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carbon-lang/toolchain/check/testdata/named_constraint/empty_generic.carbon
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Dana Jansens fcae9610bd Make SemIR::TypeType be an empty FacetType instruction (#7813) 
The type `type` is now a `FacetType` inst with no constraints. This
brings the model implemented in the toolchain into better alignment with
the language design. The `SemIR::TypeType` struct remains as a scope for
holding the `TypeInstId`, `ConstantId`, and `TypeId` constants, but is
not an `InstKind` anymore.

The `TypeType` inst looks a lot like singletons, but there are many
`FacetType` insts so it doesn't quite fit that model. So we put it
alongside singletons with a fixed inst id but refer to it as a more
general "builtin" inst that is not a singleton.
`Namespace::PackageInstId` is similar, and we group it with `TypeType`
conceptually as another builtin instruction with a fixed id.

No conversion is needed anymore to use a `type` as a facet, since types
also have a `FacetType` type. This simplifies and removes a number of
helpers and branches throughout the code.

The `TypeType` inst is now part of the constant store, so we end up
printing it in the constants block in every test. But it's also named
`type` rather than `%type` to preserve the majority of existing
formatting behaviour, though this does look different from other
constants.

Assisted-by: Opus 5 was used to generate a first draft and validate the
refactoring. Though nearly everything non-trivial the tool wrote has
been modified or rewritten.
2026-09-22 15:04:40 +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/none.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/named_constraint/empty_generic.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/named_constraint/empty_generic.carbon
interface Z {}
//@dump-sem-ir-begin
constraint Empty(T: type) {}
fn F(generic T: type, unused generic U: Empty(T)) {}
fn G(generic T: Z, generic U: Empty(T), generic V: type) {
F(T, {} as type);
F(T, type);
F(T, T);
F(T, U);
F(T, V);
}
//@dump-sem-ir-end
// CHECK:STDOUT: --- empty_generic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %Z.type: type = facet_type <@Z> [concrete]
// CHECK:STDOUT: %.Self.frozen: type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %pattern_type.9a587c.1: type = pattern_type type [concrete]
// CHECK:STDOUT: %T.patt.3a0: %pattern_type.9a587c.1 = symbolic_binding_pattern T, 0 [symbolic]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %Empty.type.f30: type = generic_named_constaint_type @Empty [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %empty_struct.26b: %Empty.type.f30 = struct_value () [concrete]
// CHECK:STDOUT: %Empty.type.d682d6.1: type = facet_type <@Empty, @Empty(%T.67d)> [symbolic]
// CHECK:STDOUT: %Self.22b: %Empty.type.d682d6.1 = symbolic_binding Self, 1 [symbolic]
// CHECK:STDOUT: %pattern_type.9a587c.2: type = pattern_type %Empty.type.d682d6.1 [symbolic]
// CHECK:STDOUT: %U.patt.cb839c.1: %pattern_type.9a587c.2 = symbolic_binding_pattern U, 1 [symbolic]
// CHECK:STDOUT: %U.e1f642.1: %Empty.type.d682d6.1 = symbolic_binding U, 1 [symbolic]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.5d7: type = pattern_type %Z.type [concrete]
// CHECK:STDOUT: %T.patt.4a7: %pattern_type.5d7 = symbolic_binding_pattern T, 0 [symbolic]
// CHECK:STDOUT: %T.013: %Z.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.013 [symbolic]
// CHECK:STDOUT: %Empty.type.d682d6.2: type = facet_type <@Empty, @Empty(%T.as_type)> [symbolic]
// CHECK:STDOUT: %pattern_type.9a587c.3: type = pattern_type %Empty.type.d682d6.2 [symbolic]
// CHECK:STDOUT: %U.patt.cb839c.2: %pattern_type.9a587c.3 = symbolic_binding_pattern U, 1 [symbolic]
// CHECK:STDOUT: %U.e1f642.2: %Empty.type.d682d6.2 = symbolic_binding U, 1 [symbolic]
// CHECK:STDOUT: %V.patt: %pattern_type.9a587c.1 = symbolic_binding_pattern V, 2 [symbolic]
// CHECK:STDOUT: %V: type = symbolic_binding V, 2 [symbolic]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %empty_struct.a40: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT: %Empty.facet.76f: %Empty.type.d682d6.2 = facet_value %empty_struct_type, () [symbolic]
// CHECK:STDOUT: %U.patt.cb839c.3: %pattern_type.9a587c.3 = symbolic_binding_pattern U, 1 [symbolic]
// CHECK:STDOUT: %F.specific_fn.eb3: <specific function> = specific_function %F, @F(%T.as_type, %Empty.facet.76f) [symbolic]
// CHECK:STDOUT: %Empty.facet.bab: %Empty.type.d682d6.2 = facet_value type, () [symbolic]
// CHECK:STDOUT: %F.specific_fn.2fa: <specific function> = specific_function %F, @F(%T.as_type, %Empty.facet.bab) [symbolic]
// CHECK:STDOUT: %Empty.facet.aa1: %Empty.type.d682d6.2 = facet_value %T.as_type, () [symbolic]
// CHECK:STDOUT: %F.specific_fn.7a2: <specific function> = specific_function %F, @F(%T.as_type, %Empty.facet.aa1) [symbolic]
// CHECK:STDOUT: %F.specific_fn.ff9: <specific function> = specific_function %F, @F(%T.as_type, %U.e1f642.2) [symbolic]
// CHECK:STDOUT: %Empty.facet.ed5: %Empty.type.d682d6.2 = facet_value %V, () [symbolic]
// CHECK:STDOUT: %F.specific_fn.67d: <specific function> = specific_function %F, @F(%T.as_type, %Empty.facet.ed5) [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Empty.decl: %Empty.type.f30 = constraint_decl @Empty [concrete = constants.%empty_struct.26b] {
// CHECK:STDOUT: %T.patt.loc16_19.1: %pattern_type.9a587c.1 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc16_19.2 (constants.%T.patt.3a0)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc16_21.1: type = splice_block %.loc16_21.2 [concrete = type] {
// CHECK:STDOUT: %.Self.frozen: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %.loc16_21.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc16_19.2: type = symbolic_binding T, 0 [symbolic = %T.loc16_19.1 (constants.%T.67d)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %T.patt.loc18_15.1: %pattern_type.9a587c.1 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc18_15.2 (constants.%T.patt.3a0)]
// CHECK:STDOUT: %U.patt.loc18_39.1: @F.%pattern_type (%pattern_type.9a587c.2) = symbolic_binding_pattern U, 1 [symbolic = %U.patt.loc18_39.2 (constants.%U.patt.cb839c.1)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc18_17.1: type = splice_block %.loc18_17.2 [concrete = type] {
// CHECK:STDOUT: %.Self.frozen.loc18_15: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %.loc18_17.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc18_15.2: type = symbolic_binding T, 0 [symbolic = %T.loc18_15.1 (constants.%T.67d)]
// CHECK:STDOUT: %.loc18_48: type = splice_block %Empty.type.loc18_48.2 [symbolic = %Empty.type.loc18_48.1 (constants.%Empty.type.d682d6.1)] {
// CHECK:STDOUT: %.Self.frozen.loc18_39: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %Empty.ref: %Empty.type.f30 = name_ref Empty, file.%Empty.decl [concrete = constants.%empty_struct.26b]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc18_15.2 [symbolic = %T.loc18_15.1 (constants.%T.67d)]
// CHECK:STDOUT: %Empty.type.loc18_48.2: type = facet_type <@Empty, @Empty(constants.%T.67d)> [symbolic = %Empty.type.loc18_48.1 (constants.%Empty.type.d682d6.1)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %U.loc18_39.2: @F.%Empty.type.loc18_48.1 (%Empty.type.d682d6.1) = symbolic_binding U, 1 [symbolic = %U.loc18_39.1 (constants.%U.e1f642.1)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %T.patt.loc20_15.1: %pattern_type.5d7 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc20_15.2 (constants.%T.patt.4a7)]
// CHECK:STDOUT: %U.patt.loc20_29.1: @G.%pattern_type (%pattern_type.9a587c.3) = symbolic_binding_pattern U, 1 [symbolic = %U.patt.loc20_29.2 (constants.%U.patt.cb839c.2)]
// CHECK:STDOUT: %V.patt.loc20_50.1: %pattern_type.9a587c.1 = symbolic_binding_pattern V, 2 [symbolic = %V.patt.loc20_50.2 (constants.%V.patt)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc20_17: type = splice_block %Z.ref [concrete = constants.%Z.type] {
// CHECK:STDOUT: %.Self.frozen.loc20_15: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %Z.ref: type = name_ref Z, file.%Z.decl [concrete = constants.%Z.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc20_15.2: %Z.type = symbolic_binding T, 0 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %.loc20_38.1: type = splice_block %Empty.type.loc20_38.2 [symbolic = %Empty.type.loc20_38.1 (constants.%Empty.type.d682d6.2)] {
// CHECK:STDOUT: %.Self.frozen.loc20_29: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %Empty.ref: %Empty.type.f30 = name_ref Empty, file.%Empty.decl [concrete = constants.%empty_struct.26b]
// CHECK:STDOUT: %T.ref.loc20: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %T.as_type.loc20_38.2: type = facet_access_type %T.ref.loc20 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc20_38.2: type = converted %T.ref.loc20, %T.as_type.loc20_38.2 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.type.loc20_38.2: type = facet_type <@Empty, @Empty(constants.%T.as_type)> [symbolic = %Empty.type.loc20_38.1 (constants.%Empty.type.d682d6.2)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %U.loc20_29.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = symbolic_binding U, 1 [symbolic = %U.loc20_29.1 (constants.%U.e1f642.2)]
// CHECK:STDOUT: %.loc20_52.1: type = splice_block %.loc20_52.2 [concrete = type] {
// CHECK:STDOUT: %.Self.frozen.loc20_50: type = symbolic_binding .Self [symbolic_self = constants.%.Self.frozen]
// CHECK:STDOUT: %.loc20_52.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %V.loc20_50.2: type = symbolic_binding V, 2 [symbolic = %V.loc20_50.1 (constants.%V)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic constraint @Empty(%T.loc16_19.2: type) {
// CHECK:STDOUT: %T.patt.loc16_19.2: %pattern_type.9a587c.1 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc16_19.2 (constants.%T.patt.3a0)]
// CHECK:STDOUT: %T.loc16_19.1: type = symbolic_binding T, 0 [symbolic = %T.loc16_19.1 (constants.%T.67d)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Empty.type: type = facet_type <@Empty, @Empty(%T.loc16_19.1)> [symbolic = %Empty.type (constants.%Empty.type.d682d6.1)]
// CHECK:STDOUT: %Self.loc16_27.2: @Empty.%Empty.type (%Empty.type.d682d6.1) = symbolic_binding Self, 1 [symbolic = %Self.loc16_27.2 (constants.%Self.22b)]
// CHECK:STDOUT:
// CHECK:STDOUT: constraint {
// CHECK:STDOUT: %Self.loc16_27.1: @Empty.%Empty.type (%Empty.type.d682d6.1) = symbolic_binding Self, 1 [symbolic = %Self.loc16_27.2 (constants.%Self.22b)]
// CHECK:STDOUT: %Empty.WithSelf.decl = constraint_with_self_decl @Empty [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self.loc16_27.1
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F(%T.loc18_15.2: type, %U.loc18_39.2: @F.%Empty.type.loc18_48.1 (%Empty.type.d682d6.1)) {
// CHECK:STDOUT: %T.patt.loc18_15.2: %pattern_type.9a587c.1 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc18_15.2 (constants.%T.patt.3a0)]
// CHECK:STDOUT: %T.loc18_15.1: type = symbolic_binding T, 0 [symbolic = %T.loc18_15.1 (constants.%T.67d)]
// CHECK:STDOUT: %Empty.type.loc18_48.1: type = facet_type <@Empty, @Empty(%T.loc18_15.1)> [symbolic = %Empty.type.loc18_48.1 (constants.%Empty.type.d682d6.1)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Empty.type.loc18_48.1 [symbolic = %pattern_type (constants.%pattern_type.9a587c.2)]
// CHECK:STDOUT: %U.patt.loc18_39.2: @F.%pattern_type (%pattern_type.9a587c.2) = symbolic_binding_pattern U, 1 [symbolic = %U.patt.loc18_39.2 (constants.%U.patt.cb839c.1)]
// CHECK:STDOUT: %U.loc18_39.1: @F.%Empty.type.loc18_48.1 (%Empty.type.d682d6.1) = symbolic_binding U, 1 [symbolic = %U.loc18_39.1 (constants.%U.e1f642.1)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(%T.loc20_15.2: %Z.type, %U.loc20_29.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2), %V.loc20_50.2: type) {
// CHECK:STDOUT: %T.patt.loc20_15.2: %pattern_type.5d7 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc20_15.2 (constants.%T.patt.4a7)]
// CHECK:STDOUT: %T.loc20_15.1: %Z.type = symbolic_binding T, 0 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %T.as_type.loc20_38.1: type = facet_access_type %T.loc20_15.1 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.type.loc20_38.1: type = facet_type <@Empty, @Empty(%T.as_type.loc20_38.1)> [symbolic = %Empty.type.loc20_38.1 (constants.%Empty.type.d682d6.2)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Empty.type.loc20_38.1 [symbolic = %pattern_type (constants.%pattern_type.9a587c.3)]
// CHECK:STDOUT: %U.patt.loc20_29.2: @G.%pattern_type (%pattern_type.9a587c.3) = symbolic_binding_pattern U, 1 [symbolic = %U.patt.loc20_29.2 (constants.%U.patt.cb839c.2)]
// CHECK:STDOUT: %U.loc20_29.1: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = symbolic_binding U, 1 [symbolic = %U.loc20_29.1 (constants.%U.e1f642.2)]
// CHECK:STDOUT: %V.patt.loc20_50.2: %pattern_type.9a587c.1 = symbolic_binding_pattern V, 2 [symbolic = %V.patt.loc20_50.2 (constants.%V.patt)]
// CHECK:STDOUT: %V.loc20_50.1: type = symbolic_binding V, 2 [symbolic = %V.loc20_50.1 (constants.%V)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Empty.facet.loc21_18.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value constants.%empty_struct_type, () [symbolic = %Empty.facet.loc21_18.2 (constants.%Empty.facet.76f)]
// CHECK:STDOUT: %F.specific_fn.loc21_3.2: <specific function> = specific_function constants.%F, @F(%T.as_type.loc20_38.1, %Empty.facet.loc21_18.2) [symbolic = %F.specific_fn.loc21_3.2 (constants.%F.specific_fn.eb3)]
// CHECK:STDOUT: %Empty.facet.loc22_12.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value type, () [symbolic = %Empty.facet.loc22_12.2 (constants.%Empty.facet.bab)]
// CHECK:STDOUT: %F.specific_fn.loc22_3.2: <specific function> = specific_function constants.%F, @F(%T.as_type.loc20_38.1, %Empty.facet.loc22_12.2) [symbolic = %F.specific_fn.loc22_3.2 (constants.%F.specific_fn.2fa)]
// CHECK:STDOUT: %Empty.facet.loc23_9.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value %T.as_type.loc20_38.1, () [symbolic = %Empty.facet.loc23_9.2 (constants.%Empty.facet.aa1)]
// CHECK:STDOUT: %F.specific_fn.loc23_3.2: <specific function> = specific_function constants.%F, @F(%T.as_type.loc20_38.1, %Empty.facet.loc23_9.2) [symbolic = %F.specific_fn.loc23_3.2 (constants.%F.specific_fn.7a2)]
// CHECK:STDOUT: %F.specific_fn.loc24_3.2: <specific function> = specific_function constants.%F, @F(%T.as_type.loc20_38.1, %U.loc20_29.1) [symbolic = %F.specific_fn.loc24_3.2 (constants.%F.specific_fn.ff9)]
// CHECK:STDOUT: %Empty.facet.loc25_9.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value %V.loc20_50.1, () [symbolic = %Empty.facet.loc25_9.2 (constants.%Empty.facet.ed5)]
// CHECK:STDOUT: %F.specific_fn.loc25_3.2: <specific function> = specific_function constants.%F, @F(%T.as_type.loc20_38.1, %Empty.facet.loc25_9.2) [symbolic = %F.specific_fn.loc25_3.2 (constants.%F.specific_fn.67d)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref.loc21: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref.loc21: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %.loc21_9: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct.a40]
// CHECK:STDOUT: %.loc21_14: type = type_literal type [concrete = type]
// CHECK:STDOUT: %.loc21_11: type = converted %.loc21_9, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT: %T.as_type.loc21: type = facet_access_type %T.ref.loc21 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc21_18.1: type = converted %T.ref.loc21, %T.as_type.loc21 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.facet.loc21_18.1: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value constants.%empty_struct_type, () [symbolic = %Empty.facet.loc21_18.2 (constants.%Empty.facet.76f)]
// CHECK:STDOUT: %.loc21_18.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = converted constants.%empty_struct_type, %Empty.facet.loc21_18.1 [symbolic = %Empty.facet.loc21_18.2 (constants.%Empty.facet.76f)]
// CHECK:STDOUT: %F.specific_fn.loc21_3.1: <specific function> = specific_function %F.ref.loc21, @F(constants.%T.as_type, constants.%Empty.facet.76f) [symbolic = %F.specific_fn.loc21_3.2 (constants.%F.specific_fn.eb3)]
// CHECK:STDOUT: %F.call.loc21: init %empty_tuple.type = call %F.specific_fn.loc21_3.1()
// CHECK:STDOUT: %F.ref.loc22: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref.loc22: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %.loc22_8: type = type_literal type [concrete = type]
// CHECK:STDOUT: %T.as_type.loc22: type = facet_access_type %T.ref.loc22 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc22_12.1: type = converted %T.ref.loc22, %T.as_type.loc22 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.facet.loc22_12.1: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value type, () [symbolic = %Empty.facet.loc22_12.2 (constants.%Empty.facet.bab)]
// CHECK:STDOUT: %.loc22_12.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = converted type, %Empty.facet.loc22_12.1 [symbolic = %Empty.facet.loc22_12.2 (constants.%Empty.facet.bab)]
// CHECK:STDOUT: %F.specific_fn.loc22_3.1: <specific function> = specific_function %F.ref.loc22, @F(constants.%T.as_type, constants.%Empty.facet.bab) [symbolic = %F.specific_fn.loc22_3.2 (constants.%F.specific_fn.2fa)]
// CHECK:STDOUT: %F.call.loc22: init %empty_tuple.type = call %F.specific_fn.loc22_3.1()
// CHECK:STDOUT: %F.ref.loc23: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref.loc23_5: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %T.ref.loc23_8: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %T.as_type.loc23_9.1: type = facet_access_type %T.ref.loc23_5 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc23_9.1: type = converted %T.ref.loc23_5, %T.as_type.loc23_9.1 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %T.as_type.loc23_9.2: type = facet_access_type constants.%T.013 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.facet.loc23_9.1: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value %T.as_type.loc23_9.2, () [symbolic = %Empty.facet.loc23_9.2 (constants.%Empty.facet.aa1)]
// CHECK:STDOUT: %.loc23_9.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = converted constants.%T.013, %Empty.facet.loc23_9.1 [symbolic = %Empty.facet.loc23_9.2 (constants.%Empty.facet.aa1)]
// CHECK:STDOUT: %F.specific_fn.loc23_3.1: <specific function> = specific_function %F.ref.loc23, @F(constants.%T.as_type, constants.%Empty.facet.aa1) [symbolic = %F.specific_fn.loc23_3.2 (constants.%F.specific_fn.7a2)]
// CHECK:STDOUT: %F.call.loc23: init %empty_tuple.type = call %F.specific_fn.loc23_3.1()
// CHECK:STDOUT: %F.ref.loc24: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref.loc24: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %U.ref: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = name_ref U, %U.loc20_29.2 [symbolic = %U.loc20_29.1 (constants.%U.e1f642.2)]
// CHECK:STDOUT: %T.as_type.loc24: type = facet_access_type %T.ref.loc24 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc24: type = converted %T.ref.loc24, %T.as_type.loc24 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %F.specific_fn.loc24_3.1: <specific function> = specific_function %F.ref.loc24, @F(constants.%T.as_type, constants.%U.e1f642.2) [symbolic = %F.specific_fn.loc24_3.2 (constants.%F.specific_fn.ff9)]
// CHECK:STDOUT: %F.call.loc24: init %empty_tuple.type = call %F.specific_fn.loc24_3.1()
// CHECK:STDOUT: %F.ref.loc25: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref.loc25: %Z.type = name_ref T, %T.loc20_15.2 [symbolic = %T.loc20_15.1 (constants.%T.013)]
// CHECK:STDOUT: %V.ref: type = name_ref V, %V.loc20_50.2 [symbolic = %V.loc20_50.1 (constants.%V)]
// CHECK:STDOUT: %T.as_type.loc25: type = facet_access_type %T.ref.loc25 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %.loc25_9.1: type = converted %T.ref.loc25, %T.as_type.loc25 [symbolic = %T.as_type.loc20_38.1 (constants.%T.as_type)]
// CHECK:STDOUT: %Empty.facet.loc25_9.1: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = facet_value constants.%V, () [symbolic = %Empty.facet.loc25_9.2 (constants.%Empty.facet.ed5)]
// CHECK:STDOUT: %.loc25_9.2: @G.%Empty.type.loc20_38.1 (%Empty.type.d682d6.2) = converted constants.%V, %Empty.facet.loc25_9.1 [symbolic = %Empty.facet.loc25_9.2 (constants.%Empty.facet.ed5)]
// CHECK:STDOUT: %F.specific_fn.loc25_3.1: <specific function> = specific_function %F.ref.loc25, @F(constants.%T.as_type, constants.%Empty.facet.ed5) [symbolic = %F.specific_fn.loc25_3.2 (constants.%F.specific_fn.67d)]
// CHECK:STDOUT: %F.call.loc25: init %empty_tuple.type = call %F.specific_fn.loc25_3.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty(constants.%T.67d) {
// CHECK:STDOUT: %T.patt.loc16_19.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc16_19.1 => constants.%T.67d
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%T.67d, constants.%Self.22b) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.67d, constants.%U.e1f642.1) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.67d
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.1
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.2
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.1
// CHECK:STDOUT: %U.loc18_39.1 => constants.%U.e1f642.1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty(constants.%T.as_type) {
// CHECK:STDOUT: %T.patt.loc16_19.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc16_19.1 => constants.%T.as_type
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%T.013, constants.%U.e1f642.2, constants.%V) {
// CHECK:STDOUT: %T.patt.loc20_15.2 => constants.%T.patt.4a7
// CHECK:STDOUT: %T.loc20_15.1 => constants.%T.013
// CHECK:STDOUT: %T.as_type.loc20_38.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc20_38.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc20_29.2 => constants.%U.patt.cb839c.2
// CHECK:STDOUT: %U.loc20_29.1 => constants.%U.e1f642.2
// CHECK:STDOUT: %V.patt.loc20_50.2 => constants.%V.patt
// CHECK:STDOUT: %V.loc20_50.1 => constants.%V
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%T.as_type, constants.%empty_struct_type) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.as_type, constants.%Empty.facet.76f) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.3
// CHECK:STDOUT: %U.loc18_39.1 => constants.%Empty.facet.76f
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%T.as_type, type) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.as_type, constants.%Empty.facet.bab) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.3
// CHECK:STDOUT: %U.loc18_39.1 => constants.%Empty.facet.bab
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%T.as_type, constants.%T.013) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.as_type, constants.%Empty.facet.aa1) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.3
// CHECK:STDOUT: %U.loc18_39.1 => constants.%Empty.facet.aa1
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.as_type, constants.%U.e1f642.2) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.3
// CHECK:STDOUT: %U.loc18_39.1 => constants.%U.e1f642.2
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%T.as_type, constants.%V) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.as_type, constants.%Empty.facet.ed5) {
// CHECK:STDOUT: %T.patt.loc18_15.2 => constants.%T.patt.3a0
// CHECK:STDOUT: %T.loc18_15.1 => constants.%T.as_type
// CHECK:STDOUT: %Empty.type.loc18_48.1 => constants.%Empty.type.d682d6.2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.9a587c.3
// CHECK:STDOUT: %U.patt.loc18_39.2 => constants.%U.patt.cb839c.3
// CHECK:STDOUT: %U.loc18_39.1 => constants.%Empty.facet.ed5
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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