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carbon-lang/toolchain/check/testdata/interface/import.carbon
T
Geoff Romer 09710d102f Separate binding insts for refs and values (#6235) 
This resolves a TODO in `expr_info.cpp` by using the inst kind rather
than the bound value to track the binding's category.

Since we're churning all the `bind_name` insts in testdata anyway, I'm
also taking this opportunity to align the inst naming with the design's
terminology, by calling these insts "bindings" (this aspect of the PR is
dependent on #6231 resolving an ambiguity in that terminology). For
consistency we'll need to rename several other insts as well (see the
TODO on `RefBinding`); I'm deferring that to a separate PR to minimize
the review load, but I think those name changes are in-scope for this
review.
2025-10-23 01:46:24 +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
// 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/interface/import.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/import.carbon
// --- a.carbon
library "[[@TEST_NAME]]";
interface Empty {
}
interface Basic {
let T:! type;
fn F();
}
// TODO: Implement merging of interface on import.
// interface ForwardDeclared;
interface ForwardDeclared {
let T:! type;
fn F();
}
var f_ref: {.f: ForwardDeclared};
// --- b.carbon
library "[[@TEST_NAME]]";
import library "a";
fn UseEmpty(e: Empty) {}
fn UseBasic(e: Basic) {}
fn UseForwardDeclared(f: ForwardDeclared) {}
alias UseBasicT = Basic.T;
alias UseBasicF = Basic.F;
alias UseForwardDeclaredT = ForwardDeclared.T;
alias UseForwardDeclaredF = ForwardDeclared.F;
var f: ForwardDeclared* = &f_ref.f;
// CHECK:STDOUT: --- a.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Empty.type: type = facet_type <@Empty> [concrete]
// CHECK:STDOUT: %Self.e3a: %Empty.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %Basic.type: type = facet_type <@Basic> [concrete]
// CHECK:STDOUT: %Self.2d9: %Basic.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %Basic.assoc_type: type = assoc_entity_type @Basic [concrete]
// CHECK:STDOUT: %assoc0.0d9: %Basic.assoc_type = assoc_entity element0, @Basic.%T [concrete]
// CHECK:STDOUT: %Basic.F.type: type = fn_type @Basic.F [concrete]
// CHECK:STDOUT: %Basic.F: %Basic.F.type = struct_value () [concrete]
// CHECK:STDOUT: %assoc1.9b4: %Basic.assoc_type = assoc_entity element1, @Basic.%Basic.F.decl [concrete]
// CHECK:STDOUT: %ForwardDeclared.type: type = facet_type <@ForwardDeclared> [concrete]
// CHECK:STDOUT: %Self.dd5: %ForwardDeclared.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %ForwardDeclared.assoc_type: type = assoc_entity_type @ForwardDeclared [concrete]
// CHECK:STDOUT: %assoc0.27c: %ForwardDeclared.assoc_type = assoc_entity element0, @ForwardDeclared.%T [concrete]
// CHECK:STDOUT: %ForwardDeclared.F.type: type = fn_type @ForwardDeclared.F [concrete]
// CHECK:STDOUT: %ForwardDeclared.F: %ForwardDeclared.F.type = struct_value () [concrete]
// CHECK:STDOUT: %assoc1.c80: %ForwardDeclared.assoc_type = assoc_entity element1, @ForwardDeclared.%ForwardDeclared.F.decl [concrete]
// CHECK:STDOUT: %struct_type.f: type = struct_type {.f: %ForwardDeclared.type} [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %struct_type.f [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: .Empty = %Empty.decl
// CHECK:STDOUT: .Basic = %Basic.decl
// CHECK:STDOUT: .ForwardDeclared = %ForwardDeclared.decl
// CHECK:STDOUT: .f_ref = %f_ref
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Empty.decl: type = interface_decl @Empty [concrete = constants.%Empty.type] {} {}
// CHECK:STDOUT: %Basic.decl: type = interface_decl @Basic [concrete = constants.%Basic.type] {} {}
// CHECK:STDOUT: %ForwardDeclared.decl: type = interface_decl @ForwardDeclared [concrete = constants.%ForwardDeclared.type] {} {}
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %f_ref.patt: %pattern_type = ref_binding_pattern f_ref [concrete]
// CHECK:STDOUT: %f_ref.var_patt: %pattern_type = var_pattern %f_ref.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %f_ref.var: ref %struct_type.f = var %f_ref.var_patt [concrete]
// CHECK:STDOUT: %.loc20: type = splice_block %struct_type.f [concrete = constants.%struct_type.f] {
// CHECK:STDOUT: %ForwardDeclared.ref: type = name_ref ForwardDeclared, %ForwardDeclared.decl [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %struct_type.f: type = struct_type {.f: %ForwardDeclared.type} [concrete = constants.%struct_type.f]
// CHECK:STDOUT: }
// CHECK:STDOUT: %f_ref: ref %struct_type.f = ref_binding f_ref, %f_ref.var [concrete = %f_ref.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Empty {
// CHECK:STDOUT: %Self: %Empty.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self.e3a]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Basic {
// CHECK:STDOUT: %Self: %Basic.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self.2d9]
// CHECK:STDOUT: %T: type = assoc_const_decl @T.loc8 [concrete] {
// CHECK:STDOUT: %assoc0: %Basic.assoc_type = assoc_entity element0, @Basic.%T [concrete = constants.%assoc0.0d9]
// CHECK:STDOUT: }
// CHECK:STDOUT: %Basic.F.decl: %Basic.F.type = fn_decl @Basic.F [concrete = constants.%Basic.F] {} {}
// CHECK:STDOUT: %assoc1: %Basic.assoc_type = assoc_entity element1, %Basic.F.decl [concrete = constants.%assoc1.9b4]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .T = @T.loc8.%assoc0
// CHECK:STDOUT: .F = %assoc1
// CHECK:STDOUT: witness = (%T, %Basic.F.decl)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @ForwardDeclared {
// CHECK:STDOUT: %Self: %ForwardDeclared.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self.dd5]
// CHECK:STDOUT: %T: type = assoc_const_decl @T.loc16 [concrete] {
// CHECK:STDOUT: %assoc0: %ForwardDeclared.assoc_type = assoc_entity element0, @ForwardDeclared.%T [concrete = constants.%assoc0.27c]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ForwardDeclared.F.decl: %ForwardDeclared.F.type = fn_decl @ForwardDeclared.F [concrete = constants.%ForwardDeclared.F] {} {}
// CHECK:STDOUT: %assoc1: %ForwardDeclared.assoc_type = assoc_entity element1, %ForwardDeclared.F.decl [concrete = constants.%assoc1.c80]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .T = @T.loc16.%assoc0
// CHECK:STDOUT: .F = %assoc1
// CHECK:STDOUT: witness = (%T, %ForwardDeclared.F.decl)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @T.loc8(@Basic.%Self: %Basic.type) {
// CHECK:STDOUT: assoc_const T:! type;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @T.loc16(@ForwardDeclared.%Self: %ForwardDeclared.type) {
// CHECK:STDOUT: assoc_const T:! type;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Basic.F(@Basic.%Self: %Basic.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @ForwardDeclared.F(@ForwardDeclared.%Self: %ForwardDeclared.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.loc8(constants.%Self.2d9) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Basic.F(constants.%Self.2d9) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.loc16(constants.%Self.dd5) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ForwardDeclared.F(constants.%Self.dd5) {}
// CHECK:STDOUT:
// CHECK:STDOUT: --- b.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Empty.type: type = facet_type <@Empty> [concrete]
// CHECK:STDOUT: %pattern_type.639: type = pattern_type %Empty.type [concrete]
// CHECK:STDOUT: %UseEmpty.type: type = fn_type @UseEmpty [concrete]
// CHECK:STDOUT: %UseEmpty: %UseEmpty.type = struct_value () [concrete]
// CHECK:STDOUT: %Basic.type: type = facet_type <@Basic> [concrete]
// CHECK:STDOUT: %pattern_type.2b6: type = pattern_type %Basic.type [concrete]
// CHECK:STDOUT: %UseBasic.type: type = fn_type @UseBasic [concrete]
// CHECK:STDOUT: %UseBasic: %UseBasic.type = struct_value () [concrete]
// CHECK:STDOUT: %ForwardDeclared.type: type = facet_type <@ForwardDeclared> [concrete]
// CHECK:STDOUT: %pattern_type.71a: type = pattern_type %ForwardDeclared.type [concrete]
// CHECK:STDOUT: %UseForwardDeclared.type: type = fn_type @UseForwardDeclared [concrete]
// CHECK:STDOUT: %UseForwardDeclared: %UseForwardDeclared.type = struct_value () [concrete]
// CHECK:STDOUT: %Basic.assoc_type: type = assoc_entity_type @Basic [concrete]
// CHECK:STDOUT: %assoc0.fee: %Basic.assoc_type = assoc_entity element0, imports.%Main.import_ref.a4a [concrete]
// CHECK:STDOUT: %assoc1.4ea: %Basic.assoc_type = assoc_entity element1, imports.%Main.import_ref.0be [concrete]
// CHECK:STDOUT: %ForwardDeclared.assoc_type: type = assoc_entity_type @ForwardDeclared [concrete]
// CHECK:STDOUT: %assoc0.d40: %ForwardDeclared.assoc_type = assoc_entity element0, imports.%Main.import_ref.69a [concrete]
// CHECK:STDOUT: %assoc1.e3d: %ForwardDeclared.assoc_type = assoc_entity element1, imports.%Main.import_ref.1cc [concrete]
// CHECK:STDOUT: %ptr.f78: type = ptr_type %ForwardDeclared.type [concrete]
// CHECK:STDOUT: %pattern_type.aa9: type = pattern_type %ptr.f78 [concrete]
// CHECK:STDOUT: %struct_type.f: type = struct_type {.f: %ForwardDeclared.type} [concrete]
// CHECK:STDOUT: %pattern_type.1e8: type = pattern_type %struct_type.f [concrete]
// CHECK:STDOUT: %.d5e: ref %ForwardDeclared.type = struct_access imports.%f_ref.var, element0 [concrete]
// CHECK:STDOUT: %addr: %ptr.f78 = addr_of %.d5e [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %Copy.Op.type: type = fn_type @Copy.Op [concrete]
// CHECK:STDOUT: %T.8b3: type = bind_symbolic_name T, 0 [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.31f: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.8b3) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.8a8: %ptr.as.Copy.impl.Op.type.31f = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.d96: <witness> = impl_witness imports.%Copy.impl_witness_table.53c, @ptr.as.Copy.impl(%ForwardDeclared.type) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.cd7: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%ForwardDeclared.type) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.148: %ptr.as.Copy.impl.Op.type.cd7 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %ptr.f78, (%Copy.impl_witness.d96) [concrete]
// CHECK:STDOUT: %.b27: type = fn_type_with_self_type %Copy.Op.type, %Copy.facet [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.bound: <bound method> = bound_method %addr, %ptr.as.Copy.impl.Op.148 [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.148, @ptr.as.Copy.impl.Op(%ForwardDeclared.type) [concrete]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %addr, %ptr.as.Copy.impl.Op.specific_fn [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.Empty: type = import_ref Main//a, Empty, loaded [concrete = constants.%Empty.type]
// CHECK:STDOUT: %Main.Basic: type = import_ref Main//a, Basic, loaded [concrete = constants.%Basic.type]
// CHECK:STDOUT: %Main.ForwardDeclared: type = import_ref Main//a, ForwardDeclared, loaded [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %Main.f_ref: ref %struct_type.f = import_ref Main//a, f_ref, loaded [concrete = %f_ref.var]
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Copy = %Core.Copy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Main.import_ref.96f = import_ref Main//a, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.834 = import_ref Main//a, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.3d5: %Basic.assoc_type = import_ref Main//a, loc8_8, loaded [concrete = constants.%assoc0.fee]
// CHECK:STDOUT: %Main.import_ref.760: %Basic.assoc_type = import_ref Main//a, loc9_9, loaded [concrete = constants.%assoc1.4ea]
// CHECK:STDOUT: %Main.T.44f = import_ref Main//a, T, unloaded
// CHECK:STDOUT: %Main.F.eea = import_ref Main//a, F, unloaded
// CHECK:STDOUT: %Main.import_ref.013 = import_ref Main//a, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.ad1: %ForwardDeclared.assoc_type = import_ref Main//a, loc16_8, loaded [concrete = constants.%assoc0.d40]
// CHECK:STDOUT: %Main.import_ref.339: %ForwardDeclared.assoc_type = import_ref Main//a, loc17_9, loaded [concrete = constants.%assoc1.e3d]
// CHECK:STDOUT: %Main.T.6ee = import_ref Main//a, T, unloaded
// CHECK:STDOUT: %Main.F.5d0 = import_ref Main//a, F, unloaded
// CHECK:STDOUT: %Main.import_ref.a4a = import_ref Main//a, loc8_8, unloaded
// CHECK:STDOUT: %Main.import_ref.0be = import_ref Main//a, loc9_9, unloaded
// CHECK:STDOUT: %Main.import_ref.69a = import_ref Main//a, loc16_8, unloaded
// CHECK:STDOUT: %Main.import_ref.1cc = import_ref Main//a, loc17_9, unloaded
// CHECK:STDOUT: %f_ref.patt: %pattern_type.1e8 = ref_binding_pattern f_ref [concrete]
// CHECK:STDOUT: %f_ref.var_patt: %pattern_type.1e8 = var_pattern %f_ref.patt [concrete]
// CHECK:STDOUT: %f_ref.var: ref %struct_type.f = var %f_ref.var_patt [concrete]
// CHECK:STDOUT: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT: %Core.import_ref.0e4: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.31f) = import_ref Core//prelude/parts/copy, loc{{\d+_\d+}}, loaded [symbolic = @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op (constants.%ptr.as.Copy.impl.Op.8a8)]
// CHECK:STDOUT: %Copy.impl_witness_table.53c = impl_witness_table (%Core.import_ref.0e4), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Empty = imports.%Main.Empty
// CHECK:STDOUT: .Basic = imports.%Main.Basic
// CHECK:STDOUT: .ForwardDeclared = imports.%Main.ForwardDeclared
// CHECK:STDOUT: .f_ref = imports.%Main.f_ref
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .UseEmpty = %UseEmpty.decl
// CHECK:STDOUT: .UseBasic = %UseBasic.decl
// CHECK:STDOUT: .UseForwardDeclared = %UseForwardDeclared.decl
// CHECK:STDOUT: .UseBasicT = %UseBasicT
// CHECK:STDOUT: .UseBasicF = %UseBasicF
// CHECK:STDOUT: .UseForwardDeclaredT = %UseForwardDeclaredT
// CHECK:STDOUT: .UseForwardDeclaredF = %UseForwardDeclaredF
// CHECK:STDOUT: .f = %f
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %default.import = import <none>
// CHECK:STDOUT: %UseEmpty.decl: %UseEmpty.type = fn_decl @UseEmpty [concrete = constants.%UseEmpty] {
// CHECK:STDOUT: %e.patt: %pattern_type.639 = value_binding_pattern e [concrete]
// CHECK:STDOUT: %e.param_patt: %pattern_type.639 = value_param_pattern %e.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %e.param: %Empty.type = value_param call_param0
// CHECK:STDOUT: %Empty.ref: type = name_ref Empty, imports.%Main.Empty [concrete = constants.%Empty.type]
// CHECK:STDOUT: %e: %Empty.type = value_binding e, %e.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %UseBasic.decl: %UseBasic.type = fn_decl @UseBasic [concrete = constants.%UseBasic] {
// CHECK:STDOUT: %e.patt: %pattern_type.2b6 = value_binding_pattern e [concrete]
// CHECK:STDOUT: %e.param_patt: %pattern_type.2b6 = value_param_pattern %e.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %e.param: %Basic.type = value_param call_param0
// CHECK:STDOUT: %Basic.ref: type = name_ref Basic, imports.%Main.Basic [concrete = constants.%Basic.type]
// CHECK:STDOUT: %e: %Basic.type = value_binding e, %e.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %UseForwardDeclared.decl: %UseForwardDeclared.type = fn_decl @UseForwardDeclared [concrete = constants.%UseForwardDeclared] {
// CHECK:STDOUT: %f.patt: %pattern_type.71a = value_binding_pattern f [concrete]
// CHECK:STDOUT: %f.param_patt: %pattern_type.71a = value_param_pattern %f.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %f.param: %ForwardDeclared.type = value_param call_param0
// CHECK:STDOUT: %ForwardDeclared.ref: type = name_ref ForwardDeclared, imports.%Main.ForwardDeclared [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %f: %ForwardDeclared.type = value_binding f, %f.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %Basic.ref.loc10: type = name_ref Basic, imports.%Main.Basic [concrete = constants.%Basic.type]
// CHECK:STDOUT: %T.ref.loc10: %Basic.assoc_type = name_ref T, imports.%Main.import_ref.3d5 [concrete = constants.%assoc0.fee]
// CHECK:STDOUT: %UseBasicT: %Basic.assoc_type = bind_alias UseBasicT, imports.%Main.import_ref.3d5 [concrete = constants.%assoc0.fee]
// CHECK:STDOUT: %Basic.ref.loc11: type = name_ref Basic, imports.%Main.Basic [concrete = constants.%Basic.type]
// CHECK:STDOUT: %F.ref.loc11: %Basic.assoc_type = name_ref F, imports.%Main.import_ref.760 [concrete = constants.%assoc1.4ea]
// CHECK:STDOUT: %UseBasicF: %Basic.assoc_type = bind_alias UseBasicF, imports.%Main.import_ref.760 [concrete = constants.%assoc1.4ea]
// CHECK:STDOUT: %ForwardDeclared.ref.loc13: type = name_ref ForwardDeclared, imports.%Main.ForwardDeclared [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %T.ref.loc13: %ForwardDeclared.assoc_type = name_ref T, imports.%Main.import_ref.ad1 [concrete = constants.%assoc0.d40]
// CHECK:STDOUT: %UseForwardDeclaredT: %ForwardDeclared.assoc_type = bind_alias UseForwardDeclaredT, imports.%Main.import_ref.ad1 [concrete = constants.%assoc0.d40]
// CHECK:STDOUT: %ForwardDeclared.ref.loc14: type = name_ref ForwardDeclared, imports.%Main.ForwardDeclared [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %F.ref.loc14: %ForwardDeclared.assoc_type = name_ref F, imports.%Main.import_ref.339 [concrete = constants.%assoc1.e3d]
// CHECK:STDOUT: %UseForwardDeclaredF: %ForwardDeclared.assoc_type = bind_alias UseForwardDeclaredF, imports.%Main.import_ref.339 [concrete = constants.%assoc1.e3d]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %f.patt: %pattern_type.aa9 = ref_binding_pattern f [concrete]
// CHECK:STDOUT: %f.var_patt: %pattern_type.aa9 = var_pattern %f.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %f.var: ref %ptr.f78 = var %f.var_patt [concrete]
// CHECK:STDOUT: %.loc16: type = splice_block %ptr [concrete = constants.%ptr.f78] {
// CHECK:STDOUT: %ForwardDeclared.ref.loc16: type = name_ref ForwardDeclared, imports.%Main.ForwardDeclared [concrete = constants.%ForwardDeclared.type]
// CHECK:STDOUT: %ptr: type = ptr_type %ForwardDeclared.ref.loc16 [concrete = constants.%ptr.f78]
// CHECK:STDOUT: }
// CHECK:STDOUT: %f: ref %ptr.f78 = ref_binding f, %f.var [concrete = %f.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Empty [from "a.carbon"] {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Main.import_ref.96f
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Basic [from "a.carbon"] {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Main.import_ref.834
// CHECK:STDOUT: .T = imports.%Main.import_ref.3d5
// CHECK:STDOUT: .F = imports.%Main.import_ref.760
// CHECK:STDOUT: witness = (imports.%Main.T.44f, imports.%Main.F.eea)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @ForwardDeclared [from "a.carbon"] {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Main.import_ref.013
// CHECK:STDOUT: .T = imports.%Main.import_ref.ad1
// CHECK:STDOUT: .F = imports.%Main.import_ref.339
// CHECK:STDOUT: witness = (imports.%Main.T.6ee, imports.%Main.F.5d0)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @UseEmpty(%e.param: %Empty.type) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @UseBasic(%e.param: %Basic.type) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @UseForwardDeclared(%f.param: %ForwardDeclared.type) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %f_ref.ref: ref %struct_type.f = name_ref f_ref, imports.%Main.f_ref [concrete = imports.%f_ref.var]
// CHECK:STDOUT: %.loc16: ref %ForwardDeclared.type = struct_access %f_ref.ref, element0 [concrete = constants.%.d5e]
// CHECK:STDOUT: %addr: %ptr.f78 = addr_of %.loc16 [concrete = constants.%addr]
// CHECK:STDOUT: %impl.elem0: %.b27 = impl_witness_access constants.%Copy.impl_witness.d96, element0 [concrete = constants.%ptr.as.Copy.impl.Op.148]
// CHECK:STDOUT: %bound_method.loc16_27.1: <bound method> = bound_method %addr, %impl.elem0 [concrete = constants.%ptr.as.Copy.impl.Op.bound]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%ForwardDeclared.type) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc16_27.2: <bound method> = bound_method %addr, %specific_fn [concrete = constants.%bound_method]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.f78 = call %bound_method.loc16_27.2(%addr) [concrete = constants.%addr]
// CHECK:STDOUT: assign file.%f.var, %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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