impl.Op.d07 [concrete]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.d07, @Int.as.Copy.impl.Op(%int_16) [concrete]
// CHECK:STDOUT:   %bound_method.948: <bound method> = bound_method %int_1.f90, %Int.as.Copy.impl.Op.specific_fn [concrete]
// CHECK:STDOUT:   %Destroy.type: type = facet_type <@Destroy> [concrete]
// CHECK:STDOUT:   %type_where: type = facet_type <type where .Self impls <CanDestroy>> [concrete]
// CHECK:STDOUT:   %facet_value: %type_where = facet_value %i16, () [concrete]
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.type.fbf: type = fn_type @DestroyT.binding.as_type.as.Destroy.impl.Op, @DestroyT.binding.as_type.as.Destroy.impl(%facet_value) [concrete]
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.003: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.fbf = struct_value () [concrete]
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn: <specific function> = specific_function %DestroyT.binding.as_type.as.Destroy.impl.Op.003, @DestroyT.binding.as_type.as.Destroy.impl.Op(%facet_value) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     .As = %Core.As
// CHECK:STDOUT:     .Copy = %Core.Copy
// CHECK:STDOUT:     .Destroy = %Core.Destroy
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = %foo.cpp_overload_set.value
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/parts/as, As, loaded [concrete = constants.%As.generic]
// CHECK:STDOUT:   %Core.import_ref.05d: @Core.IntLiteral.as.As.impl.%Core.IntLiteral.as.As.impl.Convert.type (%Core.IntLiteral.as.As.impl.Convert.type.0fd) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.As.impl.%Core.IntLiteral.as.As.impl.Convert (constants.%Core.IntLiteral.as.As.impl.Convert.2b1)]
// CHECK:STDOUT:   %As.impl_witness_table.251 = impl_witness_table (%Core.import_ref.05d), @Core.IntLiteral.as.As.impl [concrete]
// CHECK:STDOUT:   %foo__carbon_thunk.decl: %foo__carbon_thunk.type = fn_decl @foo__carbon_thunk [concrete = constants.%foo__carbon_thunk] {
// CHECK:STDOUT:     %a.patt: %pattern_type.54c = value_binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type.54c = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %ptr.251 = value_param call_param0
// CHECK:STDOUT:     %.1: type = splice_block constants.%ptr.251 [concrete = constants.%ptr.251] {
// CHECK:STDOUT:       %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
// CHECK:STDOUT:       %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %a: %ptr.251 = value_binding a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT:   %Core.import_ref.d12: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.24b) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.c95)]
// CHECK:STDOUT:   %Copy.impl_witness_table.b6a = impl_witness_table (%Core.import_ref.d12), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT:   %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:     .F = %F.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "short_param.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
// CHECK:STDOUT:   %impl.elem0.loc7_13.1: %.28a = impl_witness_access constants.%As.impl_witness.c72, element0 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.228]
// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0.loc7_13.1 [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.bound]
// CHECK:STDOUT:   %specific_fn.loc7_13.1: <specific function> = specific_function %impl.elem0.loc7_13.1, @Core.IntLiteral.as.As.impl.Convert(constants.%int_16) [concrete = constants.%Core.IntLiteral.as.As.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn.loc7_13.1 [concrete = constants.%bound_method.872]
// CHECK:STDOUT:   %Core.IntLiteral.as.As.impl.Convert.call: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %Core.IntLiteral.as.As.impl.Convert.call [concrete = constants.%int_1.f90]
// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
// CHECK:STDOUT:   %.loc7_13.3: ref %i16 = temporary_storage
// CHECK:STDOUT:   %impl.elem0.loc7_13.2: %.ec2 = impl_witness_access constants.%Copy.impl_witness.c8a, element0 [concrete = constants.%Int.as.Copy.impl.Op.d07]
// CHECK:STDOUT:   %bound_method.loc7_13.3: <bound method> = bound_method %.loc7_13.2, %impl.elem0.loc7_13.2 [concrete = constants.%Int.as.Copy.impl.Op.bound]
// CHECK:STDOUT:   %specific_fn.loc7_13.2: <specific function> = specific_function %impl.elem0.loc7_13.2, @Int.as.Copy.impl.Op(constants.%int_16) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT:   %bound_method.loc7_13.4: <bound method> = bound_method %.loc7_13.2, %specific_fn.loc7_13.2 [concrete = constants.%bound_method.948]
// CHECK:STDOUT:   %Int.as.Copy.impl.Op.call: init %i16 = call %bound_method.loc7_13.4(%.loc7_13.2) [concrete = constants.%int_1.f90]
// CHECK:STDOUT:   %.loc7_13.4: ref %i16 = temporary %.loc7_13.3, %Int.as.Copy.impl.Op.call
// CHECK:STDOUT:   %addr: %ptr.251 = addr_of %.loc7_13.4
// CHECK:STDOUT:   %foo__carbon_thunk.call: init %empty_tuple.type = call imports.%foo__carbon_thunk.decl(%addr)
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.bound: <bound method> = bound_method %.loc7_13.4, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.003
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn: <specific function> = specific_function constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.003, @DestroyT.binding.as_type.as.Destroy.impl.Op(constants.%facet_value) [concrete = constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn]
// CHECK:STDOUT:   %bound_method.loc7_13.5: <bound method> = bound_method %.loc7_13.4, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn
// CHECK:STDOUT:   %DestroyT.binding.as_type.as.Destroy.impl.Op.call: init %empty_tuple.type = call %bound_method.loc7_13.5(%.loc7_13.4)
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @foo(%a.param: %i16);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @foo__carbon_thunk(%a.param: %ptr.251);
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_int_param.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.type: type = cpp_overload_set_type @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %pattern_type.7ce: type = pattern_type %i32 [concrete]
// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.d14: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT:   %ImplicitAs.Convert.type.1b6: type = fn_type @ImplicitAs.Convert, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT:   %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.f51: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.2a1: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.f51 = struct_value () [symbolic]
// CHECK:STDOUT:   %ImplicitAs.impl_witness.bc9: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.132, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.51e: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.e9b: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.51e = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.d14 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.bc9) [concrete]
// CHECK:STDOUT:   %.322: type = fn_type_with_self_type %ImplicitAs.Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.e9b [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.e9b, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = %foo.cpp_overload_set.value
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {
// CHECK:STDOUT:     %a.patt: %pattern_type.7ce = value_binding_pattern a [concrete]
// CHECK:STDOUT:     %a.param_patt: %pattern_type.7ce = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %a.param: %i32 = value_param call_param0
// CHECK:STDOUT:     %.1: type = splice_block %i32 [concrete = constants.%i32] {
// CHECK:STDOUT:       %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %a: %i32 = value_binding a, %a.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/parts/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
// CHECK:STDOUT:   %Core.import_ref.e24: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.f51) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.2a1)]
// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.132 = impl_witness_table (%Core.import_ref.e24), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:     .F = %F.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "int_param.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:   %impl.elem0: %.322 = impl_witness_access constants.%ImplicitAs.impl_witness.bc9, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.e9b]
// CHECK:STDOUT:   %bound_method.loc7_11.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc7_11.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call: init %i32 = call %bound_method.loc7_11.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc7_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc7_11.2: %i32 = converted %int_1, %.loc7_11.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call imports.%foo.decl(%.loc7_11.2)
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @foo(%a.param: %i32);
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_short_return.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
// CHECK:STDOUT:   %foo_short.cpp_overload_set.type: type = cpp_overload_set_type @foo_short.cpp_overload_set [concrete]
// CHECK:STDOUT:   %foo_short.cpp_overload_set.value: %foo_short.cpp_overload_set.type = cpp_overload_set_value @foo_short.cpp_overload_set [concrete]
// CHECK:STDOUT:   %ptr: type = ptr_type %i16 [concrete]
// CHECK:STDOUT:   %pattern_type.54c: type = pattern_type %ptr [concrete]
// CHECK:STDOUT:   %foo_short__carbon_thunk.type: type = fn_type @foo_short__carbon_thunk [concrete]
// CHECK:STDOUT:   %foo_short__carbon_thunk: %foo_short__carbon_thunk.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo_short = %foo_short.cpp_overload_set.value
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT:   %foo_short.cpp_overload_set.value: %foo_short.cpp_overload_set.type = cpp_overload_set_value @foo_short.cpp_overload_set [concrete = constants.%foo_short.cpp_overload_set.value]
// CHECK:STDOUT:   %foo_short__carbon_thunk.decl: %foo_short__carbon_thunk.type = fn_decl @foo_short__carbon_thunk [concrete = constants.%foo_short__carbon_thunk] {
// CHECK:STDOUT:     %return.patt: %pattern_type.54c = value_binding_pattern r#return [concrete]
// CHECK:STDOUT:     %return.param_patt: %pattern_type.54c = value_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %return.param: %ptr = value_param call_param0
// CHECK:STDOUT:     %.1: type = splice_block constants.%ptr [concrete = constants.%ptr] {
// CHECK:STDOUT:       %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
// CHECK:STDOUT:       %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %return: %ptr = value_binding r#return, %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:     .F = %F.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "short_return.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %x.patt: %pattern_type.2f8 = value_binding_pattern x [concrete]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo_short.ref: %foo_short.cpp_overload_set.type = name_ref foo_short, imports.%foo_short.cpp_overload_set.value [concrete = constants.%foo_short.cpp_overload_set.value]
// CHECK:STDOUT:   %.loc7_30.1: ref %i16 = temporary_storage
// CHECK:STDOUT:   %addr: %ptr = addr_of %.loc7_30.1
// CHECK:STDOUT:   %foo_short__carbon_thunk.call: init %empty_tuple.type = call imports.%foo_short__carbon_thunk.decl(%addr)
// CHECK:STDOUT:   %.loc7_30.2: init %i16 = in_place_init %foo_short__carbon_thunk.call, %.loc7_30.1
// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16 [concrete = constants.%i16] {
// CHECK:STDOUT:     %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
// CHECK:STDOUT:     %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %.loc7_30.3: %i16 = value_of_initializer %.loc7_30.2
// CHECK:STDOUT:   %.loc7_30.4: %i16 = converted %.loc7_30.2, %.loc7_30.3
// CHECK:STDOUT:   %x: %i16 = value_binding x, %.loc7_30.4
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @foo_short() -> %i16;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @foo_short__carbon_thunk(%return.param: %ptr);
// CHECK:STDOUT: