mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-03 22:02:51 +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.
107 lines
4.6 KiB
Plaintext
107 lines
4.6 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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base class A1 {
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var a: i32;
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}
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base class A2 {
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var a: i32;
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}
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class B2 {
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extend base: A2;
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var b: i32;
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}
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// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+3]]:38: ERROR: Cannot implicitly convert from `B2*` to `A1*`.
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// CHECK:STDERR: fn ConvertUnrelated(p: B2*) -> A1* { return p; }
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// CHECK:STDERR: ^~~~~~~~~
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fn ConvertUnrelated(p: B2*) -> A1* { return p; }
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class Incomplete;
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// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+3]]:47: ERROR: Cannot implicitly convert from `Incomplete*` to `A2*`.
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// CHECK:STDERR: fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
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// CHECK:STDERR: ^~~~~~~~~
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fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
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// CHECK:STDOUT: --- fail_derived_to_base.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %A1: type = class_type @A1 [template]
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// CHECK:STDOUT: %.1: type = unbound_element_type A1, i32 [template]
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// CHECK:STDOUT: %.2: type = struct_type {.a: i32} [template]
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// CHECK:STDOUT: %A2: type = class_type @A2 [template]
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// CHECK:STDOUT: %.3: type = unbound_element_type A2, i32 [template]
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// CHECK:STDOUT: %B2: type = class_type @B2 [template]
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// CHECK:STDOUT: %.4: type = ptr_type {.a: i32} [template]
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// CHECK:STDOUT: %.5: type = unbound_element_type B2, A2 [template]
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// CHECK:STDOUT: %.6: type = unbound_element_type B2, i32 [template]
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// CHECK:STDOUT: %.7: type = struct_type {.base: A2, .b: i32} [template]
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// CHECK:STDOUT: %.8: type = ptr_type B2 [template]
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// CHECK:STDOUT: %.9: type = ptr_type A1 [template]
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// CHECK:STDOUT: %.10: type = struct_type {.base: {.a: i32}*, .b: i32} [template]
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// CHECK:STDOUT: %.11: type = ptr_type {.base: {.a: i32}*, .b: i32} [template]
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// CHECK:STDOUT: %.12: type = ptr_type {.base: A2, .b: i32} [template]
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// CHECK:STDOUT: %Incomplete: type = class_type @Incomplete [template]
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// CHECK:STDOUT: %.13: type = ptr_type Incomplete [template]
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// CHECK:STDOUT: %.14: type = ptr_type A2 [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, {.A1 = %A1.decl, .A2 = %A2.decl, .B2 = %B2.decl, .ConvertUnrelated = %ConvertUnrelated, .Incomplete = %Incomplete.decl, .ConvertIncomplete = %ConvertIncomplete} [template]
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// CHECK:STDOUT: %A1.decl = class_decl @A1, ()
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// CHECK:STDOUT: %A2.decl = class_decl @A2, ()
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// CHECK:STDOUT: %B2.decl = class_decl @B2, ()
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// CHECK:STDOUT: %ConvertUnrelated: <function> = fn_decl @ConvertUnrelated [template]
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// CHECK:STDOUT: %Incomplete.decl = class_decl @Incomplete, ()
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// CHECK:STDOUT: %ConvertIncomplete: <function> = fn_decl @ConvertIncomplete [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @A1 {
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// CHECK:STDOUT: %.loc8: <unbound element of class A1> = field_decl a, element0 [template]
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// CHECK:STDOUT: %a: <unbound element of class A1> = 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 @A2 {
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// CHECK:STDOUT: %.loc12: <unbound element of class A2> = field_decl a, element0 [template]
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// CHECK:STDOUT: %a: <unbound element of class A2> = bind_name a, %.loc12 [template = %.loc12]
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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 @B2 {
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// CHECK:STDOUT: %A2.ref: type = name_ref A2, constants.%A2 [template = constants.%A2]
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// CHECK:STDOUT: %.loc16: <unbound element of class B2> = base_decl A2, element0 [template]
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// CHECK:STDOUT: %.loc17: <unbound element of class B2> = field_decl b, element1 [template]
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// CHECK:STDOUT: %b: <unbound element of class B2> = bind_name b, %.loc17 [template = %.loc17]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .base = %.loc16
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// CHECK:STDOUT: .b = %b
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// CHECK:STDOUT: extend name_scope2
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @Incomplete;
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @ConvertUnrelated(%p: B2*) -> A1* {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %p.ref: B2* = name_ref p, %p
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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 @ConvertIncomplete(%p: Incomplete*) -> A2* {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %p.ref: Incomplete* = name_ref p, %p
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// CHECK:STDOUT: return <error>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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