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carbon-lang/toolchain/check/testdata/impl/import_builtin_call.carbon
T
Geoff RomerandRichard Smith e023f75254 Implement thunking in terms of constant evaluation (#7332) 
The bulk of this change is changing most pattern insts to be `Always`
rather than `AlwaysUnique` constants, so that they can be wrapped in
`SpecificConstant`s to perform substitution. That then lets thunking
rely much more on `SpecificConstant` wrappers instead of deep-copying
the inst tree with modified types.

This approach to thunking should scale better, particularly as things
like form generics make function signatures more complex, because we can
leverage the existing support for constant evaluation and substitution.
Unfortunately, applying this approach to binding patterns will require
more work; see the TODO near the top of `thunk.cpp` for details.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2026-06-13 00:22:00 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/import_builtin_call.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/import_builtin_call.carbon
// --- int_literal.carbon
library "[[@TEST_NAME]]";
fn MakeIntLiteral() -> type = "int_literal.make_type";
alias IntLiteral = MakeIntLiteral();
// --- generic_impl.carbon
library "[[@TEST_NAME]]";
import library "int_literal";
interface Add {
fn Op(self, other: Self) -> Self;
}
fn Int(n: IntLiteral) -> type = "int.make_type_signed";
class MyInt(N:! IntLiteral) {
adapt Int(N);
}
impl forall [N:! IntLiteral] MyInt(N) as Add {
fn Op(self, other: Self) -> Self = "int.sadd";
}
fn Double[N:! IntLiteral](x: MyInt(N)) -> MyInt(N) {
return x.(Add.Op)(x);
}
// --- use_generic_impl.carbon
library "[[@TEST_NAME]]";
import library "generic_impl";
fn CallImportedDouble(n: MyInt(64)) -> MyInt(64) {
//@dump-sem-ir-begin
return Double(n);
//@dump-sem-ir-end
}
// --- convert_symbolic.carbon
library "[[@TEST_NAME]]";
import library "int_literal";
fn Int(n: IntLiteral) -> type = "int.make_type_signed";
fn ToLiteral(n: Int(32)) -> IntLiteral = "int.convert_checked";
fn FromLiteral(n: IntLiteral) -> Int(32) = "int.convert_checked";
fn Make(N:! Int(32)) -> Int(ToLiteral(N)) { return Make(N); }
class OtherInt {
adapt Int(32);
fn ToLiteral(self) -> IntLiteral;
};
fn OtherInt.ToLiteral(self) -> IntLiteral = "int.convert_checked";
fn MakeFromClass(N:! OtherInt) -> Int(N.ToLiteral()) { return MakeFromClass(N); }
// --- use_convert_symbolic.carbon
library "[[@TEST_NAME]]";
import library "convert_symbolic";
//@dump-sem-ir-begin
var m: Int(64) = Make(FromLiteral(64));
var n: Int(64) = MakeFromClass(FromLiteral(64) as OtherInt);
//@dump-sem-ir-end
// CHECK:STDOUT: --- use_generic_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_64: Core.IntLiteral = int_value 64 [concrete]
// CHECK:STDOUT: %MyInt.9fc: type = class_type @MyInt, @MyInt(%int_64) [concrete]
// CHECK:STDOUT: %Double.type: type = fn_type @Double [concrete]
// CHECK:STDOUT: %Double: %Double.type = struct_value () [concrete]
// CHECK:STDOUT: %Double.specific_fn: <specific function> = specific_function %Double, @Double(%int_64) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.Double: %Double.type = import_ref Main//generic_impl, Double, loaded [concrete = constants.%Double]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @CallImportedDouble(%n.param: %MyInt.9fc) -> out %return.param: %MyInt.9fc {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Double.ref: %Double.type = name_ref Double, imports.%Main.Double [concrete = constants.%Double]
// CHECK:STDOUT: %n.ref: %MyInt.9fc = name_ref n, %n
// CHECK:STDOUT: %Double.specific_fn: <specific function> = specific_function %Double.ref, @Double(constants.%int_64) [concrete = constants.%Double.specific_fn]
// CHECK:STDOUT: %Double.call: init %MyInt.9fc = call %Double.specific_fn(%n.ref)
// CHECK:STDOUT: return %Double.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- use_convert_symbolic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Int.type: type = fn_type @Int [concrete]
// CHECK:STDOUT: %Int: %Int.type = struct_value () [concrete]
// CHECK:STDOUT: %int_64.fab: Core.IntLiteral = int_value 64 [concrete]
// CHECK:STDOUT: %i64.builtin: type = int_type signed, %int_64.fab [concrete]
// CHECK:STDOUT: %pattern_type.e13: type = pattern_type %i64.builtin [concrete]
// CHECK:STDOUT: %m.patt: %pattern_type.e13 = ref_binding_pattern m [concrete]
// CHECK:STDOUT: %m.var_patt: %pattern_type.e13 = var_pattern %m.patt [concrete]
// CHECK:STDOUT: %Make.type: type = fn_type @Make [concrete]
// CHECK:STDOUT: %Make: %Make.type = struct_value () [concrete]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32.builtin: type = int_type signed, %int_32 [concrete]
// CHECK:STDOUT: %FromLiteral.type: type = fn_type @FromLiteral [concrete]
// CHECK:STDOUT: %FromLiteral: %FromLiteral.type = struct_value () [concrete]
// CHECK:STDOUT: %int_64.f82: %i32.builtin = int_value 64 [concrete]
// CHECK:STDOUT: %Make.specific_fn.bb3: <specific function> = specific_function %Make, @Make(%int_64.f82) [concrete]
// CHECK:STDOUT: %n.patt.914: %pattern_type.e13 = ref_binding_pattern n [concrete]
// CHECK:STDOUT: %n.var_patt: %pattern_type.e13 = var_pattern %n.patt.914 [concrete]
// CHECK:STDOUT: %MakeFromClass.type: type = fn_type @MakeFromClass [concrete]
// CHECK:STDOUT: %MakeFromClass: %MakeFromClass.type = struct_value () [concrete]
// CHECK:STDOUT: %OtherInt: type = class_type @OtherInt [concrete]
// CHECK:STDOUT: %int_64.420: %OtherInt = int_value 64 [concrete]
// CHECK:STDOUT: %MakeFromClass.specific_fn.3a7: <specific function> = specific_function %MakeFromClass, @MakeFromClass(%int_64.420) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.Int: %Int.type = import_ref Main//convert_symbolic, Int, loaded [concrete = constants.%Int]
// CHECK:STDOUT: %Main.FromLiteral: %FromLiteral.type = import_ref Main//convert_symbolic, FromLiteral, loaded [concrete = constants.%FromLiteral]
// CHECK:STDOUT: %Main.Make: %Make.type = import_ref Main//convert_symbolic, Make, loaded [concrete = constants.%Make]
// CHECK:STDOUT: %Main.OtherInt: type = import_ref Main//convert_symbolic, OtherInt, loaded [concrete = constants.%OtherInt]
// CHECK:STDOUT: %Main.MakeFromClass: %MakeFromClass.type = import_ref Main//convert_symbolic, MakeFromClass, loaded [concrete = constants.%MakeFromClass]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %m.patt: %pattern_type.e13 = ref_binding_pattern m [concrete = constants.%m.patt]
// CHECK:STDOUT: %m.var_patt: %pattern_type.e13 = var_pattern %m.patt [concrete = constants.%m.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %m.var: ref %i64.builtin = var %m.var_patt [concrete]
// CHECK:STDOUT: %.loc7_14.1: type = splice_block %.loc7_14.3 [concrete = constants.%i64.builtin] {
// CHECK:STDOUT: %Int.ref.loc7: %Int.type = name_ref Int, imports.%Main.Int [concrete = constants.%Int]
// CHECK:STDOUT: %int_64.loc7: Core.IntLiteral = int_value 64 [concrete = constants.%int_64.fab]
// CHECK:STDOUT: %Int.call.loc7: init type = call %Int.ref.loc7(%int_64.loc7) [concrete = constants.%i64.builtin]
// CHECK:STDOUT: %.loc7_14.2: type = value_of_initializer %Int.call.loc7 [concrete = constants.%i64.builtin]
// CHECK:STDOUT: %.loc7_14.3: type = converted %Int.call.loc7, %.loc7_14.2 [concrete = constants.%i64.builtin]
// CHECK:STDOUT: }
// CHECK:STDOUT: %m: ref %i64.builtin = ref_binding m, %m.var [concrete = %m.var]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %n.patt: %pattern_type.e13 = ref_binding_pattern n [concrete = constants.%n.patt.914]
// CHECK:STDOUT: %n.var_patt: %pattern_type.e13 = var_pattern %n.patt [concrete = constants.%n.var_patt]
// CHECK:STDOUT: }
// CHECK:STDOUT: %n.var: ref %i64.builtin = var %n.var_patt [concrete]
// CHECK:STDOUT: %.loc8_14.1: type = splice_block %.loc8_14.3 [concrete = constants.%i64.builtin] {
// CHECK:STDOUT: %Int.ref.loc8: %Int.type = name_ref Int, imports.%Main.Int [concrete = constants.%Int]
// CHECK:STDOUT: %int_64.loc8: Core.IntLiteral = int_value 64 [concrete = constants.%int_64.fab]
// CHECK:STDOUT: %Int.call.loc8: init type = call %Int.ref.loc8(%int_64.loc8) [concrete = constants.%i64.builtin]
// CHECK:STDOUT: %.loc8_14.2: type = value_of_initializer %Int.call.loc8 [concrete = constants.%i64.builtin]
// CHECK:STDOUT: %.loc8_14.3: type = converted %Int.call.loc8, %.loc8_14.2 [concrete = constants.%i64.builtin]
// CHECK:STDOUT: }
// CHECK:STDOUT: %n: ref %i64.builtin = ref_binding n, %n.var [concrete = %n.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Make.ref: %Make.type = name_ref Make, imports.%Main.Make [concrete = constants.%Make]
// CHECK:STDOUT: %FromLiteral.ref.loc7: %FromLiteral.type = name_ref FromLiteral, imports.%Main.FromLiteral [concrete = constants.%FromLiteral]
// CHECK:STDOUT: %int_64.loc7: Core.IntLiteral = int_value 64 [concrete = constants.%int_64.fab]
// CHECK:STDOUT: %FromLiteral.call.loc7: init %i32.builtin = call %FromLiteral.ref.loc7(%int_64.loc7) [concrete = constants.%int_64.f82]
// CHECK:STDOUT: %.loc7_38.1: %i32.builtin = value_of_initializer %FromLiteral.call.loc7 [concrete = constants.%int_64.f82]
// CHECK:STDOUT: %.loc7_38.2: %i32.builtin = converted %FromLiteral.call.loc7, %.loc7_38.1 [concrete = constants.%int_64.f82]
// CHECK:STDOUT: %Make.specific_fn: <specific function> = specific_function %Make.ref, @Make(constants.%int_64.f82) [concrete = constants.%Make.specific_fn.bb3]
// CHECK:STDOUT: %Make.call: init %i64.builtin = call %Make.specific_fn()
// CHECK:STDOUT: assign file.%m.var, %Make.call
// CHECK:STDOUT: %MakeFromClass.ref: %MakeFromClass.type = name_ref MakeFromClass, imports.%Main.MakeFromClass [concrete = constants.%MakeFromClass]
// CHECK:STDOUT: %FromLiteral.ref.loc8: %FromLiteral.type = name_ref FromLiteral, imports.%Main.FromLiteral [concrete = constants.%FromLiteral]
// CHECK:STDOUT: %int_64.loc8: Core.IntLiteral = int_value 64 [concrete = constants.%int_64.fab]
// CHECK:STDOUT: %FromLiteral.call.loc8: init %i32.builtin = call %FromLiteral.ref.loc8(%int_64.loc8) [concrete = constants.%int_64.f82]
// CHECK:STDOUT: %OtherInt.ref: type = name_ref OtherInt, imports.%Main.OtherInt [concrete = constants.%OtherInt]
// CHECK:STDOUT: %.loc8_48.1: init %OtherInt = as_compatible %FromLiteral.call.loc8 [concrete = constants.%int_64.420]
// CHECK:STDOUT: %.loc8_48.2: init %OtherInt = converted %FromLiteral.call.loc8, %.loc8_48.1 [concrete = constants.%int_64.420]
// CHECK:STDOUT: %.loc8_59.1: %OtherInt = value_of_initializer %.loc8_48.2 [concrete = constants.%int_64.420]
// CHECK:STDOUT: %.loc8_59.2: %OtherInt = converted %.loc8_48.2, %.loc8_59.1 [concrete = constants.%int_64.420]
// CHECK:STDOUT: %MakeFromClass.specific_fn: <specific function> = specific_function %MakeFromClass.ref, @MakeFromClass(constants.%int_64.420) [concrete = constants.%MakeFromClass.specific_fn.3a7]
// CHECK:STDOUT: %MakeFromClass.call: init %i64.builtin = call %MakeFromClass.specific_fn()
// CHECK:STDOUT: assign file.%n.var, %MakeFromClass.call
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
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