mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-03 12:05:49 +01:00
Richard Smith
b138c90c9e
Remove the type canonicalization mechanism and instead rely on constant canonicalization to deduplicate types. Rename the `Canonicalize*Type` functions to reflect that they're no longer performing canonicalization. Switch code that creates types due to semantic checking, rather than due to source syntax, to directly create type constants through evaluation rather than creating an instruction and evaluating it to produce a separate constant representation. The mapping from `const (const T)` that was previously performed by type canonicalization is now implemented in expression evaluation instead. The value `<error>` is now treated as a constant value, with a special property that an instruction involving `<error>` that could possibly be constant evaluates to `<error>`. This helps avoid producing follow-on errors when an error occurs as a subexpression of an expression, such as a type, that is intended to be constant.
108 lines
5.3 KiB
Plaintext
108 lines
5.3 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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// AUTOUPDATE
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abstract class Abstract {
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var a: i32;
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}
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class Derived {
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extend base: Abstract;
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var d: i32;
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}
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fn Make() -> Derived {
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// TODO: This should be valid, and should construct an instance of `partial Abstract` as the base.
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// CHECK:STDERR: fail_abstract.carbon:[[@LINE+3]]:19: ERROR: Cannot construct instance of abstract class. Consider using `partial Abstract` instead.
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// CHECK:STDERR: return {.base = {.a = 1}, .d = 7};
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// CHECK:STDERR: ^~~~~~~~
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return {.base = {.a = 1}, .d = 7};
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}
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fn Access(d: Derived) -> (i32, i32) {
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return (d.d, d.base.a);
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}
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// CHECK:STDOUT: --- fail_abstract.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Abstract: type = class_type @Abstract [template]
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// CHECK:STDOUT: %.1: type = unbound_element_type Abstract, i32 [template]
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// CHECK:STDOUT: %.2: type = struct_type {.a: i32} [template]
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// CHECK:STDOUT: %Derived: type = class_type @Derived [template]
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// CHECK:STDOUT: %.3: type = ptr_type {.a: i32} [template]
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// CHECK:STDOUT: %.4: type = unbound_element_type Derived, Abstract [template]
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// CHECK:STDOUT: %.5: type = unbound_element_type Derived, i32 [template]
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// CHECK:STDOUT: %.6: type = struct_type {.base: Abstract, .d: i32} [template]
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// CHECK:STDOUT: %.7: type = struct_type {.base: {.a: i32}*, .d: i32} [template]
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// CHECK:STDOUT: %.8: type = ptr_type {.base: {.a: i32}*, .d: i32} [template]
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// CHECK:STDOUT: %.9: type = ptr_type {.base: Abstract, .d: i32} [template]
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// CHECK:STDOUT: %.10: i32 = int_literal 1 [template]
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// CHECK:STDOUT: %.11: i32 = int_literal 7 [template]
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// CHECK:STDOUT: %.12: type = struct_type {.base: {.a: i32}, .d: i32} [template]
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// CHECK:STDOUT: %.13: type = tuple_type (type, type) [template]
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// CHECK:STDOUT: %.14: type = tuple_type (i32, i32) [template]
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// CHECK:STDOUT: %.15: type = ptr_type (i32, i32) [template]
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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 package, {.Abstract = %Abstract.decl, .Derived = %Derived.decl, .Make = %Make, .Access = %Access} [template]
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// CHECK:STDOUT: %Abstract.decl = class_decl @Abstract, ()
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// CHECK:STDOUT: %Derived.decl = class_decl @Derived, ()
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// CHECK:STDOUT: %Make: <function> = fn_decl @Make [template]
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// CHECK:STDOUT: %Access: <function> = fn_decl @Access [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @Abstract {
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// CHECK:STDOUT: %.loc8: <unbound element of class Abstract> = field_decl a, element0 [template]
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// CHECK:STDOUT: %a: <unbound element of class Abstract> = bind_name a, %.loc8 [template = %.loc8]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .a = %a
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @Derived {
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// CHECK:STDOUT: %Abstract.ref: type = name_ref Abstract, constants.%Abstract [template = constants.%Abstract]
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// CHECK:STDOUT: %.loc12: <unbound element of class Derived> = base_decl Abstract, element0 [template]
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// CHECK:STDOUT: %.loc14: <unbound element of class Derived> = field_decl d, element1 [template]
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// CHECK:STDOUT: %d: <unbound element of class Derived> = bind_name d, %.loc14 [template = %.loc14]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .base = %.loc12
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// CHECK:STDOUT: .d = %d
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// CHECK:STDOUT: extend name_scope1
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Make() -> %return: Derived {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %.loc22_25: i32 = int_literal 1 [template = constants.%.10]
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// CHECK:STDOUT: %.loc22_26: {.a: i32} = struct_literal (%.loc22_25)
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// CHECK:STDOUT: %.loc22_34: i32 = int_literal 7 [template = constants.%.11]
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// CHECK:STDOUT: %.loc22_35: {.base: {.a: i32}, .d: i32} = struct_literal (%.loc22_26, %.loc22_34)
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// CHECK:STDOUT: return <error>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Access(%d: Derived) -> %return: (i32, i32) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %d.ref.loc26_11: Derived = name_ref d, %d
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// CHECK:STDOUT: %.loc26_12.1: ref i32 = class_element_access %d.ref.loc26_11, element1
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// CHECK:STDOUT: %.loc26_12.2: i32 = bind_value %.loc26_12.1
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// CHECK:STDOUT: %d.ref.loc26_16: Derived = name_ref d, %d
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// CHECK:STDOUT: %.loc26_17.1: ref Abstract = class_element_access %d.ref.loc26_16, element0
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// CHECK:STDOUT: %.loc26_17.2: Abstract = bind_value %.loc26_17.1
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// CHECK:STDOUT: %.loc26_22.1: ref i32 = class_element_access %.loc26_17.2, element0
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// CHECK:STDOUT: %.loc26_22.2: i32 = bind_value %.loc26_22.1
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// CHECK:STDOUT: %.loc26_24.1: (i32, i32) = tuple_literal (%.loc26_12.2, %.loc26_22.2)
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// CHECK:STDOUT: %.loc26_24.2: ref i32 = tuple_access %return, element0
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// CHECK:STDOUT: %.loc26_24.3: init i32 = initialize_from %.loc26_12.2 to %.loc26_24.2
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// CHECK:STDOUT: %.loc26_24.4: ref i32 = tuple_access %return, element1
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// CHECK:STDOUT: %.loc26_24.5: init i32 = initialize_from %.loc26_22.2 to %.loc26_24.4
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// CHECK:STDOUT: %.loc26_24.6: init (i32, i32) = tuple_init (%.loc26_24.3, %.loc26_24.5) to %return
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// CHECK:STDOUT: %.loc26_24.7: init (i32, i32) = converted %.loc26_24.1, %.loc26_24.6
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// CHECK:STDOUT: return %.loc26_24.7
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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