carbon-language/carbon-lang
1
0
Fork 0
mirror of https://github.com/carbon-language/carbon-lang.git synced 2026-09-24 21:10:12 +01:00
Code Issues Packages Projects Releases 10 Wiki Activity
Files
d60900cbeb71717fcfaa68b298d753ecc7e9b9dc
carbon-lang/toolchain/check/testdata/class/forward_declared.carbon
T
Richard Smith d60900cbeb Remove special case for returning value expressions by copy (#6052) 
When returning a value from a function whose return type has a by-copy
initializing representation, perform initialization like we do when the
return type has an in-place initializing representation. This makes our
SemIR representation more uniform, as the return expression will now
always be an initializing expression rather than a value expression, but
more importantly it means that attempts to return a non-copyable type by
value now fail, even if the type has a by-copy initializing
representation.

This catches a bunch of places where we were returning a value of an
unconstrained template parameter `T:! type`, which we were incorrectly
allowing because we didn't notice it was not copyable. Unfortunately
this then requires quite a few test updates.

Like #6034, this exposes a lowering issue where lowering crashes when
attempting to lower a specific copy operation for certain types; a
couple more tests are temporarily disabled here. An upcoming PR
dependent on this one will fix the issue and re-enable those tests.
2025-09-12 00:13:33 +00:00

91 lines
5.7 KiB
Plaintext
Raw Blame History

// 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/class/forward_declared.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/forward_declared.carbon
class Class;
fn F(p: Class*) -> Class* { return p; }
// CHECK:STDOUT: --- forward_declared.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Class: type = class_type @Class [concrete]
// CHECK:STDOUT: %ptr.e71: type = ptr_type %Class [concrete]
// CHECK:STDOUT: %pattern_type.796: type = pattern_type %ptr.e71 [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [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.f23: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.8b3) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.abf: %ptr.as.Copy.impl.Op.type.f23 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.771: <witness> = impl_witness imports.%Copy.impl_witness_table.a71, @ptr.as.Copy.impl(%Class) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.eef: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%Class) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.cd0: %ptr.as.Copy.impl.Op.type.eef = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.054: %Copy.type = facet_value %ptr.e71, (%Copy.impl_witness.771) [concrete]
// CHECK:STDOUT: %.96e: type = fn_type_with_self_type %Copy.Op.type, %Copy.facet.054 [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.cd0, @ptr.as.Copy.impl.Op(%Class) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// 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: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT: %Core.import_ref.de9: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.f23) = import_ref Core//prelude/parts/copy, loc36_31, loaded [symbolic = @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op (constants.%ptr.as.Copy.impl.Op.abf)]
// CHECK:STDOUT: %Copy.impl_witness_table.a71 = impl_witness_table (%Core.import_ref.de9), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Class = %Class.decl
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Class.decl: type = class_decl @Class [concrete = constants.%Class] {} {}
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %p.patt: %pattern_type.796 = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type.796 = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.796 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.796 = out_param_pattern %return.patt, call_param1 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Class.ref.loc17_20: type = name_ref Class, file.%Class.decl [concrete = constants.%Class]
// CHECK:STDOUT: %ptr.loc17_25: type = ptr_type %Class.ref.loc17_20 [concrete = constants.%ptr.e71]
// CHECK:STDOUT: %p.param: %ptr.e71 = value_param call_param0
// CHECK:STDOUT: %.loc17: type = splice_block %ptr.loc17_14 [concrete = constants.%ptr.e71] {
// CHECK:STDOUT: %Class.ref.loc17_9: type = name_ref Class, file.%Class.decl [concrete = constants.%Class]
// CHECK:STDOUT: %ptr.loc17_14: type = ptr_type %Class.ref.loc17_9 [concrete = constants.%ptr.e71]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %ptr.e71 = bind_name p, %p.param
// CHECK:STDOUT: %return.param: ref %ptr.e71 = out_param call_param1
// CHECK:STDOUT: %return: ref %ptr.e71 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Class;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%p.param: %ptr.e71) -> %ptr.e71 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %ptr.e71 = name_ref p, %p
// CHECK:STDOUT: %impl.elem0: %.96e = impl_witness_access constants.%Copy.impl_witness.771, element0 [concrete = constants.%ptr.as.Copy.impl.Op.cd0]
// CHECK:STDOUT: %bound_method.loc17_36.1: <bound method> = bound_method %p.ref, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%Class) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc17_36.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.e71 = call %bound_method.loc17_36.2(%p.ref)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
Reference in New Issue View Git Blame Copy Permalink