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carbon-lang/toolchain/check/testdata/array/generic_empty.carbon
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Richard Smith 797b14eb8e Import ImplWitnessTable into the imports block instead of the constants block. (#5374) 
Don't import `ImplWitnessTable` into the `constants` block, because we
generally don't put `Unique` constants there. This matches the handling
of the other kinds of `Unique` constants. In order to keep the
instruction visible in formatted SemIR, add it to the `imports` block
instead.

Also fix a bug in the instruction formatter that resulted in
instructions in the `imports` block being omitted from the output if
they were only referenced by earlier instructions in the `imports` block
and by instructions in the `constants` block. This was already resulting
in some referenced instructions being omitted from the output, but also
occurred frequently for `impl_witness_table` instructions after this
change because it is common for the only reference to those instructions
to be from `impl_witness` instructions in the `constants` block.
2025-05-01 00:08:43 +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/array/generic_empty.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/array/generic_empty.carbon
fn G(T:! type) {
// We can initialize this without knowing T.
var arr: array(T, 0) = ();
}
fn H() {
G(i32);
}
// CHECK:STDOUT: --- generic_empty.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T: type = bind_symbolic_name T, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.98f: type = pattern_type type [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [concrete]
// CHECK:STDOUT: %array_type.281: type = array_type %int_0, %T [symbolic]
// CHECK:STDOUT: %require_complete.b7f: <witness> = require_complete_type %array_type.281 [symbolic]
// CHECK:STDOUT: %pattern_type.d48: type = pattern_type %array_type.281 [symbolic]
// CHECK:STDOUT: %array.2ed: %array_type.281 = tuple_value () [symbolic]
// CHECK:STDOUT: %H.type: type = fn_type @H [concrete]
// CHECK:STDOUT: %H: %H.type = struct_value () [concrete]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %G.specific_fn: <specific function> = specific_function %G, @G(%i32) [concrete]
// CHECK:STDOUT: %array_type.f5c: type = array_type %int_0, %i32 [concrete]
// CHECK:STDOUT: %complete_type.cff: <witness> = complete_type_witness %array_type.f5c [concrete]
// CHECK:STDOUT: %pattern_type.772: type = pattern_type %array_type.f5c [concrete]
// CHECK:STDOUT: %array.812: %array_type.f5c = tuple_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Int = %Core.Int
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: .H = %H.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %T.patt: %pattern_type.98f = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %T.loc11_6.1: type = bind_symbolic_name T, 0 [symbolic = %T.loc11_6.2 (constants.%T)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %H.decl: %H.type = fn_decl @H [concrete = constants.%H] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(%T.loc11_6.1: type) {
// CHECK:STDOUT: %T.loc11_6.2: type = bind_symbolic_name T, 0 [symbolic = %T.loc11_6.2 (constants.%T)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %array_type.loc13_22.2: type = array_type constants.%int_0, %T.loc11_6.2 [symbolic = %array_type.loc13_22.2 (constants.%array_type.281)]
// CHECK:STDOUT: %require_complete: <witness> = require_complete_type %array_type.loc13_22.2 [symbolic = %require_complete (constants.%require_complete.b7f)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %array_type.loc13_22.2 [symbolic = %pattern_type (constants.%pattern_type.d48)]
// CHECK:STDOUT: %array: @G.%array_type.loc13_22.2 (%array_type.281) = tuple_value () [symbolic = %array (constants.%array.2ed)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %arr.patt: @G.%pattern_type (%pattern_type.d48) = binding_pattern arr [concrete]
// CHECK:STDOUT: %.loc13_3.1: @G.%pattern_type (%pattern_type.d48) = var_pattern %arr.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr.var: ref @G.%array_type.loc13_22.2 (%array_type.281) = var arr
// CHECK:STDOUT: %.loc13_27.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT: %.loc13_27.2: init @G.%array_type.loc13_22.2 (%array_type.281) = array_init () to %arr.var [symbolic = %array (constants.%array.2ed)]
// CHECK:STDOUT: %.loc13_3.2: init @G.%array_type.loc13_22.2 (%array_type.281) = converted %.loc13_27.1, %.loc13_27.2 [symbolic = %array (constants.%array.2ed)]
// CHECK:STDOUT: assign %arr.var, %.loc13_3.2
// CHECK:STDOUT: %.loc13_22: type = splice_block %array_type.loc13_22.1 [symbolic = %array_type.loc13_22.2 (constants.%array_type.281)] {
// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc11_6.1 [symbolic = %T.loc11_6.2 (constants.%T)]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT: %array_type.loc13_22.1: type = array_type %int_0, %T.ref [symbolic = %array_type.loc13_22.2 (constants.%array_type.281)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr: ref @G.%array_type.loc13_22.2 (%array_type.281) = bind_name arr, %arr.var
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @H() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %G.ref: %G.type = name_ref G, file.%G.decl [concrete = constants.%G]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %G.specific_fn: <specific function> = specific_function %G.ref, @G(constants.%i32) [concrete = constants.%G.specific_fn]
// CHECK:STDOUT: %G.call: init %empty_tuple.type = call %G.specific_fn()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%T) {
// CHECK:STDOUT: %T.loc11_6.2 => constants.%T
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%i32) {
// CHECK:STDOUT: %T.loc11_6.2 => constants.%i32
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %array_type.loc13_22.2 => constants.%array_type.f5c
// CHECK:STDOUT: %require_complete => constants.%complete_type.cff
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.772
// CHECK:STDOUT: %array => constants.%array.812
// CHECK:STDOUT: }
// CHECK:STDOUT:
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