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ae4dce8659
Implement a demangleable strong ownership symbol mangling. * The original module symbol mangling scheme turned out to be undemangleable. * The hoped-for C++17 compatibility of weak ownership turns out to be fragile * C++20 now has better ways of controlling C++17 compatibility The issue is captured on the ABI list at: https://github.com/itanium-cxx-abi/cxx-abi/issues/134 GCC implements this new mangling. The old mangling is unceremoniously dropped. No backwards compatibility, no deprectated old-mangling flag. It was always labelled experimental. (Old and new manglings cannot be confused.) Reviewed By: dblaikie Differential Revision: https://reviews.llvm.org/D122256
33 lines
913 B
C++
33 lines
913 B
C++
// RUN: %clang_cc1 -std=c++20 %s -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s
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module;
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# 5 __FILE__ 1
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class Pooh;
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class Piglet;
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# 8 "" 2
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export module std; // might happen, you can't say it won't!
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namespace std {
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export template<typename T> class allocator {
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// just for testing, not real!
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void M (T *);
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template <typename U> U *N (T *);
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};
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template<typename T> void allocator<T>::M (T *) {}
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template<typename T> template<typename U> U *allocator<T>::N (T *) {
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return nullptr;
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}
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// CHECK-DAG: void @_ZNStW3std9allocatorIiE1MEPi(
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template void allocator<int>::M (int *);
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// CHECK-DAG: @_ZNStW3std9allocatorIiE1NIfEEPT_Pi(
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template float *allocator<int>::N<float> (int *);
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}
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// CHECK-DAG: @_ZNStW3std9allocatorI4PoohE1MEPS1_(
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template void std::allocator<Pooh>::M (Pooh *);
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// CHECK-DAG: @_ZNStW3std9allocatorI4PoohE1NI6PigletEEPT_PS1_(
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template Piglet *std::allocator<Pooh>::N<Piglet> (Pooh *);
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