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carbon-lang/toolchain/check/testdata/function/declaration/fail_redecl.carbon
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Geoff RomerandDana Jansens e67b6db910 Give files shorthand names in textual SemIR (#8104) 
Shorthand names are intended to be used in the textual format of
references to instructions in another IR (which can't happen now, but
will be possible in a forthcoming PR). The shorthand name uses the file
name (minus the `.carbon` suffix) as a base, and if that base name is
ambiguous within the compilation, it is given a numerical suffix `.N`,
just like other textual IR names. Shorthand names are prefixed with `$`
in the textual format, to distinguish them from inst and scope names.

For example, a file `foo/bar.carbon` has the shorthand name `$bar`, and
an instruction `@baz.%qux` in that file can be referenced from another
file as `$bar.@baz.%qux`.

This PR adds `toolchain/check/testdata/basics/file_name.carbon` to test
this behavior. All other test changes are just applying this change to
the existing textual SemIR dumps.

---------

Co-authored-by: Dana Jansens <danakj@orodu.net>
2026-11-12 23:34:32 +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/none.carbon
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/declaration/fail_redecl.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/declaration/fail_redecl.carbon
fn A();
// CHECK:STDERR: ╭─┤ fail_redecl.carbon:[[@LINE+10]]:1
// CHECK:STDERR: │ fn A();
// CHECK:STDERR: · ───┬───
// CHECK:STDERR: · ╰──┤ previously declared here [RedeclPrevDecl]
// CHECK:STDERR: ┆
// CHECK:STDERR: -> │ fn A();
// CHECK:STDERR: · ━━━┳━━━
// CHECK:STDERR: · ┗━━┫ error: redeclaration of `fn A` is redundant [RedeclRedundant]
// CHECK:STDERR: ╰────
// CHECK:STDERR:
fn A();
fn B(x: ());
// CHECK:STDERR: ╭─┤ fail_redecl.carbon:[[@LINE+10]]:1
// CHECK:STDERR: │ fn B(x: ());
// CHECK:STDERR: · ──────┬─────
// CHECK:STDERR: · ╰──┤ previously declared here [RedeclPrevDecl]
// CHECK:STDERR: ┆
// CHECK:STDERR: -> │ fn B(x: ());
// CHECK:STDERR: · ━━━━━━┳━━━━━
// CHECK:STDERR: · ┗━━┫ error: redeclaration of `fn B` is redundant [RedeclRedundant]
// CHECK:STDERR: ╰────
// CHECK:STDERR:
fn B(x: ());
fn C();
// CHECK:STDERR: ╭─┤ fail_redecl.carbon:[[@LINE+11]]:1
// CHECK:STDERR: │ fn C();
// CHECK:STDERR: · ───┬───
// CHECK:STDERR: · ╰──┤ previously declared with parameter count of 0 [RedeclParamCountPrevious]
// CHECK:STDERR: ┆
// CHECK:STDERR: -> │ fn C(x: ());
// CHECK:STDERR: · ━━━━━━┳━━━━━
// CHECK:STDERR: · ┗━━┫ error: redeclaration differs because of parameter count of 1
// CHECK:STDERR: · ┃ [RedeclParamCountDiffers]
// CHECK:STDERR: ╰────
// CHECK:STDERR:
fn C(x: ());
fn D() {}
// CHECK:STDERR: ╭─┤ fail_redecl.carbon:[[@LINE+10]]:1
// CHECK:STDERR: │ fn D() {}
// CHECK:STDERR: · ────┬───
// CHECK:STDERR: · ╰──┤ previously declared here [RedeclPrevDecl]
// CHECK:STDERR: ┆
// CHECK:STDERR: -> │ fn D();
// CHECK:STDERR: · ━━━┳━━━
// CHECK:STDERR: · ┗━━┫ error: redeclaration of `fn D` is redundant [RedeclRedundant]
// CHECK:STDERR: ╰────
// CHECK:STDERR:
fn D();
fn E() {}
// CHECK:STDERR: ╭─┤ fail_redecl.carbon:[[@LINE+10]]:1
// CHECK:STDERR: │ fn E() {}
// CHECK:STDERR: · ────┬───
// CHECK:STDERR: · ╰──┤ previously defined here [RedeclPrevDef]
// CHECK:STDERR: ┆
// CHECK:STDERR: -> │ fn E() {}
// CHECK:STDERR: · ━━━━┳━━━
// CHECK:STDERR: · ┗━━┫ error: redefinition of `fn E` [RedeclRedef]
// CHECK:STDERR: ╰────
// CHECK:STDERR:
fn E() {}
// CHECK:STDOUT: --- fail_redecl.carbon = $fail_redecl
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern [concrete]
// CHECK:STDOUT: %x.patt: %pattern_type = wrapper_binding_pattern x, %x.param_patt [concrete]
// CHECK:STDOUT: %B.type: type = fn_type @B [concrete]
// CHECK:STDOUT: %B: %B.type = struct_value () [concrete]
// CHECK:STDOUT: %C.type.322e3b.1: type = fn_type @C.loc41 [concrete]
// CHECK:STDOUT: %C.010386.1: %C.type.322e3b.1 = struct_value () [concrete]
// CHECK:STDOUT: %C.type.322e3b.2: type = fn_type @C.loc53 [concrete]
// CHECK:STDOUT: %C.010386.2: %C.type.322e3b.2 = struct_value () [concrete]
// CHECK:STDOUT: %D.type: type = fn_type @D [concrete]
// CHECK:STDOUT: %D: %D.type = struct_value () [concrete]
// CHECK:STDOUT: %E.type.53e05b.1: type = fn_type @E.loc68 [concrete]
// CHECK:STDOUT: %E.3f2512.1: %E.type.53e05b.1 = struct_value () [concrete]
// CHECK:STDOUT: %E.type.53e05b.2: type = fn_type @E.loc79 [concrete]
// CHECK:STDOUT: %E.3f2512.2: %E.type.53e05b.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .A = %A.decl.loc15
// CHECK:STDOUT: .B = %B.decl.loc28
// CHECK:STDOUT: .C = %C.decl.loc41
// CHECK:STDOUT: .D = %D.decl.loc55
// CHECK:STDOUT: .E = %E.decl.loc68
// CHECK:STDOUT: }
// CHECK:STDOUT: %A.decl.loc15: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: %A.decl.loc26: %A.type = fn_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: %B.decl.loc28: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern [concrete = constants.%x.param_patt]
// CHECK:STDOUT: %x.patt: %pattern_type = wrapper_binding_pattern x, %x.param_patt [concrete = constants.%x.patt]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param.loc28: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc28_10.1: type = splice_block %.loc28_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc28_10.2: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc28_10.3: type = converted %.loc28_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.loc28: %empty_tuple.type = wrapper_binding x, %x.param.loc28
// CHECK:STDOUT: }
// CHECK:STDOUT: %B.decl.loc39: %B.type = fn_decl @B [concrete = constants.%B] {
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern [concrete = constants.%x.param_patt]
// CHECK:STDOUT: %x.patt: %pattern_type = wrapper_binding_pattern x, %x.param_patt [concrete = constants.%x.patt]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param.loc39: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc39_10.1: type = splice_block %.loc39_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc39_10.2: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc39_10.3: type = converted %.loc39_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x.loc39: %empty_tuple.type = wrapper_binding x, %x.param.loc39
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl.loc41: %C.type.322e3b.1 = fn_decl @C.loc41 [concrete = constants.%C.010386.1] {} {}
// CHECK:STDOUT: %C.decl.loc53: %C.type.322e3b.2 = fn_decl @C.loc53 [concrete = constants.%C.010386.2] {
// CHECK:STDOUT: %x.param_patt: %pattern_type = value_param_pattern [concrete = constants.%x.param_patt]
// CHECK:STDOUT: %x.patt: %pattern_type = wrapper_binding_pattern x, %x.param_patt [concrete = constants.%x.patt]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %x.param: %empty_tuple.type = value_param call_param0
// CHECK:STDOUT: %.loc53_10.1: type = splice_block %.loc53_10.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.loc53_10.2: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc53_10.3: type = converted %.loc53_10.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %x: %empty_tuple.type = wrapper_binding x, %x.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %D.decl.loc55: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: %D.decl.loc66: %D.type = fn_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: %E.decl.loc68: %E.type.53e05b.1 = fn_decl @E.loc68 [concrete = constants.%E.3f2512.1] {} {}
// CHECK:STDOUT: %E.decl.loc79: %E.type.53e05b.2 = fn_decl @E.loc79 [concrete = constants.%E.3f2512.2] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A();
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B(%x.param.loc28: %empty_tuple.type);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.loc41();
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.loc53(%x.param: %empty_tuple.type);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @D() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @E.loc68() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @E.loc79() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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