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
40 lines
1.8 KiB
C++
40 lines
1.8 KiB
C++
// RUN: %clang_cc1 -fmodules-ts %S/module.cppm -triple %itanium_abi_triple -emit-module-interface -o %t
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// RUN: %clang_cc1 -fmodules-ts %s -triple %itanium_abi_triple -fmodule-file=%t -emit-llvm -o - | FileCheck %s --implicit-check-not=unused --implicit-check-not=global_module
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// CHECK-DAG: @_ZW6Module19extern_var_exported = external {{(dso_local )?}}global
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// CHECK-DAG: @_ZW6Module19inline_var_exported = linkonce_odr {{(dso_local )?}}global
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// CHECK-DAG: @_ZW6Module18const_var_exported = available_externally {{(dso_local )?}}constant i32 3,
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//
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// CHECK-DAG: @_ZW6Module25extern_var_module_linkage = external {{(dso_local )?}}global
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// CHECK-DAG: @_ZW6Module25inline_var_module_linkage = linkonce_odr {{(dso_local )?}}global
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// CHECK-DAG: @_ZW6Module25static_var_module_linkage = available_externally {{(dso_local )?}}global i32 0,
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// CHECK-DAG: @_ZW6Module24const_var_module_linkage = available_externally {{(dso_local )?}}constant i32 3,
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module Module;
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void use() {
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// CHECK: define linkonce_odr {{.*}}@_ZW6Module20used_inline_exportedv
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used_inline_exported();
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// CHECK: declare {{.*}}@_ZW6Module18noninline_exportedv
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noninline_exported();
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(void)&extern_var_exported;
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(void)&inline_var_exported;
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(void)&const_var_exported;
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// FIXME: This symbol should not be visible here.
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// CHECK: declare {{.*}}@_ZW6Module26used_static_module_linkagev
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used_static_module_linkage();
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// CHECK: define linkonce_odr {{.*}}@_ZW6Module26used_inline_module_linkagev
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used_inline_module_linkage();
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// CHECK: declare {{.*}}@_ZW6Module24noninline_module_linkagev
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noninline_module_linkage();
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(void)&extern_var_module_linkage;
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(void)&inline_var_module_linkage;
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(void)&static_var_module_linkage; // FIXME: Should not be visible here.
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(void)&const_var_module_linkage;
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}
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