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carbon-lang/toolchain/check/testdata/struct/tuple_as_element.carbon
T
Geoff RomerandRichard Smith e5b05a1fac ExprCategory for guaranteed-in-place initializing expressions (#6623) 
The primary change in this PR is to split the `Initializing` expression
category into separate `ReprInitializing` and `InPlaceInitializing`
categories, depending on whether initialization uses the types
initializing representation, or is guaranteed to be in place. It also
rationalizes and documents the SemIR-level semantics of those categories
(including where #5545's "ephemeral entire reference" category will
fit), and introduces two new inst kinds to close gaps exposed in the
process.

Some additional secondary changes:
- Consistently format the storage arguments of initializers with `to`,
regardless of whether initialization is in-place, and document the `to`
notation.
- Rename some inst kinds and functions, and restructure some of the
code, for clarity and consistency with the new documentation.
- Resolve a TODO to handle more category conversions in
`CategoryConverter`, in order to make it easier to reason about category
conversions.

See #6588 and the review history of this PR for background.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2026-02-04 02:27:12 +00:00

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// 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
// 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/struct/tuple_as_element.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/struct/tuple_as_element.carbon
var x: {.a: i32, .b: (i32,)} = {.a = 1, .b = (2,)};
var y: {.a: i32, .b: (i32,)} = x;
// CHECK:STDOUT: --- tuple_as_element.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// 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: %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %tuple.type.85c: type = tuple_type (type) [concrete]
// CHECK:STDOUT: %tuple.896: %tuple.type.85c = tuple_value (%i32) [concrete]
// CHECK:STDOUT: %tuple.type.a1c: type = tuple_type (%i32) [concrete]
// CHECK:STDOUT: %struct_type.a.b.3d5: type = struct_type {.a: %i32, .b: %tuple.type.a1c} [concrete]
// CHECK:STDOUT: %pattern_type.b4d: type = pattern_type %struct_type.a.b.3d5 [concrete]
// CHECK:STDOUT: %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT: %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %tuple.type.985: type = tuple_type (Core.IntLiteral) [concrete]
// CHECK:STDOUT: %tuple.e7e: %tuple.type.985 = tuple_value (%int_2.ecc) [concrete]
// CHECK:STDOUT: %struct_type.a.b.057: type = struct_type {.a: Core.IntLiteral, .b: %tuple.type.985} [concrete]
// CHECK:STDOUT: %struct.60a: %struct_type.a.b.057 = struct_value (%int_1.5b8, %tuple.e7e) [concrete]
// CHECK:STDOUT: %.ae3: ref %i32 = struct_access file.%x.var, element0 [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.e8c: 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.4e6: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.3c2: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6 = struct_value () [symbolic]
// CHECK:STDOUT: %ImplicitAs.impl_witness.6bc: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.74f, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e0d: 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.0b5: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e0d = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet: %ImplicitAs.type.e8c = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.6bc) [concrete]
// CHECK:STDOUT: %.863: type = fn_type_with_self_type %ImplicitAs.Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.215: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.38b: <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: %.03e: ref %tuple.type.a1c = struct_access file.%x.var, element1 [concrete]
// CHECK:STDOUT: %tuple.elem0.83d: ref %i32 = tuple_access %.03e, element0 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.4e5: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5 [concrete]
// CHECK:STDOUT: %bound_method.646: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_2.ef8: %i32 = int_value 2 [concrete]
// CHECK:STDOUT: %tuple.092: %tuple.type.a1c = tuple_value (%int_2.ef8) [concrete]
// CHECK:STDOUT: %struct.646: %struct_type.a.b.3d5 = struct_value (%int_1.5d2, %tuple.092) [concrete]
// CHECK:STDOUT: %.a20: ref %i32 = struct_access file.%y.var, element0 [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.824: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.9b9: %Int.as.Copy.impl.Op.type.824 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.f17: <witness> = impl_witness imports.%Copy.impl_witness_table.e76, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.546: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.664: %Int.as.Copy.impl.Op.type.546 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %i32, (%Copy.impl_witness.f17) [concrete]
// CHECK:STDOUT: %.f79: type = fn_type_with_self_type %Copy.Op.type, %Copy.facet [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.664, @Int.as.Copy.impl.Op(%int_32) [concrete]
// CHECK:STDOUT: %.07f: ref %tuple.type.a1c = struct_access file.%y.var, element1 [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: .Copy = %Core.Copy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/parts/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
// CHECK:STDOUT: %Core.import_ref.42d: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6) = 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.3c2)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.74f = impl_witness_table (%Core.import_ref.42d), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT: %Core.import_ref.18d: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.824) = 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.9b9)]
// CHECK:STDOUT: %Copy.impl_witness_table.e76 = impl_witness_table (%Core.import_ref.18d), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .x = %x
// CHECK:STDOUT: .y = %y
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %x.patt: %pattern_type.b4d = ref_binding_pattern x [concrete]
// CHECK:STDOUT: %x.var_patt: %pattern_type.b4d = var_pattern %x.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.var: ref %struct_type.a.b.3d5 = var %x.var_patt [concrete]
// CHECK:STDOUT: %.loc15_28: type = splice_block %struct_type.a.b.loc15 [concrete = constants.%struct_type.a.b.3d5] {
// CHECK:STDOUT: %int_32.loc15_13: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_13: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %int_32.loc15_23: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_23: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %.loc15_27.1: %tuple.type.85c = tuple_literal (%i32.loc15_23) [concrete = constants.%tuple.896]
// CHECK:STDOUT: %.loc15_27.2: type = converted %.loc15_27.1, constants.%tuple.type.a1c [concrete = constants.%tuple.type.a1c]
// CHECK:STDOUT: %struct_type.a.b.loc15: type = struct_type {.a: %i32, .b: %tuple.type.a1c} [concrete = constants.%struct_type.a.b.3d5]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x: ref %struct_type.a.b.3d5 = ref_binding x, %x.var [concrete = %x.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %y.patt: %pattern_type.b4d = ref_binding_pattern y [concrete]
// CHECK:STDOUT: %y.var_patt: %pattern_type.b4d = var_pattern %y.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %y.var: ref %struct_type.a.b.3d5 = var %y.var_patt [concrete]
// CHECK:STDOUT: %.loc16_28: type = splice_block %struct_type.a.b.loc16 [concrete = constants.%struct_type.a.b.3d5] {
// CHECK:STDOUT: %int_32.loc16_13: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc16_13: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %int_32.loc16_23: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc16_23: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %.loc16_27.1: %tuple.type.85c = tuple_literal (%i32.loc16_23) [concrete = constants.%tuple.896]
// CHECK:STDOUT: %.loc16_27.2: type = converted %.loc16_27.1, constants.%tuple.type.a1c [concrete = constants.%tuple.type.a1c]
// CHECK:STDOUT: %struct_type.a.b.loc16: type = struct_type {.a: %i32, .b: %tuple.type.a1c} [concrete = constants.%struct_type.a.b.3d5]
// CHECK:STDOUT: }
// CHECK:STDOUT: %y: ref %struct_type.a.b.3d5 = ref_binding y, %y.var [concrete = %y.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT: %.loc15_49.1: %tuple.type.985 = tuple_literal (%int_2) [concrete = constants.%tuple.e7e]
// CHECK:STDOUT: %.loc15_50.1: %struct_type.a.b.057 = struct_literal (%int_1, %.loc15_49.1) [concrete = constants.%struct.60a]
// CHECK:STDOUT: %impl.elem0.loc15_50: %.863 = impl_witness_access constants.%ImplicitAs.impl_witness.6bc, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5]
// CHECK:STDOUT: %bound_method.loc15_50.1: <bound method> = bound_method %int_1, %impl.elem0.loc15_50 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.215]
// CHECK:STDOUT: %specific_fn.loc15_50: <specific function> = specific_function %impl.elem0.loc15_50, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc15_50.2: <bound method> = bound_method %int_1, %specific_fn.loc15_50 [concrete = constants.%bound_method.38b]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc15_50: init %i32 = call %bound_method.loc15_50.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc15_50.2: init %i32 = converted %int_1, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc15_50 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc15_50.3: ref %i32 = struct_access file.%x.var, element0 [concrete = constants.%.ae3]
// CHECK:STDOUT: %.loc15_50.4: init %i32 to %.loc15_50.3 = in_place_init %.loc15_50.2 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %impl.elem0.loc15_49: %.863 = impl_witness_access constants.%ImplicitAs.impl_witness.6bc, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5]
// CHECK:STDOUT: %bound_method.loc15_49.1: <bound method> = bound_method %int_2, %impl.elem0.loc15_49 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.4e5]
// CHECK:STDOUT: %specific_fn.loc15_49: <specific function> = specific_function %impl.elem0.loc15_49, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc15_49.2: <bound method> = bound_method %int_2, %specific_fn.loc15_49 [concrete = constants.%bound_method.646]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc15_49: init %i32 = call %bound_method.loc15_49.2(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc15_49.2: init %i32 = converted %int_2, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc15_49 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc15_50.5: ref %tuple.type.a1c = struct_access file.%x.var, element1 [concrete = constants.%.03e]
// CHECK:STDOUT: %.loc15_49.3: init %tuple.type.a1c to %.loc15_50.5 = tuple_init (%.loc15_49.2) [concrete = constants.%tuple.092]
// CHECK:STDOUT: %.loc15_50.6: init %tuple.type.a1c = converted %.loc15_49.1, %.loc15_49.3 [concrete = constants.%tuple.092]
// CHECK:STDOUT: %.loc15_50.7: init %tuple.type.a1c to %.loc15_50.5 = in_place_init %.loc15_50.6 [concrete = constants.%tuple.092]
// CHECK:STDOUT: %.loc15_50.8: init %struct_type.a.b.3d5 to file.%x.var = struct_init (%.loc15_50.4, %.loc15_50.7) [concrete = constants.%struct.646]
// CHECK:STDOUT: %.loc15_1: init %struct_type.a.b.3d5 = converted %.loc15_50.1, %.loc15_50.8 [concrete = constants.%struct.646]
// CHECK:STDOUT: assign file.%x.var, %.loc15_1
// CHECK:STDOUT: %x.ref: ref %struct_type.a.b.3d5 = name_ref x, file.%x [concrete = file.%x.var]
// CHECK:STDOUT: %.loc16_32.1: ref %i32 = struct_access %x.ref, element0 [concrete = constants.%.ae3]
// CHECK:STDOUT: %.loc16_32.2: %i32 = acquire_value %.loc16_32.1
// CHECK:STDOUT: %impl.elem0.loc16_32.1: %.f79 = impl_witness_access constants.%Copy.impl_witness.f17, element0 [concrete = constants.%Int.as.Copy.impl.Op.664]
// CHECK:STDOUT: %bound_method.loc16_32.1: <bound method> = bound_method %.loc16_32.2, %impl.elem0.loc16_32.1
// CHECK:STDOUT: %specific_fn.loc16_32.1: <specific function> = specific_function %impl.elem0.loc16_32.1, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc16_32.2: <bound method> = bound_method %.loc16_32.2, %specific_fn.loc16_32.1
// CHECK:STDOUT: %Int.as.Copy.impl.Op.call.loc16_32.1: init %i32 = call %bound_method.loc16_32.2(%.loc16_32.2)
// CHECK:STDOUT: %.loc16_32.3: ref %i32 = struct_access file.%y.var, element0 [concrete = constants.%.a20]
// CHECK:STDOUT: %.loc16_32.4: init %i32 to %.loc16_32.3 = in_place_init %Int.as.Copy.impl.Op.call.loc16_32.1
// CHECK:STDOUT: %.loc16_32.5: ref %tuple.type.a1c = struct_access %x.ref, element1 [concrete = constants.%.03e]
// CHECK:STDOUT: %tuple.elem0: ref %i32 = tuple_access %.loc16_32.5, element0 [concrete = constants.%tuple.elem0.83d]
// CHECK:STDOUT: %.loc16_32.6: %i32 = acquire_value %tuple.elem0
// CHECK:STDOUT: %impl.elem0.loc16_32.2: %.f79 = impl_witness_access constants.%Copy.impl_witness.f17, element0 [concrete = constants.%Int.as.Copy.impl.Op.664]
// CHECK:STDOUT: %bound_method.loc16_32.3: <bound method> = bound_method %.loc16_32.6, %impl.elem0.loc16_32.2
// CHECK:STDOUT: %specific_fn.loc16_32.2: <specific function> = specific_function %impl.elem0.loc16_32.2, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc16_32.4: <bound method> = bound_method %.loc16_32.6, %specific_fn.loc16_32.2
// CHECK:STDOUT: %Int.as.Copy.impl.Op.call.loc16_32.2: init %i32 = call %bound_method.loc16_32.4(%.loc16_32.6)
// CHECK:STDOUT: %.loc16_32.7: ref %tuple.type.a1c = struct_access file.%y.var, element1 [concrete = constants.%.07f]
// CHECK:STDOUT: %.loc16_32.8: init %tuple.type.a1c to %.loc16_32.7 = tuple_init (%Int.as.Copy.impl.Op.call.loc16_32.2)
// CHECK:STDOUT: %.loc16_32.9: init %tuple.type.a1c = converted %.loc16_32.5, %.loc16_32.8
// CHECK:STDOUT: %.loc16_32.10: init %tuple.type.a1c to %.loc16_32.7 = in_place_init %.loc16_32.9
// CHECK:STDOUT: %.loc16_32.11: init %struct_type.a.b.3d5 to file.%y.var = struct_init (%.loc16_32.4, %.loc16_32.10)
// CHECK:STDOUT: %.loc16_1: init %struct_type.a.b.3d5 = converted %x.ref, %.loc16_32.11
// CHECK:STDOUT: assign file.%y.var, %.loc16_1
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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