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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
21 lines
552 B
C++
21 lines
552 B
C++
// RUN: %clang_cc1 -std=c++20 %s -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s
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export module Foo;
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// CHECK-DAG: @_ZW3Foo3ary =
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int ary[2];
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// CHECK-DAG: @_ZW3FooDC1a1bE =
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export auto &[a, b] = ary;
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namespace N {
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// CHECK-DAG: @_ZN1NW3FooDC1a1bEE =
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export auto &[a, b] = ary;
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// CHECK-DAG: @_ZN1NW3FooDC1c1dEE =
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auto &[c, d] = ary;
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// FIXME: We mangle the module name here, as we give this ModuleInternalLinkage
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// That's no longer needed.
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// CHECK DAG: @_ZN1MDC1e1fEE =
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static auto &__attribute__((used))[e, f] = ary;
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} // namespace N
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