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carbon-lang/toolchain/check/testdata/class/fail_derived_to_base.carbon
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Richard Smith fcabeb6725 Don't create instructions for implicit constants. (#4497) 
When an instruction is created as part of an implicit call to an
interface member, we generated a bunch of constants for naming the
interface, finding the corresponding specific, accessing its member
function, and so on. This led to significant bloat in SemIR.

Instead, we now track whether an instruction is created implicitly in
its location, and where relevant, we use the constant value of the
instruction directly instead of storing a new `Inst`.

This doesn't reduce the amount of work we need to do, but does make the
representation in SemIR smaller and more readable.
2024-11-06 15:44:56 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/class/fail_derived_to_base.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/fail_derived_to_base.carbon
base class A1 {
var a: i32;
}
base class A2 {
var a: i32;
}
class B2 {
extend base: A2;
var b: i32;
}
// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+7]]:38: error: cannot implicitly convert from `B2*` to `A1*` [ImplicitAsConversionFailure]
// CHECK:STDERR: fn ConvertUnrelated(p: B2*) -> A1* { return p; }
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+4]]:38: note: type `B2*` does not implement interface `ImplicitAs` [MissingImplInMemberAccessNote]
// CHECK:STDERR: fn ConvertUnrelated(p: B2*) -> A1* { return p; }
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
fn ConvertUnrelated(p: B2*) -> A1* { return p; }
class Incomplete;
// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+6]]:47: error: cannot implicitly convert from `Incomplete*` to `A2*` [ImplicitAsConversionFailure]
// CHECK:STDERR: fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+3]]:47: note: type `Incomplete*` does not implement interface `ImplicitAs` [MissingImplInMemberAccessNote]
// CHECK:STDERR: fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
// CHECK:STDERR: ^~~~~~~~~
fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
// CHECK:STDOUT: --- fail_derived_to_base.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A1: type = class_type @A1 [template]
// CHECK:STDOUT: %Int32.type: type = fn_type @Int32 [template]
// CHECK:STDOUT: %.1: type = tuple_type () [template]
// CHECK:STDOUT: %Int32: %Int32.type = struct_value () [template]
// CHECK:STDOUT: %.2: type = unbound_element_type %A1, i32 [template]
// CHECK:STDOUT: %.3: type = struct_type {.a: i32} [template]
// CHECK:STDOUT: %.4: <witness> = complete_type_witness %.3 [template]
// CHECK:STDOUT: %A2: type = class_type @A2 [template]
// CHECK:STDOUT: %.5: type = unbound_element_type %A2, i32 [template]
// CHECK:STDOUT: %B2: type = class_type @B2 [template]
// CHECK:STDOUT: %.6: type = ptr_type %.3 [template]
// CHECK:STDOUT: %.7: type = unbound_element_type %B2, %A2 [template]
// CHECK:STDOUT: %.8: type = unbound_element_type %B2, i32 [template]
// CHECK:STDOUT: %.9: type = struct_type {.base: %A2, .b: i32} [template]
// CHECK:STDOUT: %.10: <witness> = complete_type_witness %.9 [template]
// CHECK:STDOUT: %.11: type = ptr_type %B2 [template]
// CHECK:STDOUT: %.12: type = ptr_type %A1 [template]
// CHECK:STDOUT: %ConvertUnrelated.type: type = fn_type @ConvertUnrelated [template]
// CHECK:STDOUT: %ConvertUnrelated: %ConvertUnrelated.type = struct_value () [template]
// CHECK:STDOUT: %.13: type = struct_type {.base: %.6, .b: i32} [template]
// CHECK:STDOUT: %.14: type = ptr_type %.13 [template]
// CHECK:STDOUT: %.15: type = ptr_type %.9 [template]
// CHECK:STDOUT: %ImplicitAs.type.1: type = generic_interface_type @ImplicitAs [template]
// CHECK:STDOUT: %ImplicitAs: %ImplicitAs.type.1 = struct_value () [template]
// CHECK:STDOUT: %Dest: type = bind_symbolic_name Dest, 0 [symbolic]
// CHECK:STDOUT: %ImplicitAs.type.2: type = interface_type @ImplicitAs, @ImplicitAs(%Dest) [symbolic]
// CHECK:STDOUT: %Self.1: @ImplicitAs.%ImplicitAs.type (%ImplicitAs.type.2) = bind_symbolic_name Self, 1 [symbolic]
// CHECK:STDOUT: %Dest.patt: type = symbolic_binding_pattern Dest, 0 [symbolic]
// CHECK:STDOUT: %Self.2: %ImplicitAs.type.2 = bind_symbolic_name Self, 1 [symbolic]
// CHECK:STDOUT: %Convert.type.1: type = fn_type @Convert, @ImplicitAs(%Dest) [symbolic]
// CHECK:STDOUT: %Convert.1: %Convert.type.1 = struct_value () [symbolic]
// CHECK:STDOUT: %.16: type = assoc_entity_type %ImplicitAs.type.2, %Convert.type.1 [symbolic]
// CHECK:STDOUT: %.17: %.16 = assoc_entity element0, imports.%import_ref.6 [symbolic]
// CHECK:STDOUT: %ImplicitAs.type.3: type = interface_type @ImplicitAs, @ImplicitAs(%.12) [template]
// CHECK:STDOUT: %Convert.type.2: type = fn_type @Convert, @ImplicitAs(%.12) [template]
// CHECK:STDOUT: %Convert.2: %Convert.type.2 = struct_value () [template]
// CHECK:STDOUT: %.18: type = assoc_entity_type %ImplicitAs.type.3, %Convert.type.2 [template]
// CHECK:STDOUT: %.19: %.18 = assoc_entity element0, imports.%import_ref.6 [template]
// CHECK:STDOUT: %.20: %.16 = assoc_entity element0, imports.%import_ref.7 [symbolic]
// CHECK:STDOUT: %Incomplete: type = class_type @Incomplete [template]
// CHECK:STDOUT: %.21: type = ptr_type %Incomplete [template]
// CHECK:STDOUT: %.22: type = ptr_type %A2 [template]
// CHECK:STDOUT: %ConvertIncomplete.type: type = fn_type @ConvertIncomplete [template]
// CHECK:STDOUT: %ConvertIncomplete: %ConvertIncomplete.type = struct_value () [template]
// CHECK:STDOUT: %ImplicitAs.type.4: type = interface_type @ImplicitAs, @ImplicitAs(%.22) [template]
// CHECK:STDOUT: %Convert.type.3: type = fn_type @Convert, @ImplicitAs(%.22) [template]
// CHECK:STDOUT: %Convert.3: %Convert.type.3 = struct_value () [template]
// CHECK:STDOUT: %.23: type = assoc_entity_type %ImplicitAs.type.4, %Convert.type.3 [template]
// CHECK:STDOUT: %.24: %.23 = assoc_entity element0, imports.%import_ref.6 [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Int32 = %import_ref.1
// CHECK:STDOUT: .ImplicitAs = %import_ref.2
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %import_ref.1: %Int32.type = import_ref Core//prelude/types, inst+15, loaded [template = constants.%Int32]
// CHECK:STDOUT: %import_ref.2: %ImplicitAs.type.1 = import_ref Core//prelude/operators/as, inst+49, loaded [template = constants.%ImplicitAs]
// CHECK:STDOUT: %import_ref.3 = import_ref Core//prelude/operators/as, inst+55, unloaded
// CHECK:STDOUT: %import_ref.4: @ImplicitAs.%.1 (%.16) = import_ref Core//prelude/operators/as, inst+77, loaded [symbolic = @ImplicitAs.%.2 (constants.%.20)]
// CHECK:STDOUT: %import_ref.5 = import_ref Core//prelude/operators/as, inst+70, unloaded
// CHECK:STDOUT: %import_ref.6 = import_ref Core//prelude/operators/as, inst+70, unloaded
// CHECK:STDOUT: %import_ref.7 = import_ref Core//prelude/operators/as, inst+70, unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .A1 = %A1.decl
// CHECK:STDOUT: .A2 = %A2.decl
// CHECK:STDOUT: .B2 = %B2.decl
// CHECK:STDOUT: .ConvertUnrelated = %ConvertUnrelated.decl
// CHECK:STDOUT: .Incomplete = %Incomplete.decl
// CHECK:STDOUT: .ConvertIncomplete = %ConvertIncomplete.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %A1.decl: type = class_decl @A1 [template = constants.%A1] {} {}
// CHECK:STDOUT: %A2.decl: type = class_decl @A2 [template = constants.%A2] {} {}
// CHECK:STDOUT: %B2.decl: type = class_decl @B2 [template = constants.%B2] {} {}
// CHECK:STDOUT: %ConvertUnrelated.decl: %ConvertUnrelated.type = fn_decl @ConvertUnrelated [template = constants.%ConvertUnrelated] {
// CHECK:STDOUT: %p.patt: %.11 = binding_pattern p
// CHECK:STDOUT: %p.param_patt: %.11 = value_param_pattern %p.patt, runtime_param0
// CHECK:STDOUT: %return.patt: %.12 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %.12 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT: } {
// CHECK:STDOUT: %B2.ref: type = name_ref B2, file.%B2.decl [template = constants.%B2]
// CHECK:STDOUT: %.loc31_26: type = ptr_type %B2 [template = constants.%.11]
// CHECK:STDOUT: %A1.ref: type = name_ref A1, file.%A1.decl [template = constants.%A1]
// CHECK:STDOUT: %.loc31_34: type = ptr_type %A1 [template = constants.%.12]
// CHECK:STDOUT: %p.param: %.11 = value_param runtime_param0
// CHECK:STDOUT: %p: %.11 = bind_name p, %p.param
// CHECK:STDOUT: %return.param: ref %.12 = out_param runtime_param1
// CHECK:STDOUT: %return: ref %.12 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %Incomplete.decl: type = class_decl @Incomplete [template = constants.%Incomplete] {} {}
// CHECK:STDOUT: %ConvertIncomplete.decl: %ConvertIncomplete.type = fn_decl @ConvertIncomplete [template = constants.%ConvertIncomplete] {
// CHECK:STDOUT: %p.patt: %.21 = binding_pattern p
// CHECK:STDOUT: %p.param_patt: %.21 = value_param_pattern %p.patt, runtime_param0
// CHECK:STDOUT: %return.patt: %.22 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %.22 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Incomplete.ref: type = name_ref Incomplete, file.%Incomplete.decl [template = constants.%Incomplete]
// CHECK:STDOUT: %.loc41_35: type = ptr_type %Incomplete [template = constants.%.21]
// CHECK:STDOUT: %A2.ref: type = name_ref A2, file.%A2.decl [template = constants.%A2]
// CHECK:STDOUT: %.loc41_43: type = ptr_type %A2 [template = constants.%.22]
// CHECK:STDOUT: %p.param: %.21 = value_param runtime_param0
// CHECK:STDOUT: %p: %.21 = bind_name p, %p.param
// CHECK:STDOUT: %return.param: ref %.22 = out_param runtime_param1
// CHECK:STDOUT: %return: ref %.22 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic interface @ImplicitAs(constants.%Dest: type) {
// CHECK:STDOUT: %Dest: type = bind_symbolic_name Dest, 0 [symbolic = %Dest (constants.%Dest)]
// CHECK:STDOUT: %Dest.patt: type = symbolic_binding_pattern Dest, 0 [symbolic = %Dest.patt (constants.%Dest.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %ImplicitAs.type: type = interface_type @ImplicitAs, @ImplicitAs(%Dest) [symbolic = %ImplicitAs.type (constants.%ImplicitAs.type.2)]
// CHECK:STDOUT: %Self: %ImplicitAs.type.2 = bind_symbolic_name Self, 1 [symbolic = %Self (constants.%Self.2)]
// CHECK:STDOUT: %Convert.type: type = fn_type @Convert, @ImplicitAs(%Dest) [symbolic = %Convert.type (constants.%Convert.type.1)]
// CHECK:STDOUT: %Convert: @ImplicitAs.%Convert.type (%Convert.type.1) = struct_value () [symbolic = %Convert (constants.%Convert.1)]
// CHECK:STDOUT: %.1: type = assoc_entity_type @ImplicitAs.%ImplicitAs.type (%ImplicitAs.type.2), @ImplicitAs.%Convert.type (%Convert.type.1) [symbolic = %.1 (constants.%.16)]
// CHECK:STDOUT: %.2: @ImplicitAs.%.1 (%.16) = assoc_entity element0, imports.%import_ref.6 [symbolic = %.2 (constants.%.17)]
// CHECK:STDOUT:
// CHECK:STDOUT: interface {
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%import_ref.3
// CHECK:STDOUT: .Convert = imports.%import_ref.4
// CHECK:STDOUT: witness = (imports.%import_ref.5)
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @A1 {
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc12_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc12_10.2: type = converted %int.make_type_32, %.loc12_10.1 [template = i32]
// CHECK:STDOUT: %.loc12_8: %.2 = field_decl a, element0 [template]
// CHECK:STDOUT: %.loc13: <witness> = complete_type_witness %.3 [template = constants.%.4]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%A1
// CHECK:STDOUT: .a = %.loc12_8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @A2 {
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc16_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc16_10.2: type = converted %int.make_type_32, %.loc16_10.1 [template = i32]
// CHECK:STDOUT: %.loc16_8: %.5 = field_decl a, element0 [template]
// CHECK:STDOUT: %.loc17: <witness> = complete_type_witness %.3 [template = constants.%.4]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%A2
// CHECK:STDOUT: .a = %.loc16_8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @B2 {
// CHECK:STDOUT: %A2.ref: type = name_ref A2, file.%A2.decl [template = constants.%A2]
// CHECK:STDOUT: %.loc20: %.7 = base_decl %A2, element0 [template]
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc21_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc21_10.2: type = converted %int.make_type_32, %.loc21_10.1 [template = i32]
// CHECK:STDOUT: %.loc21_8: %.8 = field_decl b, element1 [template]
// CHECK:STDOUT: %.loc22: <witness> = complete_type_witness %.9 [template = constants.%.10]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%B2
// CHECK:STDOUT: .base = %.loc20
// CHECK:STDOUT: .b = %.loc21_8
// CHECK:STDOUT: extend name_scope3
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Incomplete;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Int32() -> type = "int.make_type_32";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @ConvertUnrelated(%p.param_patt: %.11) -> %.12 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %.11 = name_ref p, %p
// CHECK:STDOUT: %.loc31_46: %.12 = converted %p.ref, <error> [template = <error>]
// CHECK:STDOUT: return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Convert(constants.%Dest: type, constants.%Self.1: @ImplicitAs.%ImplicitAs.type (%ImplicitAs.type.2)) {
// CHECK:STDOUT: %Dest: type = bind_symbolic_name Dest, 0 [symbolic = %Dest (constants.%Dest)]
// CHECK:STDOUT: %ImplicitAs.type: type = interface_type @ImplicitAs, @ImplicitAs(%Dest) [symbolic = %ImplicitAs.type (constants.%ImplicitAs.type.2)]
// CHECK:STDOUT: %Self: %ImplicitAs.type.2 = bind_symbolic_name Self, 1 [symbolic = %Self (constants.%Self.2)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn[%self.param_patt: @Convert.%Self (%Self.2)]() -> @Convert.%Dest (%Dest);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @ConvertIncomplete(%p.param_patt: %.21) -> %.22 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %.21 = name_ref p, %p
// CHECK:STDOUT: %.loc41_55: %.22 = converted %p.ref, <error> [template = <error>]
// CHECK:STDOUT: return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ImplicitAs(constants.%Dest) {
// CHECK:STDOUT: %Dest => constants.%Dest
// CHECK:STDOUT: %Dest.patt => constants.%Dest
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ImplicitAs(@ImplicitAs.%Dest) {
// CHECK:STDOUT: %Dest => constants.%Dest
// CHECK:STDOUT: %Dest.patt => constants.%Dest
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ImplicitAs(@Convert.%Dest) {
// CHECK:STDOUT: %Dest => constants.%Dest
// CHECK:STDOUT: %Dest.patt => constants.%Dest
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Convert(constants.%Dest, constants.%Self.1) {
// CHECK:STDOUT: %Dest => constants.%Dest
// CHECK:STDOUT: %ImplicitAs.type => constants.%ImplicitAs.type.2
// CHECK:STDOUT: %Self => constants.%Self.1
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ImplicitAs(constants.%.12) {
// CHECK:STDOUT: %Dest => constants.%.12
// CHECK:STDOUT: %Dest.patt => constants.%.12
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %ImplicitAs.type => constants.%ImplicitAs.type.3
// CHECK:STDOUT: %Self => constants.%Self.2
// CHECK:STDOUT: %Convert.type => constants.%Convert.type.2
// CHECK:STDOUT: %Convert => constants.%Convert.2
// CHECK:STDOUT: %.1 => constants.%.18
// CHECK:STDOUT: %.2 => constants.%.19
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ImplicitAs(constants.%.22) {
// CHECK:STDOUT: %Dest => constants.%.22
// CHECK:STDOUT: %Dest.patt => constants.%.22
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %ImplicitAs.type => constants.%ImplicitAs.type.4
// CHECK:STDOUT: %Self => constants.%Self.2
// CHECK:STDOUT: %Convert.type => constants.%Convert.type.3
// CHECK:STDOUT: %Convert => constants.%Convert.3
// CHECK:STDOUT: %.1 => constants.%.23
// CHECK:STDOUT: %.2 => constants.%.24
// CHECK:STDOUT: }
// CHECK:STDOUT:
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