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carbon-lang/toolchain/check/testdata/as/partial.carbon
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Dana Jansens e682a6660d Avoid adding extraneous local instructions while importing witness table entries (#6180) 
When deducing arguments for generic parameters of an `impl`, the
deduction calls `Convert` on the input arguments. Often, the input
argument is a facet, and needs to be converted to a type via
FacetAccessType in order to produce a different facet. These
instructions end up being added to the semir, but only their constant
values are needed for the resulting specific returned from Deduce.

In the best case, these extra instructions are just noise in the semir,
or they just cause instruction names to get differentiated with larger
suffixes.

In the worst case, these extra instructions contain references to
instructions from a generic context, and leak them out of that generic
context and into another. In particular, when importing a
LookupImplWitness instruction, the re-evaluation of it can do deduce
(when the lookup is against a generic `impl`). The instructions created
in Deduce are not part of the import, and end up referring to imported
instructions from the local context, which leads to confusion in the
toolchain, and can crash.

The `import_self_specific.carbon` test demonstrates this. It causes the
`I.F` function to be imported from the `I` interface when building the
witness table for the `impl`. Doing so imports the specific of `C` which
includes a LookupImplWitness for `Self.Accoc` in `I`. The `Self` is a
BindSymbolicName with generic binding index 0, in `I`. When Convert
creates instructions in the generic `impl forall D`, however, they end
up referencing and including this BindSymbolicName into its eval block.
But the generic binding 0 in the `impl` is a very different thing (a
value of type `E`). This confusion leads to crashes.
2025-10-09 16:07:30 +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.d17: type = ptr_type %X [concrete]
// CHECK:STDOUT: %.e71: type = partial_type %X [concrete]
// CHECK:STDOUT: %pattern_type.a53: type = pattern_type %.e71 [concrete]
// CHECK:STDOUT: %ptr.7b2: type = ptr_type %.e71 [concrete]
// CHECK:STDOUT: %pattern_type.46e: type = pattern_type %ptr.7b2 [concrete]
// CHECK:STDOUT: %reference.var: ref %.e71 = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.e01: %ptr.7b2 = addr_of %reference.var [concrete]
// CHECK:STDOUT: %type_where: type = facet_type <type where .Self impls <CanDestroy>> [concrete]
// CHECK:STDOUT: %facet_value: %type_where = facet_value %.e71, () [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.f3c: type = fn_type @DestroyT.binding.as_type.as.Destroy.impl.Op, @DestroyT.binding.as_type.as.Destroy.impl(%facet_value) [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.70b: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.f3c = 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.a53 = binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.a53 = var_pattern %i.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i.var: ref %.e71 = var %i.var_patt
// CHECK:STDOUT: %Init.ref: %Init.type = name_ref Init, file.%Init.decl [concrete = constants.%Init]
// CHECK:STDOUT: %.loc14_3: ref %.e71 = 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.%.e71]
// CHECK:STDOUT: %.loc14_29.1: init %.e71 = as_compatible %Init.call
// CHECK:STDOUT: %.loc14_29.2: init %.e71 = 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.%.e71] {
// 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.%.e71]
// CHECK:STDOUT: }
// CHECK:STDOUT: %i: ref %.e71 = bind_name i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %v.patt: %pattern_type.a53 = 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.%.e71]
// CHECK:STDOUT: %.loc15_28.1: %.e71 = as_compatible %value.ref
// CHECK:STDOUT: %.loc15_28.2: %.e71 = converted %value.ref, %.loc15_28.1
// CHECK:STDOUT: %.loc15_10.1: type = splice_block %.loc15_10.2 [concrete = constants.%.e71] {
// 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.%.e71]
// CHECK:STDOUT: }
// CHECK:STDOUT: %v: %.e71 = bind_name v, %.loc15_28.2
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.46e = 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.%.e71]
// CHECK:STDOUT: %.loc16_35.1: ref %.e71 = as_compatible %reference.ref [concrete = constants.%reference.var]
// CHECK:STDOUT: %.loc16_35.2: ref %.e71 = converted %reference.ref, %.loc16_35.1 [concrete = constants.%reference.var]
// CHECK:STDOUT: %addr.loc16: %ptr.7b2 = addr_of %.loc16_35.2 [concrete = constants.%addr.e01]
// CHECK:STDOUT: %.loc16_19: type = splice_block %ptr.loc16 [concrete = constants.%ptr.7b2] {
// 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.%.e71]
// CHECK:STDOUT: %ptr.loc16: type = ptr_type %.loc16_10 [concrete = constants.%ptr.7b2]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.7b2 = bind_name a, %addr.loc16
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.46e = binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.d17 = 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.%.e71]
// CHECK:STDOUT: %ptr.loc17_39: type = ptr_type %.loc17_30 [concrete = constants.%ptr.7b2]
// CHECK:STDOUT: %.loc17_27.1: %ptr.7b2 = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc17_27.2: %ptr.7b2 = converted %ptr.ref, %.loc17_27.1
// CHECK:STDOUT: %.loc17_19: type = splice_block %ptr.loc17_19 [concrete = constants.%ptr.7b2] {
// 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.%.e71]
// CHECK:STDOUT: %ptr.loc17_19: type = ptr_type %.loc17_10 [concrete = constants.%ptr.7b2]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.7b2 = bind_name b, %.loc17_27.2
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.bound: <bound method> = bound_method %i.var, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.70b
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %i.var, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn
// CHECK:STDOUT: %addr.loc14: %ptr.7b2 = addr_of %i.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.call: init %empty_tuple.type = call %bound_method(%addr.loc14)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// 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: %.e71: 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.019: type = pattern_type %X [concrete]
// CHECK:STDOUT: %type_where: type = facet_type <type where .Self impls <CanDestroy>> [concrete]
// CHECK:STDOUT: %facet_value: %type_where = facet_value %X, () [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.b2e: type = fn_type @DestroyT.binding.as_type.as.Destroy.impl.Op, @DestroyT.binding.as_type.as.Destroy.impl(%facet_value) [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.756: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.b2e = struct_value () [concrete]
// CHECK:STDOUT: %ptr.d17: type = ptr_type %X [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.019 = binding_pattern i [concrete]
// CHECK:STDOUT: %i.var_patt: %pattern_type.019 = 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 %.e71 = temporary_storage
// CHECK:STDOUT: %Init.call.loc18: init %.e71 = 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 = bind_name i, %i.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %j.patt: %pattern_type.019 = binding_pattern j [concrete]
// CHECK:STDOUT: %j.var_patt: %pattern_type.019 = 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 %.e71 = temporary_storage
// CHECK:STDOUT: %Init.call.loc26: init %.e71 = 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 = bind_name j, %j.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %k.patt: %pattern_type.019 = binding_pattern k [concrete]
// CHECK:STDOUT: %k.var_patt: %pattern_type.019 = 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 %.e71 = temporary_storage
// CHECK:STDOUT: %Init.call.loc34: init %.e71 = 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 = bind_name k, %k.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.bound.loc34: <bound method> = bound_method %k.var, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.756
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %bound_method.loc34: <bound method> = bound_method %k.var, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn.1
// CHECK:STDOUT: %addr.loc34: %ptr.d17 = addr_of %k.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.call.loc34: init %empty_tuple.type = call %bound_method.loc34(%addr.loc34)
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.bound.loc26: <bound method> = bound_method %j.var, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.756
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %bound_method.loc26: <bound method> = bound_method %j.var, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn.2
// CHECK:STDOUT: %addr.loc26: %ptr.d17 = addr_of %j.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.call.loc26: init %empty_tuple.type = call %bound_method.loc26(%addr.loc26)
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.bound.loc18: <bound method> = bound_method %i.var, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.756
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %bound_method.loc18: <bound method> = bound_method %i.var, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn.3
// CHECK:STDOUT: %addr.loc18: %ptr.d17 = addr_of %i.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.call.loc18: init %empty_tuple.type = call %bound_method.loc18(%addr.loc18)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- unsafe_remove_partial.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %X: type = class_type @X [concrete]
// CHECK:STDOUT: %.e71: type = partial_type %X [concrete]
// CHECK:STDOUT: %ptr.7b2: type = ptr_type %.e71 [concrete]
// CHECK:STDOUT: %pattern_type.019: type = pattern_type %X [concrete]
// CHECK:STDOUT: %ptr.d17: type = ptr_type %X [concrete]
// CHECK:STDOUT: %pattern_type.1c6: type = pattern_type %ptr.d17 [concrete]
// CHECK:STDOUT: %reference.var: ref %X = var file.%reference.var_patt [concrete]
// CHECK:STDOUT: %addr.c6b: %ptr.d17 = 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.019 = binding_pattern v [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %value.ref: %.e71 = 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 = bind_name v, %.loc14_27.2
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.1c6 = binding_pattern a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %reference.ref: ref %.e71 = 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.d17 = addr_of %.loc15_34.2 [concrete = constants.%addr.c6b]
// CHECK:STDOUT: %.loc15_11: type = splice_block %ptr.loc15 [concrete = constants.%ptr.d17] {
// 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.d17]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %ptr.d17 = bind_name a, %addr
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %b.patt: %pattern_type.1c6 = binding_pattern b [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %ptr.ref: %ptr.7b2 = 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.d17]
// CHECK:STDOUT: %.loc16_26.1: %ptr.d17 = as_compatible %ptr.ref
// CHECK:STDOUT: %.loc16_26.2: %ptr.d17 = converted %ptr.ref, %.loc16_26.1
// CHECK:STDOUT: %.loc16_11: type = splice_block %ptr.loc16_11 [concrete = constants.%ptr.d17] {
// 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.d17]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %ptr.d17 = bind_name 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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