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7c1798d96dfe798eb799c3a0b69e84988a04619c
carbon-lang/toolchain/check/testdata/interface/final.carbon
T
Dana Jansens 7c1798d96d Format impl witness instructions as part of the impl (#6485) 
The impl's body block has to end before we make its ImplDecl
instruction, and the witness instructions come later, so they don't end
up in the body block. Currently they just end up in the enclosing (file,
typically, or class) scope block.

Add a new InstBlockId to Impl for holding witness instructions, and
explicitly insert them into that block. Then include those instructions
into the scope of the Impl for naming, and format them into the Impl
right after the body block.

This is based on #6484
2025-12-17 15:46:30 +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/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interface/final.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/final.carbon
// --- require_complete_impl.carbon
//@include-in-dumps
library "[[@TEST_NAME]]";
interface I { fn F(); }
interface J {}
final impl forall [T:! J] T as I { fn F() {} }
// This is creating an indirection where the `final impl` requires an indirect
// instantiation by the caller.
fn UseI(T:! I) { T.F(); }
fn UseJ(T:! J) { UseI(T); }
class C {}
impl C as J {}
fn Use() { UseJ(C); }
// CHECK:STDOUT: --- require_complete_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self.dba: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %I.F.type: type = fn_type @I.F [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %I.F: %I.F.type = struct_value () [concrete]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.%I.F.decl [concrete]
// CHECK:STDOUT: %J.type: type = facet_type <@J> [concrete]
// CHECK:STDOUT: %Self.da6: %J.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %T.a68: %J.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.70b: type = pattern_type %J.type [concrete]
// CHECK:STDOUT: %T.binding.as_type.735: type = symbolic_binding_type T, 0, %T.a68 [symbolic]
// CHECK:STDOUT: %I.impl_witness.234: <witness> = impl_witness @T.binding.as_type.as.I.impl.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.a68) [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type.746: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%T.a68) [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.5ca: %T.binding.as_type.as.I.impl.F.type.746 = struct_value () [symbolic]
// CHECK:STDOUT: %I.facet.077: %I.type = facet_value %T.binding.as_type.735, (%I.impl_witness.234) [symbolic]
// CHECK:STDOUT: %T.50f: %I.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.a15: type = pattern_type %I.type [concrete]
// CHECK:STDOUT: %UseI.type: type = fn_type @UseI [concrete]
// CHECK:STDOUT: %UseI: %UseI.type = struct_value () [concrete]
// CHECK:STDOUT: %T.binding.as_type.419: type = symbolic_binding_type T, 0, %T.50f [symbolic]
// CHECK:STDOUT: %I.lookup_impl_witness: <witness> = lookup_impl_witness %T.50f, @I [symbolic]
// CHECK:STDOUT: %.766: type = fn_type_with_self_type %I.F.type, %T.50f [symbolic]
// CHECK:STDOUT: %impl.elem0: %.766 = impl_witness_access %I.lookup_impl_witness, element0 [symbolic]
// CHECK:STDOUT: %specific_impl_fn: <specific function> = specific_impl_function %impl.elem0, @I.F(%T.50f) [symbolic]
// CHECK:STDOUT: %UseJ.type: type = fn_type @UseJ [concrete]
// CHECK:STDOUT: %UseJ: %UseJ.type = struct_value () [concrete]
// CHECK:STDOUT: %.5bd: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%T.a68) [symbolic]
// CHECK:STDOUT: %UseI.specific_fn.8ea: <specific function> = specific_function %UseI, @UseI(%I.facet.077) [symbolic]
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %J.impl_witness: <witness> = impl_witness @C.as.J.impl.%J.impl_witness_table [concrete]
// CHECK:STDOUT: %Use.type: type = fn_type @Use [concrete]
// CHECK:STDOUT: %Use: %Use.type = struct_value () [concrete]
// CHECK:STDOUT: %J.facet: %J.type = facet_value %C, (%J.impl_witness) [concrete]
// CHECK:STDOUT: %UseJ.specific_fn: <specific function> = specific_function %UseJ, @UseJ(%J.facet) [concrete]
// CHECK:STDOUT: %.fdb: type = fn_type_with_self_type %I.F.type, %I.facet.077 [symbolic]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.specific_fn.0af: <specific function> = specific_function %T.binding.as_type.as.I.impl.F.5ca, @T.binding.as_type.as.I.impl.F(%T.a68) [symbolic]
// CHECK:STDOUT: %I.impl_witness.3e0: <witness> = impl_witness @T.binding.as_type.as.I.impl.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type.479: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.bac: %T.binding.as_type.as.I.impl.F.type.479 = struct_value () [concrete]
// CHECK:STDOUT: %.ac1: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%J.facet) [concrete]
// CHECK:STDOUT: %I.facet.744: %I.type = facet_value %C, (%I.impl_witness.3e0) [concrete]
// CHECK:STDOUT: %UseI.specific_fn.3c7: <specific function> = specific_function %UseI, @UseI(%I.facet.744) [concrete]
// CHECK:STDOUT: %.1e8: type = fn_type_with_self_type %I.F.type, %I.facet.744 [concrete]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.specific_fn.0b8: <specific function> = specific_function %T.binding.as_type.as.I.impl.F.bac, @T.binding.as_type.as.I.impl.F(%J.facet) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: .J = %J.decl
// CHECK:STDOUT: .UseI = %UseI.decl
// CHECK:STDOUT: .UseJ = %UseJ.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .Use = %Use.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: %J.decl: type = interface_decl @J [concrete = constants.%J.type] {} {}
// CHECK:STDOUT: impl_decl @T.binding.as_type.as.I.impl [concrete] {
// CHECK:STDOUT: %T.patt: %pattern_type.70b = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %T.ref: %J.type = name_ref T, %T.loc7_20.2 [symbolic = %T.loc7_20.1 (constants.%T.a68)]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.735)]
// CHECK:STDOUT: %.loc7_27: type = converted %T.ref, %T.as_type [symbolic = %T.binding.as_type (constants.%T.binding.as_type.735)]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: %.loc7_24: type = splice_block %J.ref [concrete = constants.%J.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc7_20.2: %J.type = symbolic_binding T, 0 [symbolic = %T.loc7_20.1 (constants.%T.a68)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %UseI.decl: %UseI.type = fn_decl @UseI [concrete = constants.%UseI] {
// CHECK:STDOUT: %T.patt: %pattern_type.a15 = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc11_13: type = splice_block %I.ref [concrete = constants.%I.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc11_9.2: %I.type = symbolic_binding T, 0 [symbolic = %T.loc11_9.1 (constants.%T.50f)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %UseJ.decl: %UseJ.type = fn_decl @UseJ [concrete = constants.%UseJ] {
// CHECK:STDOUT: %T.patt: %pattern_type.70b = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc12_13: type = splice_block %J.ref [concrete = constants.%J.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc12_9.2: %J.type = symbolic_binding T, 0 [symbolic = %T.loc12_9.1 (constants.%T.a68)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @C.as.J.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %Use.decl: %Use.type = fn_decl @Use [concrete = constants.%Use] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self.dba]
// CHECK:STDOUT: %I.F.decl: %I.F.type = fn_decl @I.F [concrete = constants.%I.F] {} {}
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, %I.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = %assoc0
// CHECK:STDOUT: witness = (%I.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J {
// CHECK:STDOUT: %Self: %J.type = symbolic_binding Self, 0 [symbolic = constants.%Self.da6]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic impl @T.binding.as_type.as.I.impl(%T.loc7_20.2: %J.type) {
// CHECK:STDOUT: %T.loc7_20.1: %J.type = symbolic_binding T, 0 [symbolic = %T.loc7_20.1 (constants.%T.a68)]
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc7_20.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.735)]
// CHECK:STDOUT: %I.impl_witness.loc7_34.2: <witness> = impl_witness %I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.loc7_20.1) [symbolic = %I.impl_witness.loc7_34.2 (constants.%I.impl_witness.234)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type: type = fn_type @T.binding.as_type.as.I.impl.F, @T.binding.as_type.as.I.impl(%T.loc7_20.1) [symbolic = %T.binding.as_type.as.I.impl.F.type (constants.%T.binding.as_type.as.I.impl.F.type.746)]
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F: @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F.type (%T.binding.as_type.as.I.impl.F.type.746) = struct_value () [symbolic = %T.binding.as_type.as.I.impl.F (constants.%T.binding.as_type.as.I.impl.F.5ca)]
// CHECK:STDOUT:
// CHECK:STDOUT: impl: %.loc7_27 as %I.ref {
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.decl: @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F.type (%T.binding.as_type.as.I.impl.F.type.746) = fn_decl @T.binding.as_type.as.I.impl.F [symbolic = @T.binding.as_type.as.I.impl.%T.binding.as_type.as.I.impl.F (constants.%T.binding.as_type.as.I.impl.F.5ca)] {} {}
// CHECK:STDOUT: %I.impl_witness_table = impl_witness_table (%T.binding.as_type.as.I.impl.F.decl), @T.binding.as_type.as.I.impl [concrete]
// CHECK:STDOUT: %I.impl_witness.loc7_34.1: <witness> = impl_witness %I.impl_witness_table, @T.binding.as_type.as.I.impl(constants.%T.a68) [symbolic = %I.impl_witness.loc7_34.2 (constants.%I.impl_witness.234)]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .F = %T.binding.as_type.as.I.impl.F.decl
// CHECK:STDOUT: witness = %I.impl_witness.loc7_34.1
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.J.impl: %C.ref as %J.ref {
// CHECK:STDOUT: %J.impl_witness_table = impl_witness_table (), @C.as.J.impl [concrete]
// CHECK:STDOUT: %J.impl_witness: <witness> = impl_witness %J.impl_witness_table [concrete = constants.%J.impl_witness]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: witness = %J.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @I.F(@I.%Self: %I.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @T.binding.as_type.as.I.impl.F(@T.binding.as_type.as.I.impl.%T.loc7_20.2: %J.type) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @UseI(%T.loc11_9.2: %I.type) {
// CHECK:STDOUT: %T.loc11_9.1: %I.type = symbolic_binding T, 0 [symbolic = %T.loc11_9.1 (constants.%T.50f)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc11_9.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.419)]
// CHECK:STDOUT: %I.lookup_impl_witness: <witness> = lookup_impl_witness %T.loc11_9.1, @I [symbolic = %I.lookup_impl_witness (constants.%I.lookup_impl_witness)]
// CHECK:STDOUT: %.loc11_19.2: type = fn_type_with_self_type constants.%I.F.type, %T.loc11_9.1 [symbolic = %.loc11_19.2 (constants.%.766)]
// CHECK:STDOUT: %impl.elem0.loc11_19.2: @UseI.%.loc11_19.2 (%.766) = impl_witness_access %I.lookup_impl_witness, element0 [symbolic = %impl.elem0.loc11_19.2 (constants.%impl.elem0)]
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2: <specific function> = specific_impl_function %impl.elem0.loc11_19.2, @I.F(%T.loc11_9.1) [symbolic = %specific_impl_fn.loc11_19.2 (constants.%specific_impl_fn)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %T.ref: %I.type = name_ref T, %T.loc11_9.2 [symbolic = %T.loc11_9.1 (constants.%T.50f)]
// CHECK:STDOUT: %F.ref: %I.assoc_type = name_ref F, @I.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.419)]
// CHECK:STDOUT: %.loc11_19.1: type = converted %T.ref, %T.as_type [symbolic = %T.binding.as_type (constants.%T.binding.as_type.419)]
// CHECK:STDOUT: %impl.elem0.loc11_19.1: @UseI.%.loc11_19.2 (%.766) = impl_witness_access constants.%I.lookup_impl_witness, element0 [symbolic = %impl.elem0.loc11_19.2 (constants.%impl.elem0)]
// CHECK:STDOUT: %specific_impl_fn.loc11_19.1: <specific function> = specific_impl_function %impl.elem0.loc11_19.1, @I.F(constants.%T.50f) [symbolic = %specific_impl_fn.loc11_19.2 (constants.%specific_impl_fn)]
// CHECK:STDOUT: %I.F.call: init %empty_tuple.type = call %specific_impl_fn.loc11_19.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @UseJ(%T.loc12_9.2: %J.type) {
// CHECK:STDOUT: %T.loc12_9.1: %J.type = symbolic_binding T, 0 [symbolic = %T.loc12_9.1 (constants.%T.a68)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc12_9.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type.735)]
// CHECK:STDOUT: %.loc12_24.2: require_specific_def_type = require_specific_def @T.binding.as_type.as.I.impl(%T.loc12_9.1) [symbolic = %.loc12_24.2 (constants.%.5bd)]
// CHECK:STDOUT: %I.impl_witness: <witness> = impl_witness @T.binding.as_type.as.I.impl.%I.impl_witness_table, @T.binding.as_type.as.I.impl(%T.loc12_9.1) [symbolic = %I.impl_witness (constants.%I.impl_witness.234)]
// CHECK:STDOUT: %I.facet.loc12_24.2: %I.type = facet_value %T.binding.as_type, (%I.impl_witness) [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.077)]
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.2: <specific function> = specific_function constants.%UseI, @UseI(%I.facet.loc12_24.2) [symbolic = %UseI.specific_fn.loc12_18.2 (constants.%UseI.specific_fn.8ea)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %UseI.ref: %UseI.type = name_ref UseI, file.%UseI.decl [concrete = constants.%UseI]
// CHECK:STDOUT: %T.ref: %J.type = name_ref T, %T.loc12_9.2 [symbolic = %T.loc12_9.1 (constants.%T.a68)]
// CHECK:STDOUT: %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type.735)]
// CHECK:STDOUT: %I.facet.loc12_24.1: %I.type = facet_value %T.as_type, (constants.%I.impl_witness.234) [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.077)]
// CHECK:STDOUT: %.loc12_24.1: %I.type = converted %T.ref, %I.facet.loc12_24.1 [symbolic = %I.facet.loc12_24.2 (constants.%I.facet.077)]
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.1: <specific function> = specific_function %UseI.ref, @UseI(constants.%I.facet.077) [symbolic = %UseI.specific_fn.loc12_18.2 (constants.%UseI.specific_fn.8ea)]
// CHECK:STDOUT: %UseI.call: init %empty_tuple.type = call %UseI.specific_fn.loc12_18.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %UseJ.ref: %UseJ.type = name_ref UseJ, file.%UseJ.decl [concrete = constants.%UseJ]
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %J.facet: %J.type = facet_value %C.ref, (constants.%J.impl_witness) [concrete = constants.%J.facet]
// CHECK:STDOUT: %.loc16: %J.type = converted %C.ref, %J.facet [concrete = constants.%J.facet]
// CHECK:STDOUT: %UseJ.specific_fn: <specific function> = specific_function %UseJ.ref, @UseJ(constants.%J.facet) [concrete = constants.%UseJ.specific_fn]
// CHECK:STDOUT: %UseJ.call: init %empty_tuple.type = call %UseJ.specific_fn()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%Self.dba) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl(constants.%T.a68) {
// CHECK:STDOUT: %T.loc7_20.1 => constants.%T.a68
// CHECK:STDOUT: %T.binding.as_type => constants.%T.binding.as_type.735
// CHECK:STDOUT: %I.impl_witness.loc7_34.2 => constants.%I.impl_witness.234
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type => constants.%T.binding.as_type.as.I.impl.F.type.746
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F => constants.%T.binding.as_type.as.I.impl.F.5ca
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl.F(constants.%T.a68) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%I.facet.077) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%T.50f) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%T.50f
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%T.50f) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseJ(constants.%T.a68) {
// CHECK:STDOUT: %T.loc12_9.1 => constants.%T.a68
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%I.facet.077) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%I.facet.077
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%T.binding.as_type.735
// CHECK:STDOUT: %I.lookup_impl_witness => constants.%I.impl_witness.234
// CHECK:STDOUT: %.loc11_19.2 => constants.%.fdb
// CHECK:STDOUT: %impl.elem0.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.5ca
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.specific_fn.0af
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseJ(constants.%J.facet) {
// CHECK:STDOUT: %T.loc12_9.1 => constants.%J.facet
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %.loc12_24.2 => constants.%.ac1
// CHECK:STDOUT: %I.impl_witness => constants.%I.impl_witness.3e0
// CHECK:STDOUT: %I.facet.loc12_24.2 => constants.%I.facet.744
// CHECK:STDOUT: %UseI.specific_fn.loc12_18.2 => constants.%UseI.specific_fn.3c7
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl(constants.%J.facet) {
// CHECK:STDOUT: %T.loc7_20.1 => constants.%J.facet
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %I.impl_witness.loc7_34.2 => constants.%I.impl_witness.3e0
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F.type => constants.%T.binding.as_type.as.I.impl.F.type.479
// CHECK:STDOUT: %T.binding.as_type.as.I.impl.F => constants.%T.binding.as_type.as.I.impl.F.bac
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @UseI(constants.%I.facet.744) {
// CHECK:STDOUT: %T.loc11_9.1 => constants.%I.facet.744
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.binding.as_type => constants.%C
// CHECK:STDOUT: %I.lookup_impl_witness => constants.%I.impl_witness.3e0
// CHECK:STDOUT: %.loc11_19.2 => constants.%.1e8
// CHECK:STDOUT: %impl.elem0.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.bac
// CHECK:STDOUT: %specific_impl_fn.loc11_19.2 => constants.%T.binding.as_type.as.I.impl.F.specific_fn.0b8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.F(constants.%I.facet.744) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.binding.as_type.as.I.impl.F(constants.%J.facet) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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