carbon-lang/toolchain/check/testdata/interop/cpp/function/variadic.carbon

// 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/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/function/variadic.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/variadic.carbon

// --- variadic.h

template<typename ...T>
auto foo(int, T...) -> void;

// --- call_variadic.carbon

library "[[@TEST_NAME]]";

import Cpp library "variadic.h";

fn Call1() {
  //@dump-sem-ir-begin
  Cpp.foo(1);
  //@dump-sem-ir-end
}

fn Call2() {
  //@dump-sem-ir-begin
  Cpp.foo(1, 2);
  //@dump-sem-ir-end
}

fn Call3() {
  //@dump-sem-ir-begin
  Cpp.foo(1, 2, 3);
  //@dump-sem-ir-end
}

// CHECK:STDOUT: --- call_variadic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.type: type = cpp_overload_set_type @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete]
// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %foo.type.a5abd1.1: type = fn_type @foo.1 [concrete]
// CHECK:STDOUT:   %foo.23ea43.1: %foo.type.a5abd1.1 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.d14: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT:   %ImplicitAs.Convert.type.1b6: type = fn_type @ImplicitAs.Convert, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT:   %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.412: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.740: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.412 = struct_value () [symbolic]
// CHECK:STDOUT:   %ImplicitAs.impl_witness.ec0: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.99e, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.84b: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.84b = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.d14 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.ec0) [concrete]
// CHECK:STDOUT:   %.d28: type = fn_type_with_self_type %ImplicitAs.Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.3d4: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0 [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method.d3a: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT:   %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT:   %foo.type.a5abd1.2: type = fn_type @foo.2 [concrete]
// CHECK:STDOUT:   %foo.23ea43.2: %foo.type.a5abd1.2 = struct_value () [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.c08: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0 [concrete]
// CHECK:STDOUT:   %bound_method.6f5: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_2.ef8: %i32 = int_value 2 [concrete]
// CHECK:STDOUT:   %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
// CHECK:STDOUT:   %foo.type.a5abd1.3: type = fn_type @foo.3 [concrete]
// CHECK:STDOUT:   %foo.23ea43.3: %foo.type.a5abd1.3 = struct_value () [concrete]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.ad4: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0 [concrete]
// CHECK:STDOUT:   %bound_method.7cb: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT:   %int_3.822: %i32 = int_value 3 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = %foo.cpp_overload_set.value
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %foo.cpp_overload_set.value: %foo.cpp_overload_set.type = cpp_overload_set_value @foo.cpp_overload_set [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %foo.decl.bd967b.1: %foo.type.a5abd1.1 = fn_decl @foo.1 [concrete = constants.%foo.23ea43.1] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import_ref.3e1: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.412) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.740)]
// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.99e = impl_witness_table (%Core.import_ref.3e1), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT:   %foo.decl.bd967b.2: %foo.type.a5abd1.2 = fn_decl @foo.2 [concrete = constants.%foo.23ea43.2] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %foo.decl.bd967b.3: %foo.type.a5abd1.3 = fn_decl @foo.3 [concrete = constants.%foo.23ea43.3] {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     <elided>
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call1() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:   %impl.elem0: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc8_11.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.3d4]
// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc8_11.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method.d3a]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call: init %i32 = call %bound_method.loc8_11.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc8_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc8_11.2: %i32 = converted %int_1, %.loc8_11.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call imports.%foo.decl.bd967b.1(%.loc8_11.2)
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call2() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// 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.loc14_11: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc14_11.1: <bound method> = bound_method %int_1, %impl.elem0.loc14_11 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.3d4]
// CHECK:STDOUT:   %specific_fn.loc14_11: <specific function> = specific_function %impl.elem0.loc14_11, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc14_11.2: <bound method> = bound_method %int_1, %specific_fn.loc14_11 [concrete = constants.%bound_method.d3a]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_11: init %i32 = call %bound_method.loc14_11.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc14_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_11 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc14_11.2: %i32 = converted %int_1, %.loc14_11.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %impl.elem0.loc14_14: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc14_14.1: <bound method> = bound_method %int_2, %impl.elem0.loc14_14 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.c08]
// CHECK:STDOUT:   %specific_fn.loc14_14: <specific function> = specific_function %impl.elem0.loc14_14, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc14_14.2: <bound method> = bound_method %int_2, %specific_fn.loc14_14 [concrete = constants.%bound_method.6f5]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_14: init %i32 = call %bound_method.loc14_14.2(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %.loc14_14.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc14_14 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %.loc14_14.2: %i32 = converted %int_2, %.loc14_14.1 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call imports.%foo.decl.bd967b.2(%.loc14_11.2, %.loc14_14.2)
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Call3() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: %foo.cpp_overload_set.type = name_ref foo, imports.%foo.cpp_overload_set.value [concrete = constants.%foo.cpp_overload_set.value]
// 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:   %int_3: Core.IntLiteral = int_value 3 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT:   %impl.elem0.loc20_11: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc20_11.1: <bound method> = bound_method %int_1, %impl.elem0.loc20_11 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.3d4]
// CHECK:STDOUT:   %specific_fn.loc20_11: <specific function> = specific_function %impl.elem0.loc20_11, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc20_11.2: <bound method> = bound_method %int_1, %specific_fn.loc20_11 [concrete = constants.%bound_method.d3a]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_11: init %i32 = call %bound_method.loc20_11.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc20_11.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_11 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %.loc20_11.2: %i32 = converted %int_1, %.loc20_11.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:   %impl.elem0.loc20_14: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc20_14.1: <bound method> = bound_method %int_2, %impl.elem0.loc20_14 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.c08]
// CHECK:STDOUT:   %specific_fn.loc20_14: <specific function> = specific_function %impl.elem0.loc20_14, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc20_14.2: <bound method> = bound_method %int_2, %specific_fn.loc20_14 [concrete = constants.%bound_method.6f5]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_14: init %i32 = call %bound_method.loc20_14.2(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %.loc20_14.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_14 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %.loc20_14.2: %i32 = converted %int_2, %.loc20_14.1 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:   %impl.elem0.loc20_17: %.d28 = impl_witness_access constants.%ImplicitAs.impl_witness.ec0, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f0]
// CHECK:STDOUT:   %bound_method.loc20_17.1: <bound method> = bound_method %int_3, %impl.elem0.loc20_17 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.ad4]
// CHECK:STDOUT:   %specific_fn.loc20_17: <specific function> = specific_function %impl.elem0.loc20_17, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT:   %bound_method.loc20_17.2: <bound method> = bound_method %int_3, %specific_fn.loc20_17 [concrete = constants.%bound_method.7cb]
// CHECK:STDOUT:   %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_17: init %i32 = call %bound_method.loc20_17.2(%int_3) [concrete = constants.%int_3.822]
// CHECK:STDOUT:   %.loc20_17.1: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc20_17 [concrete = constants.%int_3.822]
// CHECK:STDOUT:   %.loc20_17.2: %i32 = converted %int_3, %.loc20_17.1 [concrete = constants.%int_3.822]
// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call imports.%foo.decl.bd967b.3(%.loc20_11.2, %.loc20_14.2, %.loc20_17.2)
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: