mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 22:02:51 +01:00
Dana Jansens
fcae9610bd
The type `type` is now a `FacetType` inst with no constraints. This brings the model implemented in the toolchain into better alignment with the language design. The `SemIR::TypeType` struct remains as a scope for holding the `TypeInstId`, `ConstantId`, and `TypeId` constants, but is not an `InstKind` anymore. The `TypeType` inst looks a lot like singletons, but there are many `FacetType` insts so it doesn't quite fit that model. So we put it alongside singletons with a fixed inst id but refer to it as a more general "builtin" inst that is not a singleton. `Namespace::PackageInstId` is similar, and we group it with `TypeType` conceptually as another builtin instruction with a fixed id. No conversion is needed anymore to use a `type` as a facet, since types also have a `FacetType` type. This simplifies and removes a number of helpers and branches throughout the code. The `TypeType` inst is now part of the constant store, so we end up printing it in the constants block in every test. But it's also named `type` rather than `%type` to preserve the majority of existing formatting behaviour, though this does look different from other constants. Assisted-by: Opus 5 was used to generate a first draft and validate the refactoring. Though nearly everything non-trivial the tool wrote has been modified or rewritten.
71 lines
4.1 KiB
Plaintext
71 lines
4.1 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/none.carbon
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// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
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// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
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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/struct/empty.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/struct/empty.carbon
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var x: {} = {};
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var y: {} = x;
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// CHECK:STDOUT: --- empty.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: type: type = facet_type <type> [concrete]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
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// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
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// CHECK:STDOUT: %pattern_type: type = pattern_type %empty_struct_type [concrete]
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// CHECK:STDOUT: %x.patt: %pattern_type = ref_binding_pattern x [concrete]
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// CHECK:STDOUT: %x.var_patt: %pattern_type = var_pattern %x.patt [concrete]
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// CHECK:STDOUT: %y.patt: %pattern_type = ref_binding_pattern y [concrete]
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// CHECK:STDOUT: %y.var_patt: %pattern_type = var_pattern %y.patt [concrete]
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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: package: <namespace> = namespace [concrete] {
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// CHECK:STDOUT: .x = %x
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// CHECK:STDOUT: .y = %y
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %x.var: ref %empty_struct_type = var_storage %x.var_patt [concrete]
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// CHECK:STDOUT: %.loc15_9.1: type = splice_block %.loc15_9.3 [concrete = constants.%empty_struct_type] {
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// CHECK:STDOUT: %.loc15_9.2: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc15_9.3: type = converted %.loc15_9.2, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %x: ref %empty_struct_type = wrapper_binding x, %x.var [concrete = %x.var]
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %x.patt: %pattern_type = ref_binding_pattern x [concrete = constants.%x.patt]
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// CHECK:STDOUT: %x.var_patt: %pattern_type = var_pattern %x.patt [concrete = constants.%x.var_patt]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %y.var: ref %empty_struct_type = var_storage %y.var_patt [concrete]
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// CHECK:STDOUT: %.loc16_9.1: type = splice_block %.loc16_9.3 [concrete = constants.%empty_struct_type] {
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// CHECK:STDOUT: %.loc16_9.2: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc16_9.3: type = converted %.loc16_9.2, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %y: ref %empty_struct_type = wrapper_binding y, %y.var [concrete = %y.var]
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %y.patt: %pattern_type = ref_binding_pattern y [concrete = constants.%y.patt]
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// CHECK:STDOUT: %y.var_patt: %pattern_type = var_pattern %y.patt [concrete = constants.%y.var_patt]
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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 @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %.loc15_14.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc15_14.2: init %empty_struct_type = struct_init () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc15_1: init %empty_struct_type = converted %.loc15_14.1, %.loc15_14.2 [concrete = constants.%empty_struct]
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// CHECK:STDOUT: assign file.%x.var, %.loc15_1
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// CHECK:STDOUT: %x.ref: ref %empty_struct_type = name_ref x, file.%x [concrete = file.%x.var]
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// CHECK:STDOUT: %.loc16_13: init %empty_struct_type = struct_init () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc16_1: init %empty_struct_type = converted %x.ref, %.loc16_13 [concrete = constants.%empty_struct]
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// CHECK:STDOUT: assign file.%y.var, %.loc16_1
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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