Files
swift-mirror/test/SILGen/opaque_values_cxx.swift
Egor Zhdan e5899ee167 [cxx-interop] Use fully-qualified type names of C++ template parameters
When importing C++ class template instantiations, Swift generates a type name for each instantiation. The generated names must be unique, since they are used for mangling.

If multiple different C++ types declare nested types with the same name, which are then used as template arguments, Swift was generating the same name for those template instantiations (e.g. `shared_ptr<Impl>` for different `Impl` types).

This change makes sure we use fully-qualified type names of template parameters when generating Swift type names for class template instantiations (e.g. `shared_ptr<MyNamespace.MyClass.Impl>`).

This fixes an assertion failure coming out of IRGen:
```
Assertion failed: (Buffer.empty() && "didn't claim all values out of buffer"), function ~ConstantInitBuilderBase, file ConstantInitBuilder.h, line 75.
```

rdar://141962480
2025-01-02 18:03:56 +00:00

27 lines
1.8 KiB
Swift

// RUN: %target-swift-emit-silgen -enable-sil-opaque-values -Xllvm -sil-full-demangle -cxx-interoperability-mode=swift-5.9 -import-objc-header %S/Inputs/opaque_values_cxx.h -primary-file %s | %FileCheck %s --check-prefix=CHECK
// TODO: Find the relevant mangled name instead of
// $sSo3stdO3__1O0020___wrap_iter__udAAdDaVSQSCSQ2eeoiySbx_xtFZTW for other
// platforms.
// REQUIRES: VENDOR=apple
import Cxx
// CHECK-LABEL: sil {{.*}}[ossa] @$sSo3stdO3__1O0065vectorCUnsignedIntstd__1allocatorCUnsignedInt_dDGIrdqahddCJdFaAjaV3Cxx0B8SequenceSCAgHP13__beginUnsafe11RawIteratorQzyFTW : {{.*}} {
// CHECK: bb0([[VECTOR_ADDR:%[^,]+]] :
// CHECK: [[VECTOR:%[^,]+]] = load_borrow [[VECTOR_ADDR]]
// CHECK: [[BEGIN_FN:%[^,]+]] = function_ref
// CHECK: [[BEGIN:%[^,]+]] = apply [[BEGIN_FN]]([[VECTOR]])
// CHECK: end_borrow [[VECTOR]]
// CHECK: return [[BEGIN]]
// CHECK-LABEL: } // end sil function '$sSo3stdO3__1O0065vectorCUnsignedIntstd__1allocatorCUnsignedInt_dDGIrdqahddCJdFaAjaV3Cxx0B8SequenceSCAgHP13__beginUnsafe11RawIteratorQzyFTW'
// CHECK-LABEL: sil {{.*}}[ossa] @$sSo3stdO{{(3__1O)?}}0047___wrap_iterUnsafePointerCUnsignedInt_heCInnaEgaVSQSCSQ2eeoiySbx_xtFZTW : {{.*}} {
// CHECK: bb0([[LHS:%[^,]+]] : $std.__1.__wrap_iter<UnsafePointer<CUnsignedInt>>, [[RHS:%[^,]+]] :
// CHECK: [[CALLEE:%[^,]+]] = function_ref @$sSo2eeoiySbSo3stdO{{(3__1O)?}}0047___wrap_iterUnsafePointerCUnsignedInt_heCInnaEgaV_AGtFTO
// CHECK: [[EQUAL:%[^,]+]] = apply [[CALLEE]]([[LHS]], [[RHS]])
// CHECK: return [[EQUAL]]
// CHECK-LABEL: } // end sil function '$sSo3stdO{{(3__1O)?}}0047___wrap_iterUnsafePointerCUnsignedInt_heCInnaEgaVSQSCSQ2eeoiySbx_xtFZTW'
func test_cxx_vector_uint32t_iterate(_ n: Int, _ vectorOfU32: VectorOfU32) {
for x in vectorOfU32 {}
}