mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-11-14 11:20:38 +00:00
Dana Jansens
24766e213e
When identifying a facet type, defer evaluation of LookupImplWitnesses by redirecting them to evaluate into IdentifiedWitness. Then the caller of identify will need to substitute the IdentifiedWitnesses, either with witnesses of their own, or with LookupImplWitness to cause a lookup operation. This allows: - An `impl as` on a named constraint can subst the witnesses in designators from the named constraint with a witness to the impl itself. This prevents them from looking for and finding some other overlapping impl. (This PR) - Impl lookup to collect rewrite/equality requirements from all named constraints and then use the impls it has already found to evaluate any designators in those requirements instead of performing impl lookup again (creating a cycle). (Done in https://github.com/carbon-language/carbon-lang/pull/7944) - Similarly, an `impl as` can collect impls and equality requirements from all named constraints and verify them correctly by replacing witnesses that should refer to the impl with the correct witness instead of performing a lookup and finding an overlapping impl. (Done in https://github.com/carbon-language/carbon-lang/pull/7937) - ImplWitnessAccess to be able to find rewrites from a named constraint, not just from the initial DeclaredFacetType. (TBD) To do this we need to introduce the concept of "identified" specifics. In order to identify a facet type, we must construct a specific for each require decl in a named constraint. These specifics will have IdentifiedWitnesses inside them, but their args would otherwise match a specific for the require decl constructed in another context. To avoid polluting the canonical specific namespace, we introduce a second namespace of specifics that are "identified" since they are created by identifying. As we have introduced a new global state that modifies eval behaviour, we must disable that state when resolving a specific (as per https://github.com/carbon-language/carbon-lang/pull/7923). But inside an "identified" specific, we preserve the behaviour so that the witnesses modified by identify (through SubstPeriodSelf or through evaluating a require specific) have their evaluation deferred.
297 lines
17 KiB
Plaintext
297 lines
17 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/full.carbon
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// EXTRA-ARGS: --clang-arg=--std=c++20
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/function/import/constexpr.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/import/constexpr.carbon
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// --- basic.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr int add(int a, int b) { return a + b; }
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''';
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let a: array(i32, Cpp.add(1, 2)) = (1, 2, 3);
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// --- bool_param.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr int bool_fn(bool b) {
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return b ? 3 : 0;
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}
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''';
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let a: array(i32, Cpp.bool_fn(true)) = (1, 2, 3);
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// --- float_param.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr int float_fn(float b) {
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return static_cast<int>(b);
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}
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''';
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let a: array(i32, Cpp.float_fn(3.0)) = (1, 2, 3);
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// --- return_bool.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr bool return_bool_fn() {
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return true;
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}
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''';
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musteval fn F(b: bool) -> i32 {
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return if b then 3 else 0;
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}
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let a: array(i32, F(Cpp.return_bool_fn())) = (1, 2, 3);
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// --- fail_invalid_constant_eval.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr int arr[1] = {0};
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constexpr int invalid_const_fn(int a) {
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return arr[a];
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}
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''';
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// CHECK:STDERR: fail_invalid_constant_eval.carbon:[[@LINE+4]]:19: error: array bound is not a constant [InvalidArrayExpr]
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// CHECK:STDERR: let a: array(i32, Cpp.invalid_const_fn(5)) = (1, 2, 3);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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let a: array(i32, Cpp.invalid_const_fn(5)) = (1, 2, 3);
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// --- nonconstant_constexpr_call.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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var a: i32 = 0;
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inline Cpp '''
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constexpr int nonconst_constexpr_fn(const int &r) { return r; }
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''';
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// OK, runtime call.
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var b: i32 = Cpp.nonconst_constexpr_fn(a);
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// --- fail_nonconstant_consteval_call.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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var a: i32 = 0;
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// TODO: This is failing when building the thunk, not when calling it.
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inline Cpp '''
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE+9]]:15: error: call to consteval function 'nonconst_consteval_fn' is not a constant expression [CppInteropParseError]
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// CHECK:STDERR: 19 | consteval int nonconst_consteval_fn(const int &r) { return r; }
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE+6]]:15: note: function parameter 'r' with unknown value cannot be used in a constant expression [CppInteropParseNote]
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// CHECK:STDERR: 19 | consteval int nonconst_consteval_fn(const int &r) { return r; }
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE+3]]:15: note: declared here [CppInteropParseNote]
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// CHECK:STDERR: 19 | consteval int nonconst_consteval_fn(const int &r) { return r; }
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// CHECK:STDERR: | ^
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consteval int nonconst_consteval_fn(const int &r) { return r; }
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''';
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE+11]]:14: note: in thunk for C++ function used here [InCppThunk]
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// CHECK:STDERR: var b: i32 = Cpp.nonconst_consteval_fn(a);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE+7]]:14: error: non-constant call to compile-time-only function [NonConstantCallToCompTimeOnlyFunction]
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// CHECK:STDERR: var b: i32 = Cpp.nonconst_consteval_fn(a);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_nonconstant_consteval_call.carbon:[[@LINE-10]]:15: note: compile-time-only function declared here [CompTimeOnlyFunctionHere]
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// CHECK:STDERR: consteval int nonconst_consteval_fn(const int &r) { return r; }
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var b: i32 = Cpp.nonconst_consteval_fn(a);
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// --- fail_todo_constructor.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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inline Cpp '''
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struct ConstexprC {
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constexpr ConstexprC(int a) : a(a) {}
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int a;
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};
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''';
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// TODO: This should probably be allowed.
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eval fn F() -> i32 {
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//@dump-sem-ir-begin
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// CHECK:STDERR: fail_todo_constructor.carbon:[[@LINE+3]]:27: error: expression is runtime; expected constant [EvalRequiresConstantValue]
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// CHECK:STDERR: let c: Cpp.ConstexprC = 3;
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// CHECK:STDERR: ^
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let c: Cpp.ConstexprC = 3;
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return c.a;
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//@dump-sem-ir-end
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}
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// CHECK:STDERR: fail_todo_constructor.carbon:[[@LINE+4]]:19: note: in call to F here [InCallToEvalFn]
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// CHECK:STDERR: let a: array(i32, F()) = (1, 2, 3);
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// CHECK:STDERR: ^~~
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// CHECK:STDERR:
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let a: array(i32, F()) = (1, 2, 3);
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// CHECK:STDOUT: --- fail_todo_constructor.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: type: type = facet_type <type> [concrete]
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
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// CHECK:STDOUT: %ConstexprC: type = class_type @ConstexprC [concrete]
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// CHECK:STDOUT: %ConstexprC.elem: type = unbound_element_type %ConstexprC, %i32 [concrete]
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// CHECK:STDOUT: %pattern_type.3cc: type = pattern_type %ConstexprC [concrete]
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// CHECK:STDOUT: %c.patt: %pattern_type.3cc = value_binding_pattern c [concrete]
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// CHECK:STDOUT: %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
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// CHECK:STDOUT: %ptr.0b8: type = ptr_type %ConstexprC [concrete]
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// CHECK:STDOUT: %ConstexprC__carbon_thunk.type: type = fn_type @ConstexprC__carbon_thunk [concrete]
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// CHECK:STDOUT: %ConstexprC__carbon_thunk: %ConstexprC__carbon_thunk.type = struct_value () [concrete]
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// CHECK:STDOUT: %ImplicitAs.type.6b0: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
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// CHECK:STDOUT: %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.3c6: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl.6b6(%To) [symbolic]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.6f2: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.3c6 = struct_value () [symbolic]
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// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
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// CHECK:STDOUT: %ImplicitAs.impl_witness.d73: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.f53, @Core.IntLiteral.as.ImplicitAs.impl.6b6(%int_32) [concrete]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.766: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl.6b6(%int_32) [concrete]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.f60: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.766 = struct_value () [concrete]
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// CHECK:STDOUT: %ImplicitAs.facet.fc6: %ImplicitAs.type.6b0 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.d73) [concrete]
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// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.58f: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs.WithSelf(%i32, %ImplicitAs.facet.fc6) [concrete]
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// CHECK:STDOUT: %.33a: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.58f, %ImplicitAs.facet.fc6 [concrete]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.f60 [concrete]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.f60, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
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// CHECK:STDOUT: %bound_method: <bound method> = bound_method %int_3.1ba, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
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// CHECK:STDOUT: %int_3.9f3: %i32 = int_value 3 [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.a1d: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.3c1: %Int.as.Copy.impl.Op.type.a1d = struct_value () [symbolic]
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// CHECK:STDOUT: %Copy.impl_witness.8af: <witness> = impl_witness imports.%Copy.impl_witness_table.f44, @Int.as.Copy.impl(%int_32) [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.648: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_32) [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.cae: %Int.as.Copy.impl.Op.type.648 = struct_value () [concrete]
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// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %i32, (%Copy.impl_witness.8af) [concrete]
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// CHECK:STDOUT: %Copy.WithSelf.Op.type.f76: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
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// CHECK:STDOUT: %.2b9: type = fn_type_with_self_type %Copy.WithSelf.Op.type.f76, %Copy.facet [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.cae, @Int.as.Copy.impl.Op(%int_32) [concrete]
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// CHECK:STDOUT: %self.param_patt.d94: %pattern_type.3cc = ref_param_pattern [concrete]
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// CHECK:STDOUT: %self.patt.d4e: %pattern_type.3cc = wrapper_binding_pattern self, %self.param_patt.d94 [concrete]
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// CHECK:STDOUT: %ConstexprC.cpp_destructor.type: type = fn_type @ConstexprC.cpp_destructor [concrete]
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// CHECK:STDOUT: %ConstexprC.cpp_destructor: %ConstexprC.cpp_destructor.type = struct_value () [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.type.ef0: type = fn_type @Destroy.WithSelf.Op.loc19 [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.Op.403: %Destroy.WithSelf.Op.type.ef0 = struct_value () [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.type.fbc: type = fn_type @Destroy.WithSelf.SelfDestruct.loc19 [concrete]
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.db3: %Destroy.WithSelf.SelfDestruct.type.fbc = struct_value () [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
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// CHECK:STDOUT: .ConstexprC = %ConstexprC.decl
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %ConstexprC.decl: type = class_decl @ConstexprC [concrete = constants.%ConstexprC] {} {}
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// CHECK:STDOUT: %ConstexprC__carbon_thunk.decl: %ConstexprC__carbon_thunk.type = fn_decl @ConstexprC__carbon_thunk [concrete = constants.%ConstexprC__carbon_thunk] {
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import_ref.e47: @Core.IntLiteral.as.ImplicitAs.impl.6b6.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.3c6) = import_ref Core//prelude/types/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.6b6.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.6f2)]
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// CHECK:STDOUT: %ImplicitAs.impl_witness_table.f53 = impl_witness_table (%Core.import_ref.e47), @Core.IntLiteral.as.ImplicitAs.impl.6b6 [concrete]
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// CHECK:STDOUT: %Core.import_ref.72f: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.a1d) = import_ref Core//prelude/types/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.3c1)]
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// CHECK:STDOUT: %Copy.impl_witness_table.f44 = impl_witness_table (%Core.import_ref.72f), @Int.as.Copy.impl [concrete]
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// CHECK:STDOUT: %ConstexprC.cpp_destructor.decl: %ConstexprC.cpp_destructor.type = fn_decl @ConstexprC.cpp_destructor [concrete = constants.%ConstexprC.cpp_destructor] {
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: generated {
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// CHECK:STDOUT: %Destroy.WithSelf.Op.decl: %Destroy.WithSelf.Op.type.ef0 = fn_decl @Destroy.WithSelf.Op.loc19 [concrete = constants.%Destroy.WithSelf.Op.403] {
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// CHECK:STDOUT: %self.param_patt: %pattern_type.3cc = ref_param_pattern [concrete = constants.%self.param_patt.d94]
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// CHECK:STDOUT: %self.patt: %pattern_type.3cc = wrapper_binding_pattern self, %self.param_patt [concrete = constants.%self.patt.d4e]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %self.param: ref %ConstexprC = ref_param call_param0
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// CHECK:STDOUT: %self: ref %ConstexprC = wrapper_binding self, %self.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @F() -> out %return.param: %i32 {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %int_3: Core.IntLiteral = int_value 3 [concrete = constants.%int_3.1ba]
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// CHECK:STDOUT: %.loc19_27.1: ref %ConstexprC = temporary_storage
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// CHECK:STDOUT: %impl.elem0.loc19: %.33a = impl_witness_access constants.%ImplicitAs.impl_witness.d73, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.f60]
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// CHECK:STDOUT: %bound_method.loc19_27.1: <bound method> = bound_method %int_3, %impl.elem0.loc19 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound]
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// CHECK:STDOUT: %specific_fn.loc19: <specific function> = specific_function %impl.elem0.loc19, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
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// CHECK:STDOUT: %bound_method.loc19_27.2: <bound method> = bound_method %int_3, %specific_fn.loc19 [concrete = constants.%bound_method]
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// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call: init %i32 = call %bound_method.loc19_27.2(%int_3) [concrete = constants.%int_3.9f3]
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// CHECK:STDOUT: %.loc19_27.2: %i32 = value_of_initializer %Core.IntLiteral.as.ImplicitAs.impl.Convert.call [concrete = constants.%int_3.9f3]
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// CHECK:STDOUT: %.loc19_27.3: %i32 = converted %int_3, %.loc19_27.2 [concrete = constants.%int_3.9f3]
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// CHECK:STDOUT: %addr: %ptr.0b8 = addr_of %.loc19_27.1
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// CHECK:STDOUT: %ConstexprC__carbon_thunk.call: init %empty_tuple.type = call imports.%ConstexprC__carbon_thunk.decl(%.loc19_27.3, %addr)
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// CHECK:STDOUT: %.loc19_27.4: init %ConstexprC to %.loc19_27.1 = mark_in_place_init %ConstexprC__carbon_thunk.call
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// CHECK:STDOUT: %.loc19_27.5: init %ConstexprC = converted %int_3, %.loc19_27.4
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// CHECK:STDOUT: %.loc19_27.6: ref %ConstexprC = temporary %.loc19_27.1, %.loc19_27.5
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// CHECK:STDOUT: %.loc19_27.7: %ConstexprC = acquire_value %.loc19_27.6
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// CHECK:STDOUT: %.loc19_13: type = splice_block %ConstexprC.ref [concrete = constants.%ConstexprC] {
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// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %ConstexprC.ref: type = name_ref ConstexprC, imports.%ConstexprC.decl [concrete = constants.%ConstexprC]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %c: %ConstexprC = wrapper_binding c, %.loc19_27.7
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %c.patt: %pattern_type.3cc = value_binding_pattern c [concrete = constants.%c.patt]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %c.ref: %ConstexprC = name_ref c, %c
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// CHECK:STDOUT: %a.ref: %ConstexprC.elem = name_ref a, @ConstexprC.%field_decl [concrete = @ConstexprC.%field_decl]
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// CHECK:STDOUT: %.loc20_11.1: ref %i32 = class_element_access %c.ref, element0
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// CHECK:STDOUT: %.loc20_11.2: %i32 = acquire_value %.loc20_11.1
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// CHECK:STDOUT: %impl.elem0.loc20: %.2b9 = impl_witness_access constants.%Copy.impl_witness.8af, element0 [concrete = constants.%Int.as.Copy.impl.Op.cae]
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// CHECK:STDOUT: %bound_method.loc20_11.1: <bound method> = bound_method %.loc20_11.2, %impl.elem0.loc20
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// CHECK:STDOUT: %specific_fn.loc20: <specific function> = specific_function %impl.elem0.loc20, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
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// CHECK:STDOUT: %bound_method.loc20_11.2: <bound method> = bound_method %.loc20_11.2, %specific_fn.loc20
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc20_11.2(%.loc20_11.2)
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.bound: <bound method> = bound_method %.loc19_27.6, constants.%Destroy.WithSelf.SelfDestruct.db3
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// CHECK:STDOUT: %Destroy.WithSelf.SelfDestruct.call: init %empty_tuple.type = call %Destroy.WithSelf.SelfDestruct.bound(%.loc19_27.6)
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// CHECK:STDOUT: return %Int.as.Copy.impl.Op.call
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Destroy.WithSelf.Op.loc19(%self.param: ref %ConstexprC) = "no_op";
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Destroy.WithSelf.SelfDestruct.loc19(%self.param: ref %ConstexprC) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %Destroy.WithSelf.Op.call: init %empty_tuple.type = call generated.%Destroy.WithSelf.Op.decl(%self.param)
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// CHECK:STDOUT: %ConstexprC.cpp_destructor.call: init %empty_tuple.type = call imports.%ConstexprC.cpp_destructor.decl(%self.param)
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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