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c5eba90317bfb81f4f22de9db149e79b7d6bc97d
carbon-lang/toolchain/check/testdata/as/partial.carbon
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Jon Ross-Perkins c5eba90317 Change Destroy to use a CustomWitness instead of a blanket impl (#6512) 
Pursuant to recent decisions on #6124, switch `Destroy` to use a
`CustomWitness` for its implementation. Right now this is manufacturing
no-op implementation functions on each lookup, which obviously isn't
ideal but is intended as a first pass. I'm mostly trying to find the
right balance between updating the approach to reflect new decisions,
while still breaking apart work in a way.

The `CoreInterface` logic is intended to build on `CoreIdentifier`
support. We have a number of additional interfaces that require
specialized logic, and that'll extend pretty far with C++ interop, so it
seemed easiest to have a generic function for it. That's what's
replacing the logic inside C++ interop that was doing string comparisons
(which could have already been moved to `CoreIdentifier`, I just missed
it in my first pass).

This adds `CustomWitness` support because the `Destroy` witnesses can be
imported cross-file. `CustomWitness` was previously only used for C++
types, which don't yet support import, which is why that wasn't
previously an issue. The addition of `query_specific_interface_id` is
similarly needed in order to get correct sorting of witness blocks when
imported.

This PR also removes builtin constraint logic (note this is in a
separate commit to help review; it's not a separate PR because it's
difficult to split apart without tests breaking). This had been made
generic with the expectation that destroy, copy, move, and conversions
would all need related support. Under the new decision, we are not going
to do blanket impls and will instead just manufacture a `CustomWitness`
for everything.

A lot of SemIR fingerprints change, but that's probably because the
addition of `Destroy` on core classes is yielding structural changes.
2025-12-19 18:36:06 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/as/partial.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/as/partial.carbon
// --- add_partial.carbon
library "[[@TEST_NAME]]";
base class X {}
fn Init() -> X;
let value: X = Init();
var reference: X;
let ptr: X* = &reference;
fn Use() {
// TODO: Should some of these be valid without the `as`?
//@dump-sem-ir-begin
var i: partial X = Init() as partial X;
let v: partial X = value as partial X;
let a: partial X* = &(reference as partial X);
let b: partial X* = ptr as partial X*;
//@dump-sem-ir-end
}
// --- fail_todo_remove_partial_in_init.carbon
library "[[@TEST_NAME]]";
base class X {}
fn Init() -> partial X;
fn Use() {
//@dump-sem-ir-begin
// TODO: This should be valid, and should initialize the vptr. The explicit `as` should probably not be necessary.
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+7]]:3: error: cannot implicitly convert expression of type `partial X` to `X` [ConversionFailure]
// CHECK:STDERR: var i: X = Init();
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+4]]:3: note: type `partial X` does not implement interface `Core.ImplicitAs(X)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: var i: X = Init();
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
var i: X = Init();
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+7]]:14: error: cannot convert expression of type `partial X` to `X` with `as` [ConversionFailure]
// CHECK:STDERR: var j: X = Init() as X;
// CHECK:STDERR: ^~~~~~~~~~~
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+4]]:14: note: type `partial X` does not implement interface `Core.As(X)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: var j: X = Init() as X;
// CHECK:STDERR: ^~~~~~~~~~~
// CHECK:STDERR:
var j: X = Init() as X;
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+7]]:14: error: cannot convert expression of type `partial X` to `X` with `unsafe as` [ConversionFailure]
// CHECK:STDERR: var k: X = Init() unsafe as X;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_todo_remove_partial_in_init.carbon:[[@LINE+4]]:14: note: type `partial X` does not implement interface `Core.UnsafeAs(X)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: var k: X = Init() unsafe as X;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
var k: X = Init() unsafe as X;
//@dump-sem-ir-end
}
// --- fail_cannot_remove_partial.carbon
library "[[@TEST_NAME]]";
base class X {}
fn Init() -> partial X;
let value: partial X = Init();
var reference: partial X;
let ptr: partial X* = &reference;
fn Use() {
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+7]]:14: error: cannot convert expression of type `partial X` to `X` with `as` [ConversionFailure]
// CHECK:STDERR: let v: X = value as X;
// CHECK:STDERR: ^~~~~~~~~~
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+4]]:14: note: type `partial X` does not implement interface `Core.As(X)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: let v: X = value as X;
// CHECK:STDERR: ^~~~~~~~~~
// CHECK:STDERR:
let v: X = value as X;
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+7]]:17: error: cannot convert expression of type `partial X` to `X` with `as` [ConversionFailure]
// CHECK:STDERR: let a: X* = &(reference as X);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+4]]:17: note: type `partial X` does not implement interface `Core.As(X)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: let a: X* = &(reference as X);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
let a: X* = &(reference as X);
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+7]]:15: error: cannot convert expression of type `partial X*` to `X*` with `as` [ConversionFailure]
// CHECK:STDERR: let b: X* = ptr as X*;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_cannot_remove_partial.carbon:[[@LINE+4]]:15: note: type `partial X*` does not implement interface `Core.As(X*)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: let b: X* = ptr as X*;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
let b: X* = ptr as X*;
}
// --- unsafe_remove_partial.carbon
library "[[@TEST_NAME]]";
base class X {}
fn Init() -> partial X;
let value: partial X = Init();
var reference: partial X;
let ptr: partial X* = &reference;
fn Use() {
//@dump-sem-ir-begin
let v: X = value unsafe as X;
let a: X* = &(reference unsafe as X);
let b: X* = ptr unsafe as X*;
//@dump-sem-ir-end
}
// CHECK:STDOUT: --- add_partial.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %Init.type: type = fn_type @Init [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Init: %Init.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.2a9: type = ptr_type %X [concrete]
// CHECK:STDOUT: %.4b5: type = partial_type %X [concrete]
// CHECK:STDOUT: %pattern_type.bc5: type = pattern_type %.4b5 [concrete]
// CHECK:STDOUT: %ptr.314: type = ptr_type %.4b5 [concrete]
// CHECK:STDOUT: %pattern_type.408: type = pattern_type %ptr.314 [concrete]
// CHECK:STDOUT: %reference.var: ref %.4b5 = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.315: %ptr.314 = addr_of %reference.var [concrete]
// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %i.patt: %pattern_type.bc5 = ref_binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.bc5 = var_pattern %i.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i.var: ref %.4b5 = var %i.var_patt
// CHECK:STDOUT: %Init.ref: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc14_3: ref %.4b5 = splice_block %i.var {}
// CHECK:STDOUT: %Init.call: init %X = call %Init.ref() to %.loc14_3
// CHECK:STDOUT: %X.ref.loc14_40: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc14_32: type = partial_type %X.ref.loc14_40 [concrete = constants.%.4b5]
// CHECK:STDOUT: %.loc14_29.1: init %.4b5 = as_compatible %Init.call
// CHECK:STDOUT: %.loc14_29.2: init %.4b5 = converted %Init.call, %.loc14_29.1
// CHECK:STDOUT: assign %i.var, %.loc14_29.2
// CHECK:STDOUT: %.loc14_10.1: type = splice_block %.loc14_10.2 [concrete = constants.%.4b5] {
// CHECK:STDOUT: %X.ref.loc14_18: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc14_10.2: type = partial_type %X.ref.loc14_18 [concrete = constants.%.4b5]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i: ref %.4b5 = ref_binding i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %v.patt: %pattern_type.bc5 = value_binding_pattern v [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %value.ref: %X = name_ref value, file.%value
// CHECK:STDOUT: %X.ref.loc15_39: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc15_31: type = partial_type %X.ref.loc15_39 [concrete = constants.%.4b5]
// CHECK:STDOUT: %.loc15_28.1: %.4b5 = as_compatible %value.ref
// CHECK:STDOUT: %.loc15_28.2: %.4b5 = converted %value.ref, %.loc15_28.1
// CHECK:STDOUT: %.loc15_10.1: type = splice_block %.loc15_10.2 [concrete = constants.%.4b5] {
// CHECK:STDOUT: %X.ref.loc15_18: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc15_10.2: type = partial_type %X.ref.loc15_18 [concrete = constants.%.4b5]
// CHECK:STDOUT: }
// CHECK:STDOUT: %v: %.4b5 = value_binding v, %.loc15_28.2
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.408 = value_binding_pattern a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %reference.ref: ref %X = name_ref reference, file.%reference [concrete = file.%reference.var]
// CHECK:STDOUT: %X.ref.loc16_46: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc16_38: type = partial_type %X.ref.loc16_46 [concrete = constants.%.4b5]
// CHECK:STDOUT: %.loc16_35.1: ref %.4b5 = as_compatible %reference.ref [concrete = constants.%reference.var]
// CHECK:STDOUT: %.loc16_35.2: ref %.4b5 = converted %reference.ref, %.loc16_35.1 [concrete = constants.%reference.var]
// CHECK:STDOUT: %addr: %ptr.314 = addr_of %.loc16_35.2 [concrete = constants.%addr.315]
// CHECK:STDOUT: %.loc16_19: type = splice_block %ptr.loc16 [concrete = constants.%ptr.314] {
// CHECK:STDOUT: %X.ref.loc16_18: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc16_10: type = partial_type %X.ref.loc16_18 [concrete = constants.%.4b5]
// CHECK:STDOUT: %ptr.loc16: type = ptr_type %.loc16_10 [concrete = constants.%ptr.314]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.314 = value_binding a, %addr
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.408 = value_binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.2a9 = name_ref ptr, file.%ptr.loc9_5
// CHECK:STDOUT: %X.ref.loc17_38: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc17_30: type = partial_type %X.ref.loc17_38 [concrete = constants.%.4b5]
// CHECK:STDOUT: %ptr.loc17_39: type = ptr_type %.loc17_30 [concrete = constants.%ptr.314]
// CHECK:STDOUT: %.loc17_27.1: %ptr.314 = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc17_27.2: %ptr.314 = converted %ptr.ref, %.loc17_27.1
// CHECK:STDOUT: %.loc17_19: type = splice_block %ptr.loc17_19 [concrete = constants.%ptr.314] {
// CHECK:STDOUT: %X.ref.loc17_18: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc17_10: type = partial_type %X.ref.loc17_18 [concrete = constants.%.4b5]
// CHECK:STDOUT: %ptr.loc17_19: type = ptr_type %.loc17_10 [concrete = constants.%ptr.314]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.314 = value_binding b, %.loc17_27.2
// CHECK:STDOUT: %DestroyOp.bound: <bound method> = bound_method %i.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call: init %empty_tuple.type = call %DestroyOp.bound(%i.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @DestroyOp(%self.param: %.4b5) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_remove_partial_in_init.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %.4b5: type = partial_type %X [concrete]
// CHECK:STDOUT: %Init.type: type = fn_type @Init [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Init: %Init.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.05f: type = pattern_type %X [concrete]
// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %i.patt: %pattern_type.05f = ref_binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.05f = var_pattern %i.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i.var: ref %X = var %i.var_patt
// CHECK:STDOUT: %Init.ref.loc18: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc18_19: ref %.4b5 = temporary_storage
// CHECK:STDOUT: %Init.call.loc18: init %.4b5 = call %Init.ref.loc18() to %.loc18_19
// CHECK:STDOUT: %.loc18_3: %X = converted %Init.call.loc18, <error> [concrete = <error>]
// CHECK:STDOUT: assign %i.var, <error>
// CHECK:STDOUT: %X.ref.loc18: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %i: ref %X = ref_binding i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %j.patt: %pattern_type.05f = ref_binding_pattern j [concrete]
// CHECK:STDOUT: %j.var_patt: %pattern_type.05f = var_pattern %j.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %j.var: ref %X = var %j.var_patt
// CHECK:STDOUT: %Init.ref.loc26: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc26_19: ref %.4b5 = temporary_storage
// CHECK:STDOUT: %Init.call.loc26: init %.4b5 = call %Init.ref.loc26() to %.loc26_19
// CHECK:STDOUT: %X.ref.loc26_24: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc26_21: %X = converted %Init.call.loc26, <error> [concrete = <error>]
// CHECK:STDOUT: assign %j.var, <error>
// CHECK:STDOUT: %X.ref.loc26_10: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %j: ref %X = ref_binding j, %j.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %k.patt: %pattern_type.05f = ref_binding_pattern k [concrete]
// CHECK:STDOUT: %k.var_patt: %pattern_type.05f = var_pattern %k.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %k.var: ref %X = var %k.var_patt
// CHECK:STDOUT: %Init.ref.loc34: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc34_19: ref %.4b5 = temporary_storage
// CHECK:STDOUT: %Init.call.loc34: init %.4b5 = call %Init.ref.loc34() to %.loc34_19
// CHECK:STDOUT: %X.ref.loc34_31: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc34_28: %X = converted %Init.call.loc34, <error> [concrete = <error>]
// CHECK:STDOUT: assign %k.var, <error>
// CHECK:STDOUT: %X.ref.loc34_10: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %k: ref %X = ref_binding k, %k.var
// CHECK:STDOUT: %DestroyOp.bound.loc34: <bound method> = bound_method %k.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call.loc34: init %empty_tuple.type = call %DestroyOp.bound.loc34(%k.var)
// CHECK:STDOUT: %DestroyOp.bound.loc26: <bound method> = bound_method %j.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call.loc26: init %empty_tuple.type = call %DestroyOp.bound.loc26(%j.var)
// CHECK:STDOUT: %DestroyOp.bound.loc18: <bound method> = bound_method %i.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call.loc18: init %empty_tuple.type = call %DestroyOp.bound.loc18(%i.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @DestroyOp(%self.param: %X) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: --- unsafe_remove_partial.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %.4b5: type = partial_type %X [concrete]
// CHECK:STDOUT: %ptr.314: type = ptr_type %.4b5 [concrete]
// CHECK:STDOUT: %pattern_type.05f: type = pattern_type %X [concrete]
// CHECK:STDOUT: %ptr.2a9: type = ptr_type %X [concrete]
// CHECK:STDOUT: %pattern_type.37f: type = pattern_type %ptr.2a9 [concrete]
// CHECK:STDOUT: %reference.var: ref %X = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.9cd: %ptr.2a9 = addr_of %reference.var [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Use() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %v.patt: %pattern_type.05f = value_binding_pattern v [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %value.ref: %.4b5 = name_ref value, file.%value
// CHECK:STDOUT: %X.ref.loc14_30: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc14_27.1: %X = as_compatible %value.ref
// CHECK:STDOUT: %.loc14_27.2: %X = converted %value.ref, %.loc14_27.1
// CHECK:STDOUT: %X.ref.loc14_10: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %v: %X = value_binding v, %.loc14_27.2
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.37f = value_binding_pattern a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %reference.ref: ref %.4b5 = name_ref reference, file.%reference [concrete = file.%reference.var]
// CHECK:STDOUT: %X.ref.loc15_37: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %.loc15_34.1: ref %X = as_compatible %reference.ref [concrete = constants.%reference.var]
// CHECK:STDOUT: %.loc15_34.2: ref %X = converted %reference.ref, %.loc15_34.1 [concrete = constants.%reference.var]
// CHECK:STDOUT: %addr: %ptr.2a9 = addr_of %.loc15_34.2 [concrete = constants.%addr.9cd]
// CHECK:STDOUT: %.loc15_11: type = splice_block %ptr.loc15 [concrete = constants.%ptr.2a9] {
// CHECK:STDOUT: %X.ref.loc15_10: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc15: type = ptr_type %X.ref.loc15_10 [concrete = constants.%ptr.2a9]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.2a9 = value_binding a, %addr
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.37f = value_binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.314 = name_ref ptr, file.%ptr.loc10_5
// CHECK:STDOUT: %X.ref.loc16_29: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc16_30: type = ptr_type %X.ref.loc16_29 [concrete = constants.%ptr.2a9]
// CHECK:STDOUT: %.loc16_26.1: %ptr.2a9 = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc16_26.2: %ptr.2a9 = converted %ptr.ref, %.loc16_26.1
// CHECK:STDOUT: %.loc16_11: type = splice_block %ptr.loc16_11 [concrete = constants.%ptr.2a9] {
// CHECK:STDOUT: %X.ref.loc16_10: type = name_ref X, file.%X.decl [concrete = constants.%X]
// CHECK:STDOUT: %ptr.loc16_11: type = ptr_type %X.ref.loc16_10 [concrete = constants.%ptr.2a9]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.2a9 = value_binding b, %.loc16_26.2
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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