mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 15:11:07 +01:00
Richard Smith
5b884ae14d
- Track the `VarPattern` instruction on the `VarStorage` instruction so that it's available for name mangling. - Mangle global variables based on the first binding name within their pattern. - Give global variables external rather than internal linkage, except if they have no bindings whatsoever in their pattern. - To support lowering references to bindings nested within a global var, such as for `var (x: i32, b: i32)`, add some basic initial support for reference constant expressions. Treat a global `var` as a reference constant, and treat an aggregate access into a reference constant as a reference constant.
130 lines
8.1 KiB
Plaintext
130 lines
8.1 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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// 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/if/fail_scope.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/if/fail_scope.carbon
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fn VarScope(b: bool) -> i32 {
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if (b) {
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var n: i32 = 2;
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return n;
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}
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// CHECK:STDERR: fail_scope.carbon:[[@LINE+4]]:10: error: name `n` not found [NameNotFound]
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// CHECK:STDERR: return n;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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return n;
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}
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// CHECK:STDOUT: --- fail_scope.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [concrete]
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// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [concrete]
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// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
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// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
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// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
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// CHECK:STDOUT: %pattern_type.7ce: type = pattern_type %i32 [concrete]
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// CHECK:STDOUT: %VarScope.type: type = fn_type @VarScope [concrete]
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// CHECK:STDOUT: %VarScope: %VarScope.type = struct_value () [concrete]
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// CHECK:STDOUT: %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
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// CHECK:STDOUT: %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
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// CHECK:STDOUT: %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
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// CHECK:STDOUT: %ImplicitAs.type.205: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
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// CHECK:STDOUT: %Convert.type.1b6: type = fn_type @Convert.1, @ImplicitAs(%i32) [concrete]
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// CHECK:STDOUT: %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
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// CHECK:STDOUT: %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
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// CHECK:STDOUT: %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
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// CHECK:STDOUT: %ImplicitAs.impl_witness.c75: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_32) [concrete]
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// CHECK:STDOUT: %Convert.type.035: type = fn_type @Convert.2, @impl.4f9(%int_32) [concrete]
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// CHECK:STDOUT: %Convert.956: %Convert.type.035 = struct_value () [concrete]
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// CHECK:STDOUT: %ImplicitAs.facet: %ImplicitAs.type.205 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.c75) [concrete]
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// CHECK:STDOUT: %.9c3: type = fn_type_with_self_type %Convert.type.1b6, %ImplicitAs.facet [concrete]
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// CHECK:STDOUT: %Convert.bound: <bound method> = bound_method %int_2.ecc, %Convert.956 [concrete]
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// CHECK:STDOUT: %Convert.specific_fn: <specific function> = specific_function %Convert.956, @Convert.2(%int_32) [concrete]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %int_2.ecc, %Convert.specific_fn [concrete]
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// CHECK:STDOUT: %int_2.ef8: %i32 = int_value 2 [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
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// CHECK:STDOUT: .Bool = %Core.Bool
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// CHECK:STDOUT: .Int = %Core.Int
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// CHECK:STDOUT: .ImplicitAs = %Core.ImplicitAs
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.Bool: %Bool.type = import_ref Core//prelude/types/bool, Bool, loaded [concrete = constants.%Bool]
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// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
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// CHECK:STDOUT: %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
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// CHECK:STDOUT: %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
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// CHECK:STDOUT: %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
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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 [concrete] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .VarScope = %VarScope.decl
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// CHECK:STDOUT: .n = <poisoned>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %VarScope.decl: %VarScope.type = fn_decl @VarScope [concrete = constants.%VarScope] {
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// CHECK:STDOUT: %b.patt: %pattern_type.831 = binding_pattern b [concrete]
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// CHECK:STDOUT: %b.param_patt: %pattern_type.831 = value_param_pattern %b.patt, call_param0 [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.7ce = return_slot_pattern [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.7ce = out_param_pattern %return.patt, call_param1 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %int_32.loc11: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
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// CHECK:STDOUT: %i32.loc11: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
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// CHECK:STDOUT: %b.param: bool = value_param call_param0
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// CHECK:STDOUT: %.loc11_16.1: type = splice_block %.loc11_16.3 [concrete = bool] {
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// CHECK:STDOUT: %bool.make_type: init type = call constants.%Bool() [concrete = bool]
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// CHECK:STDOUT: %.loc11_16.2: type = value_of_initializer %bool.make_type [concrete = bool]
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// CHECK:STDOUT: %.loc11_16.3: type = converted %bool.make_type, %.loc11_16.2 [concrete = bool]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %b: bool = bind_name b, %b.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param1
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @VarScope(%b.param: bool) -> %i32 {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
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// CHECK:STDOUT: if %b.ref br !if.then else br !if.else
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.then:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %n.patt: %pattern_type.7ce = binding_pattern n [concrete]
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// CHECK:STDOUT: %n.var_patt: %pattern_type.7ce = var_pattern %n.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %n.var: ref %i32 = var %n.var_patt
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// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
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// CHECK:STDOUT: %impl.elem0: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
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// CHECK:STDOUT: %bound_method.loc13_5.1: <bound method> = bound_method %int_2, %impl.elem0 [concrete = constants.%Convert.bound]
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// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn]
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// CHECK:STDOUT: %bound_method.loc13_5.2: <bound method> = bound_method %int_2, %specific_fn [concrete = constants.%bound_method]
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// CHECK:STDOUT: %int.convert_checked: init %i32 = call %bound_method.loc13_5.2(%int_2) [concrete = constants.%int_2.ef8]
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// CHECK:STDOUT: %.loc13_5: init %i32 = converted %int_2, %int.convert_checked [concrete = constants.%int_2.ef8]
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// CHECK:STDOUT: assign %n.var, %.loc13_5
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// CHECK:STDOUT: %.loc13_12: type = splice_block %i32.loc13 [concrete = constants.%i32] {
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// CHECK:STDOUT: %int_32.loc13: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
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// CHECK:STDOUT: %i32.loc13: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %n: ref %i32 = bind_name n, %n.var
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// CHECK:STDOUT: %n.ref.loc14: ref %i32 = name_ref n, %n
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// CHECK:STDOUT: %.loc14: %i32 = bind_value %n.ref.loc14
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// CHECK:STDOUT: return %.loc14
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// CHECK:STDOUT:
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// CHECK:STDOUT: !if.else:
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// CHECK:STDOUT: %n.ref.loc20: <error> = name_ref n, <error> [concrete = <error>]
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// CHECK:STDOUT: return <error>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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