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Add Destroy.SubobjectDestroy as a temporary replacement for Destroy.Op (#7773)
This change partially implements [PR #7362], which revises how objects are destroyed. It is a partial implementation for two reasons: 1. This change moves `Destroy.Op`'s current behaviour into `Destroy.SubobjectDestroy`, but it doesn't add support for objects with non-trivial destruction. 2. `Destroy.SubobjectDestroy` is a workaround for `require impls SubobjectDestroy`. We aren't able to use the latter until the dependents add their requirements' implementations to their own witness tables. [PR #7362]: https://github.com/carbon-language/carbon-lang/pulls/7362
This commit is contained in:
Christopher Di Bella
@@ -86,14 +86,14 @@ fn G() {
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// CHECK:STDOUT: %.e77: %.5cd = splice_inst @F.%.loc8_3.27 [template]
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// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
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// CHECK:STDOUT: %Self.0e7: %Destroy.type = symbolic_binding Self, 0 [symbolic]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.type.d3e: type = fn_type @Destroy.WithSelf.Op, @Destroy.WithSelf(%Self.0e7) [symbolic]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.42b: %Destroy.WithSelf.Op.type.d3e = struct_value () [symbolic]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.4e5: type = fn_type @Destroy.WithSelf.SelfDestruct.1, @Destroy.WithSelf(%Self.0e7) [symbolic]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.4a0: %Destroy.WithSelf.SelfDestruct.type.4e5 = struct_value () [symbolic]
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// CHECK:STDOUT: %Destroy.assoc_type: type = assoc_entity_type @Destroy [concrete]
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// CHECK:STDOUT: %assoc0.ae8: %Destroy.assoc_type = assoc_entity element0, imports.%Core.import_ref.918 [concrete]
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// CHECK:STDOUT: %.f94: type = type_of_inst @F.%.loc8_3.29 [template]
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// CHECK:STDOUT: %.457: %.f94 = splice_inst @F.%.loc8_3.29 [template]
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// CHECK:STDOUT: %.98a: type = type_of_inst @F.%.loc8_3.32 [template]
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// CHECK:STDOUT: %.610: %.98a = splice_inst @F.%.loc8_3.32 [template]
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// CHECK:STDOUT: %assoc2: %Destroy.assoc_type = assoc_entity element2, imports.%Core.import_ref.71d [concrete]
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// CHECK:STDOUT: %.f97: type = type_of_inst @F.%.loc8_3.29 [template]
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// CHECK:STDOUT: %.f14: %.f97 = splice_inst @F.%.loc8_3.29 [template]
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// CHECK:STDOUT: %.2c7: type = type_of_inst @F.%.loc8_3.32 [template]
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// CHECK:STDOUT: %.96f: %.2c7 = splice_inst @F.%.loc8_3.32 [template]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
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// CHECK:STDOUT: %X: type = class_type @X [concrete]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
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@@ -111,9 +111,9 @@ fn G() {
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// CHECK:STDOUT: %v.patt.5fa: %pattern_type.981 = ref_binding_pattern v [concrete]
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// CHECK:STDOUT: %v.var_patt.e69: %pattern_type.981 = var_pattern %v.patt.5fa [concrete]
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// CHECK:STDOUT: %.e53: require_specific_def_type = require_specific_def @T.as.DefaultOrUnformed.impl(%S) [concrete]
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// CHECK:STDOUT: %S.Op.type.83af6e.1: type = fn_type @S.Op.1 [concrete]
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// CHECK:STDOUT: %S.Op.4dca31.1: %S.Op.type.83af6e.1 = struct_value () [concrete]
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// CHECK:STDOUT: %custom_witness.9b4: <witness> = custom_witness (%S.Op.4dca31.1), @Default [concrete]
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// CHECK:STDOUT: %S.Op.type: type = fn_type @S.Op [concrete]
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// CHECK:STDOUT: %S.Op: %S.Op.type = struct_value () [concrete]
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// CHECK:STDOUT: %custom_witness.9b4: <witness> = custom_witness (%S.Op), @Default [concrete]
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// CHECK:STDOUT: %Default.facet.602: %Default.type = facet_value %S, (%custom_witness.9b4) [concrete]
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// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.1ff: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.162, @T.as_type.as.DefaultOrUnformed.impl(%Default.facet.602) [concrete]
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// CHECK:STDOUT: %T.as_type.as.DefaultOrUnformed.impl.Op.type.c7b: type = fn_type @T.as_type.as.DefaultOrUnformed.impl.Op, @T.as_type.as.DefaultOrUnformed.impl(%Default.facet.602) [concrete]
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@@ -127,7 +127,7 @@ fn G() {
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// CHECK:STDOUT: %.64e: %.805 = splice_block %impl.elem0.9ae [concrete = %T.as_type.as.DefaultOrUnformed.impl.Op.83d] {
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// CHECK:STDOUT: %as_type: type = facet_access_type %DefaultOrUnformed.facet.ba3 [concrete = %S]
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// CHECK:STDOUT: %.bcb: type = converted %DefaultOrUnformed.facet.ba3, %as_type [concrete = %S]
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// CHECK:STDOUT: %Op.ref.f8c: %DefaultOrUnformed.assoc_type = name_ref Op, imports.%Core.import_ref.6dc [concrete = %assoc0.b81]
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// CHECK:STDOUT: %Op.ref: %DefaultOrUnformed.assoc_type = name_ref Op, imports.%Core.import_ref.6dc [concrete = %assoc0.b81]
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// CHECK:STDOUT: %impl.elem0.9ae: %.805 = impl_witness_access %DefaultOrUnformed.impl_witness.1ff, element0 [concrete = %T.as_type.as.DefaultOrUnformed.impl.Op.83d]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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@@ -152,28 +152,30 @@ fn G() {
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// CHECK:STDOUT: %.a03: %.94b = splice_inst %.9a4 [template]
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// CHECK:STDOUT: %.169: <instruction> = convert_to_category_action %.a03, element10 [template]
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// CHECK:STDOUT: %.217: %S = splice_inst %.169 [template]
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// CHECK:STDOUT: %self.param_patt.471: %pattern_type.981 = ref_param_pattern [concrete]
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// CHECK:STDOUT: %self.patt.5f0: %pattern_type.981 = wrapper_binding_pattern self, %self.param_patt.471 [concrete]
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// CHECK:STDOUT: %S.cpp_destructor.type: type = fn_type @S.cpp_destructor [concrete]
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// CHECK:STDOUT: %S.cpp_destructor: %S.cpp_destructor.type = struct_value () [concrete]
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// CHECK:STDOUT: %S.Op.type.83af6e.2: type = fn_type @S.Op.2 [concrete]
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// CHECK:STDOUT: %S.Op.4dca31.2: %S.Op.type.83af6e.2 = struct_value () [concrete]
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// CHECK:STDOUT: %custom_witness.e7a31c.2: <witness> = custom_witness (%S.Op.4dca31.2), @Destroy [concrete]
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// CHECK:STDOUT: %Destroy.facet.2e5: %Destroy.type = facet_value %S, (%custom_witness.e7a31c.2) [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.type.5df: type = fn_type @Destroy.WithSelf.Op, @Destroy.WithSelf(%Destroy.facet.2e5) [concrete]
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// CHECK:STDOUT: %.670: type = fn_type_with_self_type %Destroy.WithSelf.Op.type.5df, %Destroy.facet.2e5 [concrete]
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// CHECK:STDOUT: %inst.splice_block.b32: <instruction> = inst_value [concrete] {
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// CHECK:STDOUT: %.ef5: <bound method> = splice_block %bound_method {
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// CHECK:STDOUT: %Destroy.WithSelf.Op.type.ef016f.2: type = fn_type @Destroy.WithSelf.Op.loc8 [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.403171.2: %Destroy.WithSelf.Op.type.ef016f.2 = struct_value () [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.fbceb5.2: type = fn_type @Destroy.WithSelf.SelfDestruct.loc8 [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.db3fdb.2: %Destroy.WithSelf.SelfDestruct.type.fbceb5.2 = struct_value () [concrete]
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// CHECK:STDOUT: %S.SubobjectDestroy.type: type = fn_type @S.SubobjectDestroy [concrete]
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// CHECK:STDOUT: %S.SubobjectDestroy: %S.SubobjectDestroy.type = struct_value () [concrete]
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// CHECK:STDOUT: %custom_witness.1bfa2a.2: <witness> = custom_witness (%Destroy.WithSelf.Op.403171.2, %S.SubobjectDestroy, %Destroy.WithSelf.SelfDestruct.db3fdb.2), @Destroy [concrete]
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// CHECK:STDOUT: %Destroy.facet.edc: %Destroy.type = facet_value %S, (%custom_witness.1bfa2a.2) [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.e44: type = fn_type @Destroy.WithSelf.SelfDestruct.1, @Destroy.WithSelf(%Destroy.facet.edc) [concrete]
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// CHECK:STDOUT: %.bb1: type = fn_type_with_self_type %Destroy.WithSelf.SelfDestruct.type.e44, %Destroy.facet.edc [concrete]
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// CHECK:STDOUT: %inst.splice_block.80a: <instruction> = inst_value [concrete] {
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// CHECK:STDOUT: %.c7f: <bound method> = splice_block %bound_method {
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// CHECK:STDOUT: %.e7d: ref %S = specific_inst @F.%v.var, @F(%X)
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %impl.elem0.c3e: %.670 = impl_witness_access %custom_witness.e7a31c.2, element0 [concrete = %S.Op.4dca31.2]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %.e7d, %impl.elem0.c3e
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// CHECK:STDOUT: %impl.elem2: %.bb1 = impl_witness_access %custom_witness.1bfa2a.2, element2 [concrete = %Destroy.WithSelf.SelfDestruct.db3fdb.2]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %.e7d, %impl.elem2
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %inst.splice_block.5c0: <instruction> = inst_value [concrete] {
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// CHECK:STDOUT: %.052: init %empty_tuple.type = splice_block %S.cpp_destructor.call {
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// CHECK:STDOUT: %Op.ref.6a0: %S.cpp_destructor.type = name_ref Op, imports.%S.cpp_destructor.decl [concrete = %S.cpp_destructor]
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// CHECK:STDOUT: %S.cpp_destructor.bound: <bound method> = bound_method %.e7d, %Op.ref.6a0
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// CHECK:STDOUT: %S.cpp_destructor.call: init %empty_tuple.type = call %S.cpp_destructor.bound(%.e7d)
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %inst.call: <instruction> = inst_value [concrete] {
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.call: init %empty_tuple.type = call %.c7f(%.e7d)
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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@@ -187,7 +189,7 @@ fn G() {
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// CHECK:STDOUT: %Core.import_ref.6dc: %DefaultOrUnformed.assoc_type = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [concrete = constants.%assoc0.b81]
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// CHECK:STDOUT: %Core.import_ref.c2f: @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op.type (%T.as_type.as.DefaultOrUnformed.impl.Op.type.0c9) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @T.as_type.as.DefaultOrUnformed.impl.%T.as_type.as.DefaultOrUnformed.impl.Op (constants.%T.as_type.as.DefaultOrUnformed.impl.Op.cfe)]
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// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table.162 = impl_witness_table (%Core.import_ref.c2f), @T.as_type.as.DefaultOrUnformed.impl [concrete]
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// CHECK:STDOUT: %Core.import_ref.918: @Destroy.WithSelf.%Destroy.WithSelf.Op.type (%Destroy.WithSelf.Op.type.d3e) = import_ref Core//prelude/parts/destroy, loc{{\d+_\d+}}, loaded [symbolic = @Destroy.WithSelf.%Destroy.WithSelf.Op (constants.%Destroy.WithSelf.Op.42b)]
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// CHECK:STDOUT: %Core.import_ref.71d: @Destroy.WithSelf.%Destroy.WithSelf.SelfDestruct.type (%Destroy.WithSelf.SelfDestruct.type.4e5) = import_ref Core//prelude/parts/destroy, loc{{\d+_\d+}}, loaded [symbolic = @Destroy.WithSelf.%Destroy.WithSelf.SelfDestruct (constants.%Destroy.WithSelf.SelfDestruct.4a0)]
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// CHECK:STDOUT: %X.decl: type = class_decl @X [concrete = constants.%X] {} {}
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// CHECK:STDOUT: %S.decl: type = class_decl @S [concrete = constants.%S] {} {}
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// CHECK:STDOUT: %Core.import_ref.d14: @DefaultOrUnformed.WithSelf.%DefaultOrUnformed.WithSelf.Op.type (%DefaultOrUnformed.WithSelf.Op.type.8f1) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @DefaultOrUnformed.WithSelf.%DefaultOrUnformed.WithSelf.Op (constants.%DefaultOrUnformed.WithSelf.Op.ad7)]
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@@ -198,6 +200,16 @@ fn G() {
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: generated {
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// CHECK:STDOUT: %Destroy.WithSelf.Op.decl.5f94cf.2: %Destroy.WithSelf.Op.type.ef016f.2 = fn_decl @Destroy.WithSelf.Op.loc8 [concrete = constants.%Destroy.WithSelf.Op.403171.2] {
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// CHECK:STDOUT: %self.param_patt: %pattern_type.981 = ref_param_pattern [concrete = constants.%self.param_patt.471]
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// CHECK:STDOUT: %self.patt: %pattern_type.981 = wrapper_binding_pattern self, %self.param_patt [concrete = constants.%self.patt.5f0]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %self.param: ref %S = ref_param call_param0
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// CHECK:STDOUT: %self: ref %S = wrapper_binding self, %self.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
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// CHECK:STDOUT: %T.patt.loc7_7.1: %pattern_type.9a5 = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc7_7.2 (constants.%T.patt.3a0)]
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@@ -257,12 +269,12 @@ fn G() {
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// CHECK:STDOUT: %.loc8_3.26: @F.%.loc8_3.25 (%.9f0) = splice_inst %.loc8_3.24 [template = %.loc8_3.26 (constants.%.0f3)]
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// CHECK:STDOUT: %.loc8_3.27: <instruction> = convert_to_category_action %.loc8_3.9, element10 [template]
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// CHECK:STDOUT: %.loc8_3.28: @F.%.loc8_24.9 (%.5cd) = splice_inst %.loc8_3.27 [template = %.loc8_3.28 (constants.%.e77)]
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// CHECK:STDOUT: %.loc8_3.29: <instruction> = compound_member_access_action %v.var, constants.%assoc0.ae8 [template]
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// CHECK:STDOUT: %.loc8_3.30: type = type_of_inst %.loc8_3.29 [template = %.loc8_3.30 (constants.%.f94)]
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// CHECK:STDOUT: %.loc8_3.31: @F.%.loc8_3.30 (%.f94) = splice_inst %.loc8_3.29 [template = %.loc8_3.31 (constants.%.457)]
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// CHECK:STDOUT: %.loc8_3.29: <instruction> = compound_member_access_action %v.var, constants.%assoc2 [template]
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// CHECK:STDOUT: %.loc8_3.30: type = type_of_inst %.loc8_3.29 [template = %.loc8_3.30 (constants.%.f97)]
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// CHECK:STDOUT: %.loc8_3.31: @F.%.loc8_3.30 (%.f97) = splice_inst %.loc8_3.29 [template = %.loc8_3.31 (constants.%.f14)]
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// CHECK:STDOUT: %.loc8_3.32: <instruction> = call_action (%.loc8_3.12), true [template]
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// CHECK:STDOUT: %.loc8_3.33: type = type_of_inst %.loc8_3.32 [template = %.loc8_3.33 (constants.%.98a)]
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// CHECK:STDOUT: %.loc8_3.34: @F.%.loc8_3.33 (%.98a) = splice_inst %.loc8_3.32 [template = %.loc8_3.34 (constants.%.610)]
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// CHECK:STDOUT: %.loc8_3.33: type = type_of_inst %.loc8_3.32 [template = %.loc8_3.33 (constants.%.2c7)]
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// CHECK:STDOUT: %.loc8_3.34: @F.%.loc8_3.33 (%.2c7) = splice_inst %.loc8_3.32 [template = %.loc8_3.34 (constants.%.96f)]
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn(%x.param: @F.%T.loc7_7.1 (%T.67d)) {
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// CHECK:STDOUT: !entry:
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@@ -298,14 +310,23 @@ fn G() {
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// CHECK:STDOUT: %v.patt.loc8_15.1: @F.%pattern_type.loc8 (%pattern_type.a1f) = ref_binding_pattern v [template = %v.patt.loc8_15.2 (constants.%v.patt.019)]
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// CHECK:STDOUT: %v.var_patt.loc8_3.1: @F.%pattern_type.loc8 (%pattern_type.a1f) = var_pattern %v.patt.loc8_15.1 [template = %v.var_patt.loc8_3.2 (constants.%v.var_patt.d78)]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc8_3.11: type = type_of_inst %.loc8_3.29 [template = %.loc8_3.30 (constants.%.f94)]
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// CHECK:STDOUT: %.loc8_3.12: @F.%.loc8_3.30 (%.f94) = splice_inst %.loc8_3.29 [template = %.loc8_3.31 (constants.%.457)]
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// CHECK:STDOUT: %.loc8_3.13: type = type_of_inst %.loc8_3.32 [template = %.loc8_3.33 (constants.%.98a)]
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// CHECK:STDOUT: %.loc8_3.14: @F.%.loc8_3.33 (%.98a) = splice_inst %.loc8_3.32 [template = %.loc8_3.34 (constants.%.610)]
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// CHECK:STDOUT: %.loc8_3.11: type = type_of_inst %.loc8_3.29 [template = %.loc8_3.30 (constants.%.f97)]
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// CHECK:STDOUT: %.loc8_3.12: @F.%.loc8_3.30 (%.f97) = splice_inst %.loc8_3.29 [template = %.loc8_3.31 (constants.%.f14)]
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// CHECK:STDOUT: %.loc8_3.13: type = type_of_inst %.loc8_3.32 [template = %.loc8_3.33 (constants.%.2c7)]
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// CHECK:STDOUT: %.loc8_3.14: @F.%.loc8_3.33 (%.2c7) = splice_inst %.loc8_3.32 [template = %.loc8_3.34 (constants.%.96f)]
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Destroy.WithSelf.Op.loc8(%self.param: ref %S) = "no_op";
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Destroy.WithSelf.SelfDestruct.loc8(%self.param: ref %S) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %Destroy.WithSelf.Op.call: init %empty_tuple.type = call generated.%Destroy.WithSelf.Op.decl.5f94cf.2(%self.param)
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// CHECK:STDOUT: %S.cpp_destructor.call: init %empty_tuple.type = call imports.%S.cpp_destructor.decl(%self.param)
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @F(constants.%T.67d) {
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// CHECK:STDOUT: %T.patt.loc7_7.2 => constants.%T.patt.3a0
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// CHECK:STDOUT: %T.loc7_7.1 => constants.%T.67d
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@@ -356,10 +377,10 @@ fn G() {
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// CHECK:STDOUT: %.loc8_3.26 => constants.%.a03
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// CHECK:STDOUT: %.loc8_3.27 => constants.%.169
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// CHECK:STDOUT: %.loc8_3.28 => constants.%.217
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// CHECK:STDOUT: %.loc8_3.29 => constants.%inst.splice_block.b32
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// CHECK:STDOUT: %.loc8_3.29 => constants.%inst.splice_block.80a
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// CHECK:STDOUT: %.loc8_3.30 => <bound method>
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// CHECK:STDOUT: %.loc8_3.31 => invalid
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// CHECK:STDOUT: %.loc8_3.32 => constants.%inst.splice_block.5c0
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// CHECK:STDOUT: %.loc8_3.32 => constants.%inst.call
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// CHECK:STDOUT: %.loc8_3.33 => constants.%empty_tuple.type
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// CHECK:STDOUT: %.loc8_3.34 => invalid
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// CHECK:STDOUT: }
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