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carbon-lang/toolchain/check/testdata/pointer/fail_address_of_value.carbon
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Richard Smith b1230218d5 Make fingerprinting stable across compatible source changes. (#4789) 
Include the index rather than the name in the fingerprint of a symbolic
binding. While both the index and the name contribute to the canonical
identity, using either one of them in the fingerprint is sufficient to
ensure that distinct entities get different fingerprints. Changing the
name of a symbolic binding should ideally not result in fingerprint
changes, so exclude the name from the fingerprint when we have an index.

Use the canonical type and constraint when fingerprinting an impl, so
that uses of names in `name_ref` instructions aren't considered, only
the entity the name resolves to, and different ways of spelling the same
type have the same fingerprint. This similarly allows compatible changes
to be made to impls without changing the fingerprint.

Exclude the declaration block when determining the fingerprint of a
declaration. The declaration block contains the declarations of
parameters of the declaration, which do affect whether two declarations
are identical, but not whether they denote the same entity, because it
would be invalid to have different declaration blocks for declarations
with the same name in the same scope. Therefore changes to the
declaration block are compatible, and it's useful for such changes to
not affect the fingerprint.

This is not easy to test in isolation with our current testing
machinery. However, a follow-on PR will change the name of a parameter
in the prelude, and with this in place, will not cause any changes to
occur elsewhere in the toolchain tests.
2025-01-10 22:30:22 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/pointer/fail_address_of_value.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/pointer/fail_address_of_value.carbon
fn G() -> i32;
fn H() -> {.a: i32};
fn AddressOfLiteral() {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &0;
// CHECK:STDERR: ^
// CHECK:STDERR:
&0;
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &true;
// CHECK:STDERR: ^
// CHECK:STDERR:
&true;
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &1.0;
// CHECK:STDERR: ^
// CHECK:STDERR:
&1.0;
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &"Hello";
// CHECK:STDERR: ^
// CHECK:STDERR:
&"Hello";
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &(1, 2);
// CHECK:STDERR: ^
// CHECK:STDERR:
&(1, 2);
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &{.a = 5};
// CHECK:STDERR: ^
// CHECK:STDERR:
&{.a = 5};
}
fn AddressOfOperator() {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &(true and false);
// CHECK:STDERR: ^
// CHECK:STDERR:
&(true and false);
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of a temporary object [AddrOfEphemeralRef]
// CHECK:STDERR: &H().a;
// CHECK:STDERR: ^
// CHECK:STDERR:
&H().a;
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &(not true);
// CHECK:STDERR: ^
// CHECK:STDERR:
&(not true);
}
fn AddressOfCall() {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &G();
// CHECK:STDERR: ^
// CHECK:STDERR:
&G();
}
fn AddressOfType() {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &i32;
// CHECK:STDERR: ^
// CHECK:STDERR:
&i32;
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &(const i32*);
// CHECK:STDERR: ^
// CHECK:STDERR:
&(const i32*);
}
fn AddressOfTupleElementValue() {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+4]]:3: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: &((1, 2).0);
// CHECK:STDERR: ^
// CHECK:STDERR:
&((1, 2).0);
}
fn AddressOfParam(param: i32) {
// CHECK:STDERR: fail_address_of_value.carbon:[[@LINE+3]]:26: error: cannot take the address of non-reference expression [AddrOfNonRef]
// CHECK:STDERR: var param_addr: i32* = &param;
// CHECK:STDERR: ^
var param_addr: i32* = &param;
}
// CHECK:STDOUT: --- fail_address_of_value.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [template]
// CHECK:STDOUT: %G.type: type = fn_type @G [template]
// CHECK:STDOUT: %G: %G.type = struct_value () [template]
// CHECK:STDOUT: %struct_type.a.ba9: type = struct_type {.a: %i32} [template]
// CHECK:STDOUT: %H.type: type = fn_type @H [template]
// CHECK:STDOUT: %H: %H.type = struct_value () [template]
// CHECK:STDOUT: %AddressOfLiteral.type: type = fn_type @AddressOfLiteral [template]
// CHECK:STDOUT: %AddressOfLiteral: %AddressOfLiteral.type = struct_value () [template]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [template]
// CHECK:STDOUT: %ptr.1d1: type = ptr_type Core.IntLiteral [template]
// CHECK:STDOUT: %true: bool = bool_literal true [template]
// CHECK:STDOUT: %ptr.bb2: type = ptr_type bool [template]
// CHECK:STDOUT: %float: f64 = float_literal 1 [template]
// CHECK:STDOUT: %ptr.ef1: type = ptr_type f64 [template]
// CHECK:STDOUT: %ptr.a45: type = ptr_type String [template]
// CHECK:STDOUT: %str: String = string_literal "Hello" [template]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [template]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [template]
// CHECK:STDOUT: %tuple.type: type = tuple_type (Core.IntLiteral, Core.IntLiteral) [template]
// CHECK:STDOUT: %ptr.b50: type = ptr_type %tuple.type [template]
// CHECK:STDOUT: %int_5: Core.IntLiteral = int_value 5 [template]
// CHECK:STDOUT: %struct_type.a.a6c: type = struct_type {.a: Core.IntLiteral} [template]
// CHECK:STDOUT: %ptr.4e0: type = ptr_type %struct_type.a.a6c [template]
// CHECK:STDOUT: %AddressOfOperator.type: type = fn_type @AddressOfOperator [template]
// CHECK:STDOUT: %AddressOfOperator: %AddressOfOperator.type = struct_value () [template]
// CHECK:STDOUT: %false: bool = bool_literal false [template]
// CHECK:STDOUT: %ptr.235: type = ptr_type %i32 [template]
// CHECK:STDOUT: %AddressOfCall.type: type = fn_type @AddressOfCall [template]
// CHECK:STDOUT: %AddressOfCall: %AddressOfCall.type = struct_value () [template]
// CHECK:STDOUT: %AddressOfType.type: type = fn_type @AddressOfType [template]
// CHECK:STDOUT: %AddressOfType: %AddressOfType.type = struct_value () [template]
// CHECK:STDOUT: %ptr.db7: type = ptr_type type [template]
// CHECK:STDOUT: %const: type = const_type %i32 [template]
// CHECK:STDOUT: %ptr.36b: type = ptr_type %const [template]
// CHECK:STDOUT: %AddressOfTupleElementValue.type: type = fn_type @AddressOfTupleElementValue [template]
// CHECK:STDOUT: %AddressOfTupleElementValue: %AddressOfTupleElementValue.type = struct_value () [template]
// CHECK:STDOUT: %tuple: %tuple.type = tuple_value (%int_1, %int_2) [template]
// CHECK:STDOUT: %AddressOfParam.type: type = fn_type @AddressOfParam [template]
// CHECK:STDOUT: %AddressOfParam: %AddressOfParam.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Int = %import_ref.485
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: .H = %H.decl
// CHECK:STDOUT: .AddressOfLiteral = %AddressOfLiteral.decl
// CHECK:STDOUT: .AddressOfOperator = %AddressOfOperator.decl
// CHECK:STDOUT: .AddressOfCall = %AddressOfCall.decl
// CHECK:STDOUT: .AddressOfType = %AddressOfType.decl
// CHECK:STDOUT: .AddressOfTupleElementValue = %AddressOfTupleElementValue.decl
// CHECK:STDOUT: .AddressOfParam = %AddressOfParam.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [template = constants.%G] {
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT: %return.param: ref %i32 = out_param runtime_param0
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %H.decl: %H.type = fn_decl @H [template = constants.%H] {
// CHECK:STDOUT: %return.patt: %struct_type.a.ba9 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %struct_type.a.ba9 = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT: %struct_type.a: type = struct_type {.a: %i32} [template = constants.%struct_type.a.ba9]
// CHECK:STDOUT: %return.param: ref %struct_type.a.ba9 = out_param runtime_param0
// CHECK:STDOUT: %return: ref %struct_type.a.ba9 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %AddressOfLiteral.decl: %AddressOfLiteral.type = fn_decl @AddressOfLiteral [template = constants.%AddressOfLiteral] {} {}
// CHECK:STDOUT: %AddressOfOperator.decl: %AddressOfOperator.type = fn_decl @AddressOfOperator [template = constants.%AddressOfOperator] {} {}
// CHECK:STDOUT: %AddressOfCall.decl: %AddressOfCall.type = fn_decl @AddressOfCall [template = constants.%AddressOfCall] {} {}
// CHECK:STDOUT: %AddressOfType.decl: %AddressOfType.type = fn_decl @AddressOfType [template = constants.%AddressOfType] {} {}
// CHECK:STDOUT: %AddressOfTupleElementValue.decl: %AddressOfTupleElementValue.type = fn_decl @AddressOfTupleElementValue [template = constants.%AddressOfTupleElementValue] {} {}
// CHECK:STDOUT: %AddressOfParam.decl: %AddressOfParam.type = fn_decl @AddressOfParam [template = constants.%AddressOfParam] {
// CHECK:STDOUT: %param.patt: %i32 = binding_pattern param
// CHECK:STDOUT: %param.param_patt: %i32 = value_param_pattern %param.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %param.param: %i32 = value_param runtime_param0
// CHECK:STDOUT: %.loc95: type = splice_block %i32 [template = constants.%i32] {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %param: %i32 = bind_name param, %param.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G() -> %i32;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @H() -> %struct_type.a.ba9;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfLiteral() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [template = constants.%int_0]
// CHECK:STDOUT: %addr.loc20: %ptr.1d1 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %true: bool = bool_literal true [template = constants.%true]
// CHECK:STDOUT: %addr.loc25: %ptr.bb2 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %float: f64 = float_literal 1 [template = constants.%float]
// CHECK:STDOUT: %addr.loc30: %ptr.ef1 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %str: String = string_literal "Hello" [template = constants.%str]
// CHECK:STDOUT: %addr.loc35: %ptr.a45 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [template = constants.%int_1]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [template = constants.%int_2]
// CHECK:STDOUT: %.loc40: %tuple.type = tuple_literal (%int_1, %int_2)
// CHECK:STDOUT: %addr.loc40: %ptr.b50 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %int_5: Core.IntLiteral = int_value 5 [template = constants.%int_5]
// CHECK:STDOUT: %.loc45: %struct_type.a.a6c = struct_literal (%int_5)
// CHECK:STDOUT: %addr.loc45: %ptr.4e0 = addr_of <error> [template = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfOperator() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %true.loc53: bool = bool_literal true [template = constants.%true]
// CHECK:STDOUT: %false.loc53_10: bool = bool_literal false [template = constants.%false]
// CHECK:STDOUT: if %true.loc53 br !and.rhs else br !and.result(%false.loc53_10)
// CHECK:STDOUT:
// CHECK:STDOUT: !and.rhs:
// CHECK:STDOUT: %false.loc53_14: bool = bool_literal false [template = constants.%false]
// CHECK:STDOUT: br !and.result(%false.loc53_14)
// CHECK:STDOUT:
// CHECK:STDOUT: !and.result:
// CHECK:STDOUT: %.loc53: bool = block_arg !and.result [template = constants.%false]
// CHECK:STDOUT: %addr.loc53: %ptr.bb2 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %H.ref: %H.type = name_ref H, file.%H.decl [template = constants.%H]
// CHECK:STDOUT: %H.call: init %struct_type.a.ba9 = call %H.ref()
// CHECK:STDOUT: %.loc58_6.1: ref %struct_type.a.ba9 = temporary_storage
// CHECK:STDOUT: %.loc58_6.2: ref %struct_type.a.ba9 = temporary %.loc58_6.1, %H.call
// CHECK:STDOUT: %.loc58_7: ref %i32 = struct_access %.loc58_6.2, element0
// CHECK:STDOUT: %addr.loc58: %ptr.235 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %true.loc63: bool = bool_literal true [template = constants.%true]
// CHECK:STDOUT: %.loc63: bool = not %true.loc63 [template = constants.%false]
// CHECK:STDOUT: %addr.loc63: %ptr.bb2 = addr_of <error> [template = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfCall() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %G.ref: %G.type = name_ref G, file.%G.decl [template = constants.%G]
// CHECK:STDOUT: %G.call: init %i32 = call %G.ref()
// CHECK:STDOUT: %addr: %ptr.235 = addr_of <error> [template = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfType() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_32.loc79: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %i32.loc79: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT: %addr.loc79: %ptr.db7 = addr_of <error> [template = <error>]
// CHECK:STDOUT: %int_32.loc84: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %i32.loc84: type = class_type @Int, @Int(constants.%int_32) [template = constants.%i32]
// CHECK:STDOUT: %const: type = const_type %i32 [template = constants.%const]
// CHECK:STDOUT: %ptr: type = ptr_type %const [template = constants.%ptr.36b]
// CHECK:STDOUT: %addr.loc84: %ptr.db7 = addr_of <error> [template = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfTupleElementValue() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [template = constants.%int_1]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [template = constants.%int_2]
// CHECK:STDOUT: %.loc92_10.1: %tuple.type = tuple_literal (%int_1, %int_2)
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [template = constants.%int_0]
// CHECK:STDOUT: %tuple: %tuple.type = tuple_value (%int_1, %int_2) [template = constants.%tuple]
// CHECK:STDOUT: %.loc92_10.2: %tuple.type = converted %.loc92_10.1, %tuple [template = constants.%tuple]
// CHECK:STDOUT: %tuple.elem0: Core.IntLiteral = tuple_access %.loc92_10.2, element0 [template = constants.%int_1]
// CHECK:STDOUT: %addr: %ptr.1d1 = addr_of <error> [template = <error>]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @AddressOfParam(%param.param_patt: %i32) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %param_addr.var: ref %ptr.235 = var param_addr
// CHECK:STDOUT: %param_addr: ref %ptr.235 = bind_name param_addr, %param_addr.var
// CHECK:STDOUT: %param.ref: %i32 = name_ref param, %param
// CHECK:STDOUT: %addr: %ptr.235 = addr_of <error> [template = <error>]
// CHECK:STDOUT: assign %param_addr.var, %addr
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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