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https://github.com/carbon-language/carbon-lang.git
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Richard SmithandGeoff Romer
1ec8ac7ef9
Instead of hardcoding which types are copyable, add a `Core.Copy` interface to perform copying. Move almost all the current copy support to that interface. Some remaining pieces are still using builtin logic after this PR: * For tuples and structs, builtin logic is used to perform elementwise copies. This also supports copying *adapters of* tuples and structs, which seems like it may not be desirable, especially for non-extending adapters. A `Copy` impl is provided for tuples of at most 2 elements, so that `Core.Copy` constraints are satisfied, but we can't implement this generally until we have variadics support, and don't yet have a mechanism to generalize this to structs. * For `enum` types imported from C++, builtin logic is used to perform a copy. This is temporary until we have a mechanism to identify these types from an impl in the prelude. One lowering test in `toolchain/lower/testdata/class/generic.carbon` is disabled for now, as it causes a crash in the lowering code due to an ABI mismatch between the call signature in the lowered declaration of a specific function and the call that is generated in the specific callee. Fixing this is a little involved, and will be done in a separate PR. --------- Co-authored-by: Geoff Romer <gromer@google.com>
103 lines
5.4 KiB
Plaintext
103 lines
5.4 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/enum/copy.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/enum/copy.carbon
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// --- enum.h
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enum Enum : short { a, b, c };
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// --- copy_enum.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "enum.h";
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//@dump-sem-ir-begin
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fn F() {
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var a: Cpp.Enum = Cpp.Enum.a;
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a = Cpp.Enum.b;
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}
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//@dump-sem-ir-end
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// CHECK:STDOUT: --- copy_enum.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
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// CHECK:STDOUT: %Enum: type = class_type @Enum [concrete]
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// CHECK:STDOUT: %pattern_type.ebf: type = pattern_type %Enum [concrete]
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// CHECK:STDOUT: %int_0: %Enum = int_value 0 [concrete]
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// CHECK:STDOUT: %int_1: %Enum = int_value 1 [concrete]
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.type.664: type = fn_type @T.as.Destroy.impl.Op, @T.as.Destroy.impl(%Enum) [concrete]
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.bbe: %T.as.Destroy.impl.Op.type.664 = struct_value () [concrete]
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// CHECK:STDOUT: %ptr.47b: type = ptr_type %Enum [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
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// CHECK:STDOUT: .Enum = %Enum.decl
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Enum.decl: type = class_decl @Enum [concrete = constants.%Enum] {} {}
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// CHECK:STDOUT: %int_0: %Enum = int_value 0 [concrete = constants.%int_0]
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// CHECK:STDOUT: %int_1: %Enum = int_value 1 [concrete = constants.%int_1]
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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: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %a.patt: %pattern_type.ebf = binding_pattern a [concrete]
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// CHECK:STDOUT: %a.var_patt: %pattern_type.ebf = var_pattern %a.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a.var: ref %Enum = var %a.var_patt
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// CHECK:STDOUT: %Cpp.ref.loc8_21: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %Enum.ref.loc8_24: type = name_ref Enum, imports.%Enum.decl [concrete = constants.%Enum]
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// CHECK:STDOUT: %a.ref.loc8: %Enum = name_ref a, imports.%int_0 [concrete = constants.%int_0]
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// CHECK:STDOUT: %.loc8_29.1: ref %Enum = temporary_storage
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// CHECK:STDOUT: %.loc8_29.2: ref %Enum = temporary %.loc8_29.1, %a.ref.loc8
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// CHECK:STDOUT: assign %a.var, %.loc8_29.2
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// CHECK:STDOUT: %.loc8_13: type = splice_block %Enum.ref.loc8_13 [concrete = constants.%Enum] {
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// CHECK:STDOUT: %Cpp.ref.loc8_10: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %Enum.ref.loc8_13: type = name_ref Enum, imports.%Enum.decl [concrete = constants.%Enum]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a: ref %Enum = bind_name a, %a.var
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// CHECK:STDOUT: %a.ref.loc10: ref %Enum = name_ref a, %a
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// CHECK:STDOUT: %Cpp.ref.loc10: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %Enum.ref.loc10: type = name_ref Enum, imports.%Enum.decl [concrete = constants.%Enum]
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// CHECK:STDOUT: %b.ref: %Enum = name_ref b, imports.%int_1 [concrete = constants.%int_1]
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// CHECK:STDOUT: %.loc10_15.1: ref %Enum = temporary_storage
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// CHECK:STDOUT: %.loc10_15.2: ref %Enum = temporary %.loc10_15.1, %b.ref
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// CHECK:STDOUT: assign %a.ref.loc10, %.loc10_15.2
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.bound.loc10: <bound method> = bound_method %.loc10_15.2, constants.%T.as.Destroy.impl.Op.bbe
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %bound_method.loc10: <bound method> = bound_method %.loc10_15.2, %T.as.Destroy.impl.Op.specific_fn.1
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// CHECK:STDOUT: %addr.loc10: %ptr.47b = addr_of %.loc10_15.2
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.call.loc10: init %empty_tuple.type = call %bound_method.loc10(%addr.loc10)
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.bound.loc8_29: <bound method> = bound_method %.loc8_29.2, constants.%T.as.Destroy.impl.Op.bbe
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %bound_method.loc8_29: <bound method> = bound_method %.loc8_29.2, %T.as.Destroy.impl.Op.specific_fn.2
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// CHECK:STDOUT: %addr.loc8_29: %ptr.47b = addr_of %.loc8_29.2
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.call.loc8_29: init %empty_tuple.type = call %bound_method.loc8_29(%addr.loc8_29)
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.bound.loc8_3: <bound method> = bound_method %a.var, constants.%T.as.Destroy.impl.Op.bbe
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %bound_method.loc8_3: <bound method> = bound_method %a.var, %T.as.Destroy.impl.Op.specific_fn.3
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// CHECK:STDOUT: %addr.loc8_3: %ptr.47b = addr_of %a.var
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// CHECK:STDOUT: %T.as.Destroy.impl.Op.call.loc8_3: init %empty_tuple.type = call %bound_method.loc8_3(%addr.loc8_3)
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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