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carbon-lang/toolchain/check/testdata/function/builtin/call.carbon
T
Dana JansensandRichard Smith 0e8d354567 Split the witness table into a separate ImplWitnessTable instruction (#5272) 
This allows us to import the table for a given impl only once, while we
can import many ImplWitness instructions with different specifics for a
generic impl.

For example in convert_facet_value_to_narrowed_facet_type.carbon we see
that a single witness table is imported for the BitAnd interface, with
multiple witnesses (for different specifics) imported and sharing the
same table.

The ImplWitnessTable now contains a back-link to the Impl the witness is
for, allowing inst namer to name that interface in the textual semir,
and allowing the interface to be found when debugging from a witness.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2025-04-11 20:30:04 +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/function/builtin/call.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/builtin/call.carbon
fn Add(a: i32, b: i32) -> i32 = "int.sadd";
var arr: array(i32, Add(1, 2));
fn RuntimeCall(a: i32, b: i32) -> i32 {
return Add(a, b);
}
// CHECK:STDOUT: --- call.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %Add.type.b1f: type = fn_type @Add.1 [concrete]
// CHECK:STDOUT: %Add: %Add.type.b1f = struct_value () [concrete]
// CHECK:STDOUT: %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT: %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %ImplicitAs.type.205: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT: %Convert.type.1b6: type = fn_type @Convert.1, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.a2f = impl_witness_table (imports.%Core.import_ref.a5b), @impl.4f9 [concrete]
// CHECK:STDOUT: %ImplicitAs.type.2fd: type = facet_type <@ImplicitAs, @ImplicitAs(Core.IntLiteral)> [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.1d9 = impl_witness_table (imports.%Core.import_ref.85c), @impl.971 [concrete]
// CHECK:STDOUT: %Convert.type.71e: type = fn_type @Convert.1, @ImplicitAs(Core.IntLiteral) [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.c75: <witness> = impl_witness %ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT: %Convert.type.035: type = fn_type @Convert.2, @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT: %Convert.956: %Convert.type.035 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.921: %ImplicitAs.type.205 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.c75) [concrete]
// CHECK:STDOUT: %.9c3: type = fn_type_with_self_type %Convert.type.1b6, %ImplicitAs.facet.921 [concrete]
// CHECK:STDOUT: %Convert.bound.ab5: <bound method> = bound_method %int_1.5b8, %Convert.956 [concrete]
// CHECK:STDOUT: %Convert.specific_fn.b6f: <specific function> = specific_function %Convert.956, @Convert.2(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.9a1: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn.b6f [concrete]
// CHECK:STDOUT: %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT: %Convert.bound.ef9: <bound method> = bound_method %int_2.ecc, %Convert.956 [concrete]
// CHECK:STDOUT: %bound_method.b92: <bound method> = bound_method %int_2.ecc, %Convert.specific_fn.b6f [concrete]
// CHECK:STDOUT: %int_2.ef8: %i32 = int_value 2 [concrete]
// CHECK:STDOUT: %int_3.822: %i32 = int_value 3 [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.a11: <witness> = impl_witness %ImplicitAs.impl_witness_table.1d9, @impl.971(%int_32) [concrete]
// CHECK:STDOUT: %Convert.type.4ad: type = fn_type @Convert.3, @impl.971(%int_32) [concrete]
// CHECK:STDOUT: %Convert.960: %Convert.type.4ad = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.f49: %ImplicitAs.type.2fd = facet_value %i32, (%ImplicitAs.impl_witness.a11) [concrete]
// CHECK:STDOUT: %.0ea: type = fn_type_with_self_type %Convert.type.71e, %ImplicitAs.facet.f49 [concrete]
// CHECK:STDOUT: %Convert.bound.2d6: <bound method> = bound_method %int_3.822, %Convert.960 [concrete]
// CHECK:STDOUT: %Convert.specific_fn.8a8: <specific function> = specific_function %Convert.960, @Convert.3(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.c6f: <bound method> = bound_method %int_3.822, %Convert.specific_fn.8a8 [concrete]
// CHECK:STDOUT: %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
// CHECK:STDOUT: %array_type: type = array_type %int_3.1ba, %i32 [concrete]
// CHECK:STDOUT: %RuntimeCall.type: type = fn_type @RuntimeCall [concrete]
// CHECK:STDOUT: %RuntimeCall: %RuntimeCall.type = struct_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: .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Add = %Add.decl
// CHECK:STDOUT: .arr = %arr
// CHECK:STDOUT: .RuntimeCall = %RuntimeCall.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Add.decl: %Add.type.b1f = fn_decl @Add.1 [concrete = constants.%Add] {
// CHECK:STDOUT: %a.patt: %i32 = binding_pattern a
// CHECK:STDOUT: %a.param_patt: %i32 = value_param_pattern %a.patt, call_param0
// CHECK:STDOUT: %b.patt: %i32 = binding_pattern b
// CHECK:STDOUT: %b.param_patt: %i32 = value_param_pattern %b.patt, call_param1
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, call_param2
// CHECK:STDOUT: } {
// CHECK:STDOUT: %int_32.loc11_27: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc11_27: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %a.param: %i32 = value_param call_param0
// CHECK:STDOUT: %.loc11_11: type = splice_block %i32.loc11_11 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc11_11: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc11_11: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %i32 = bind_name a, %a.param
// CHECK:STDOUT: %b.param: %i32 = value_param call_param1
// CHECK:STDOUT: %.loc11_19: type = splice_block %i32.loc11_19 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc11_19: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc11_19: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %i32 = bind_name b, %b.param
// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param2
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %arr.patt: %array_type = binding_pattern arr
// CHECK:STDOUT: %.loc13_1: %array_type = var_pattern %arr.patt
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr.var: ref %array_type = var arr
// CHECK:STDOUT: %.loc13_30: type = splice_block %array_type [concrete = constants.%array_type] {
// 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: %Add.ref: %Add.type.b1f = name_ref Add, %Add.decl [concrete = constants.%Add]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT: %impl.elem0.loc13_25: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT: %bound_method.loc13_25.1: <bound method> = bound_method %int_1, %impl.elem0.loc13_25 [concrete = constants.%Convert.bound.ab5]
// CHECK:STDOUT: %specific_fn.loc13_25: <specific function> = specific_function %impl.elem0.loc13_25, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn.b6f]
// CHECK:STDOUT: %bound_method.loc13_25.2: <bound method> = bound_method %int_1, %specific_fn.loc13_25 [concrete = constants.%bound_method.9a1]
// CHECK:STDOUT: %int.convert_checked.loc13_25: init %i32 = call %bound_method.loc13_25.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc13_25.1: %i32 = value_of_initializer %int.convert_checked.loc13_25 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc13_25.2: %i32 = converted %int_1, %.loc13_25.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %impl.elem0.loc13_28: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT: %bound_method.loc13_28.1: <bound method> = bound_method %int_2, %impl.elem0.loc13_28 [concrete = constants.%Convert.bound.ef9]
// CHECK:STDOUT: %specific_fn.loc13_28: <specific function> = specific_function %impl.elem0.loc13_28, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn.b6f]
// CHECK:STDOUT: %bound_method.loc13_28.2: <bound method> = bound_method %int_2, %specific_fn.loc13_28 [concrete = constants.%bound_method.b92]
// CHECK:STDOUT: %int.convert_checked.loc13_28: init %i32 = call %bound_method.loc13_28.2(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc13_28.1: %i32 = value_of_initializer %int.convert_checked.loc13_28 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc13_28.2: %i32 = converted %int_2, %.loc13_28.1 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %int.sadd: init %i32 = call %Add.ref(%.loc13_25.2, %.loc13_28.2) [concrete = constants.%int_3.822]
// CHECK:STDOUT: %impl.elem0.loc13_29: %.0ea = impl_witness_access constants.%ImplicitAs.impl_witness.a11, element0 [concrete = constants.%Convert.960]
// CHECK:STDOUT: %bound_method.loc13_29.1: <bound method> = bound_method %int.sadd, %impl.elem0.loc13_29 [concrete = constants.%Convert.bound.2d6]
// CHECK:STDOUT: %specific_fn.loc13_29: <specific function> = specific_function %impl.elem0.loc13_29, @Convert.3(constants.%int_32) [concrete = constants.%Convert.specific_fn.8a8]
// CHECK:STDOUT: %bound_method.loc13_29.2: <bound method> = bound_method %int.sadd, %specific_fn.loc13_29 [concrete = constants.%bound_method.c6f]
// CHECK:STDOUT: %.loc13_29.1: %i32 = value_of_initializer %int.sadd [concrete = constants.%int_3.822]
// CHECK:STDOUT: %.loc13_29.2: %i32 = converted %int.sadd, %.loc13_29.1 [concrete = constants.%int_3.822]
// CHECK:STDOUT: %int.convert_checked.loc13_29: init Core.IntLiteral = call %bound_method.loc13_29.2(%.loc13_29.2) [concrete = constants.%int_3.1ba]
// CHECK:STDOUT: %.loc13_29.3: Core.IntLiteral = value_of_initializer %int.convert_checked.loc13_29 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT: %.loc13_29.4: Core.IntLiteral = converted %int.sadd, %.loc13_29.3 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT: %array_type: type = array_type %.loc13_29.4, %i32 [concrete = constants.%array_type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr: ref %array_type = bind_name arr, %arr.var
// CHECK:STDOUT: %RuntimeCall.decl: %RuntimeCall.type = fn_decl @RuntimeCall [concrete = constants.%RuntimeCall] {
// CHECK:STDOUT: %a.patt: %i32 = binding_pattern a
// CHECK:STDOUT: %a.param_patt: %i32 = value_param_pattern %a.patt, call_param0
// CHECK:STDOUT: %b.patt: %i32 = binding_pattern b
// CHECK:STDOUT: %b.param_patt: %i32 = value_param_pattern %b.patt, call_param1
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, call_param2
// CHECK:STDOUT: } {
// CHECK:STDOUT: %int_32.loc15_35: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_35: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %a.param: %i32 = value_param call_param0
// CHECK:STDOUT: %.loc15_19: type = splice_block %i32.loc15_19 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_19: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_19: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %i32 = bind_name a, %a.param
// CHECK:STDOUT: %b.param: %i32 = value_param call_param1
// CHECK:STDOUT: %.loc15_27: type = splice_block %i32.loc15_27 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_27: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_27: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %i32 = bind_name b, %b.param
// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param2
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Add.1(%a.param_patt: %i32, %b.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @RuntimeCall(%a.param_patt: %i32, %b.param_patt: %i32) -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Add.ref: %Add.type.b1f = name_ref Add, file.%Add.decl [concrete = constants.%Add]
// CHECK:STDOUT: %a.ref: %i32 = name_ref a, %a
// CHECK:STDOUT: %b.ref: %i32 = name_ref b, %b
// CHECK:STDOUT: %int.sadd: init %i32 = call %Add.ref(%a.ref, %b.ref)
// CHECK:STDOUT: %.loc16_19.1: %i32 = value_of_initializer %int.sadd
// CHECK:STDOUT: %.loc16_19.2: %i32 = converted %int.sadd, %.loc16_19.1
// CHECK:STDOUT: return %.loc16_19.2
// CHECK:STDOUT: }
// CHECK:STDOUT:
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