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carbon-lang/toolchain/check/testdata/function/generic/import_specific.carbon
T
fdb188ccfd Implement unused pattern bindings, continued (#6518)
Implementation of unused pattern bindings #2022, continued.

Whereas previous PR #6460 took care of parsing, and PR #6479 prepared
the stage by using _ in some test cases, this PR has the the actual
implementation, using a simple dataflow analysis.

---------

Co-authored-by: Burak Emir <bqe@google.com>
Co-authored-by: jonmeow <jperkins@google.com>
2026-02-19 23:33:36 +00:00

221 lines
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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
// 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/function/generic/import_specific.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/generic/import_specific.carbon
// --- library.carbon
library "[[@TEST_NAME]]";
fn F(unused T:! type) {
}
fn G(T:! type) {
F(T);
}
// --- user.carbon
library "[[@TEST_NAME]]";
import library "library";
class C {}
fn H() {
// TODO: We currently crash when importing G if we don't force F to be imported first.
F(C);
G(C);
}
// CHECK:STDOUT: --- library.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %T.67db0b.1: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type: type = pattern_type type [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %T.67db0b.2: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %F.specific_fn: <specific function> = specific_function %F, @F(%T.67db0b.2) [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %T.patt: %pattern_type = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %T.loc4_13.2: type = symbolic_binding T, 0 [symbolic = %T.loc4_13.1 (constants.%T.67db0b.1)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %T.patt: %pattern_type = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %T.loc7_6.2: type = symbolic_binding T, 0 [symbolic = %T.loc7_6.1 (constants.%T.67db0b.2)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F(%T.loc4_13.2: type) {
// CHECK:STDOUT: %T.loc4_13.1: type = symbolic_binding T, 0 [symbolic = %T.loc4_13.1 (constants.%T.67db0b.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.loc7_6.2: type) {
// CHECK:STDOUT: %T.loc7_6.1: type = symbolic_binding T, 0 [symbolic = %T.loc7_6.1 (constants.%T.67db0b.2)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %F.specific_fn.loc8_3.2: <specific function> = specific_function constants.%F, @F(%T.loc7_6.1) [symbolic = %F.specific_fn.loc8_3.2 (constants.%F.specific_fn)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc7_6.2 [symbolic = %T.loc7_6.1 (constants.%T.67db0b.2)]
// CHECK:STDOUT: %F.specific_fn.loc8_3.1: <specific function> = specific_function %F.ref, @F(constants.%T.67db0b.2) [symbolic = %F.specific_fn.loc8_3.2 (constants.%F.specific_fn)]
// CHECK:STDOUT: %F.call: init %empty_tuple.type = call %F.specific_fn.loc8_3.1()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.67db0b.1) {
// CHECK:STDOUT: %T.loc4_13.1 => constants.%T.67db0b.1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%T.67db0b.2) {
// CHECK:STDOUT: %T.loc7_6.1 => constants.%T.67db0b.2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.67db0b.2) {
// CHECK:STDOUT: %T.loc4_13.1 => constants.%T.67db0b.2
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- user.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// 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: %H.type: type = fn_type @H [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %H: %H.type = struct_value () [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %T.67db0b.1: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %F.specific_fn.540: <specific function> = specific_function %F, @F(%C) [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %T.67db0b.2: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %F.specific_fn.643: <specific function> = specific_function %F, @F(%T.67db0b.2) [symbolic]
// CHECK:STDOUT: %G.specific_fn: <specific function> = specific_function %G, @G(%C) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.F: %F.type = import_ref Main//library, F, loaded [concrete = constants.%F]
// CHECK:STDOUT: %Main.G: %G.type = import_ref Main//library, G, loaded [concrete = constants.%G]
// CHECK:STDOUT: %Main.import_ref.b3bc94.1: type = import_ref Main//library, loc4_13, loaded [symbolic = @F.%T (constants.%T.67db0b.1)]
// CHECK:STDOUT: %Main.import_ref.b3bc94.2: type = import_ref Main//library, loc7_6, loaded [symbolic = @G.%T (constants.%T.67db0b.2)]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .F = imports.%Main.F
// CHECK:STDOUT: .G = imports.%Main.G
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .H = %H.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %default.import = import <none>
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %H.decl: %H.type = fn_decl @H [concrete = constants.%H] {} {}
// 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: fn @H() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %F.ref: %F.type = name_ref F, imports.%Main.F [concrete = constants.%F]
// CHECK:STDOUT: %C.ref.loc10: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %F.specific_fn: <specific function> = specific_function %F.ref, @F(constants.%C) [concrete = constants.%F.specific_fn.540]
// CHECK:STDOUT: %F.call: init %empty_tuple.type = call %F.specific_fn()
// CHECK:STDOUT: %G.ref: %G.type = name_ref G, imports.%Main.G [concrete = constants.%G]
// CHECK:STDOUT: %C.ref.loc12: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %G.specific_fn: <specific function> = specific_function %G.ref, @G(constants.%C) [concrete = constants.%G.specific_fn]
// CHECK:STDOUT: %G.call: init %empty_tuple.type = call %G.specific_fn()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F(imports.%Main.import_ref.b3bc94.1: type) [from "library.carbon"] {
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic = %T (constants.%T.67db0b.1)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(imports.%Main.import_ref.b3bc94.2: type) [from "library.carbon"] {
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic = %T (constants.%T.67db0b.2)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %F.specific_fn: <specific function> = specific_function constants.%F, @F(%T) [symbolic = %F.specific_fn (constants.%F.specific_fn.643)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.67db0b.1) {
// CHECK:STDOUT: %T => constants.%T.67db0b.1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%C) {
// CHECK:STDOUT: %T => constants.%C
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T.67db0b.2) {
// CHECK:STDOUT: %T => constants.%T.67db0b.2
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%T.67db0b.2) {
// CHECK:STDOUT: %T => constants.%T.67db0b.2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%C) {
// CHECK:STDOUT: %T => constants.%C
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %F.specific_fn => constants.%F.specific_fn.540
// CHECK:STDOUT: }
// CHECK:STDOUT: