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https://github.com/carbon-language/carbon-lang.git
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Dana Jansens
f51c075f8b
Point symbolic witnesses into `.Self` written inside an impl decl at the impl that is being declared. This is tricky because the impl does not yet exist. So we use a new instruction `ImplSelfWitness` which _will_ be replaced by the `ImplWitness` once it becomes available. The `ImplSelfWitness` acts like a symbolic witness, except it does not perform lookup, since we know which impl we will get a witness from. This prevents us from finding other impls when performing lookups into `.Self` in an impl decl, which produces incorrect/incoherent results.
86 lines
4.4 KiB
Plaintext
86 lines
4.4 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/full.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/operators/overloaded/add.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/operators/overloaded/add.carbon
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// This file was generated from binary_op.carbon.tmpl. Run make_tests.sh to regenerate.
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package User;
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class C {};
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impl C as Core.AddWith(C) where .Result = C {
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fn Op(unused self: C, unused other: C) -> C {
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return {};
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}
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}
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impl C as Core.AddAssignWith(C) {
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fn Op(unused ref self: C, unused other: C) {}
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}
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fn TestOp(a: C, b: C) -> C {
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//@dump-sem-ir-begin
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return a + b;
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//@dump-sem-ir-end
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}
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fn TestAssign(a: C*, b: C) {
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//@dump-sem-ir-begin
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*a += b;
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//@dump-sem-ir-end
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}
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// CHECK:STDOUT: --- add.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %C: type = class_type @C [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %AddWith.type.2bd: type = facet_type <@AddWith, @AddWith(%C)> [concrete]
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// CHECK:STDOUT: %AddWith.impl_witness: <witness> = impl_witness @C.as.AddWith.impl.%AddWith.impl_witness_table [concrete]
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// CHECK:STDOUT: %C.as.AddWith.impl.Op.type: type = fn_type @C.as.AddWith.impl.Op [concrete]
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// CHECK:STDOUT: %C.as.AddWith.impl.Op: %C.as.AddWith.impl.Op.type = struct_value () [concrete]
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// CHECK:STDOUT: %AddWith.facet: %AddWith.type.2bd = facet_value %C, (%AddWith.impl_witness) [concrete]
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// CHECK:STDOUT: %AddWith.WithSelf.Op.type.82f: type = fn_type @AddWith.WithSelf.Op, @AddWith.WithSelf(%C, %AddWith.facet) [concrete]
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// CHECK:STDOUT: %AddAssignWith.type.cba: type = facet_type <@AddAssignWith, @AddAssignWith(%C)> [concrete]
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// CHECK:STDOUT: %AddAssignWith.impl_witness: <witness> = impl_witness @C.as.AddAssignWith.impl.%AddAssignWith.impl_witness_table [concrete]
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// CHECK:STDOUT: %C.as.AddAssignWith.impl.Op.type: type = fn_type @C.as.AddAssignWith.impl.Op [concrete]
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// CHECK:STDOUT: %C.as.AddAssignWith.impl.Op: %C.as.AddAssignWith.impl.Op.type = struct_value () [concrete]
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// CHECK:STDOUT: %AddAssignWith.facet: %AddAssignWith.type.cba = facet_value %C, (%AddAssignWith.impl_witness) [concrete]
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// CHECK:STDOUT: %AddAssignWith.WithSelf.Op.type.62f: type = fn_type @AddAssignWith.WithSelf.Op, @AddAssignWith.WithSelf(%C, %AddAssignWith.facet) [concrete]
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// CHECK:STDOUT: %.5cc: type = fn_type_with_self_type %AddWith.WithSelf.Op.type.82f, %AddWith.facet [concrete]
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// CHECK:STDOUT: %ptr.00e: type = ptr_type %C [concrete]
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// CHECK:STDOUT: %.fbc: type = fn_type_with_self_type %AddAssignWith.WithSelf.Op.type.62f, %AddAssignWith.facet [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @TestOp(%a.param: %C, %b.param: %C) -> out %return.param: %C {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %a.ref: %C = name_ref a, %a
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// CHECK:STDOUT: %b.ref: %C = name_ref b, %b
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// CHECK:STDOUT: %impl.elem1: %.5cc = impl_witness_access constants.%AddWith.impl_witness, element1 [concrete = constants.%C.as.AddWith.impl.Op]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %a.ref, %impl.elem1
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %C.as.AddWith.impl.Op.call: init %C to %.loc30_26.1 = call %bound_method(%a.ref, %b.ref)
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// CHECK:STDOUT: return %C.as.AddWith.impl.Op.call to %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @TestAssign(%a.param: %ptr.00e, %b.param: %C) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %a.ref: %ptr.00e = name_ref a, %a
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// CHECK:STDOUT: %.loc38: ref %C = deref %a.ref
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// CHECK:STDOUT: %b.ref: %C = name_ref b, %b
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// CHECK:STDOUT: %impl.elem0: %.fbc = impl_witness_access constants.%AddAssignWith.impl_witness, element0 [concrete = constants.%C.as.AddAssignWith.impl.Op]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %.loc38, %impl.elem0
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// CHECK:STDOUT: %C.as.AddAssignWith.impl.Op.call: init %empty_tuple.type = call %bound_method(%.loc38, %b.ref)
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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