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[clang][feature] Add cxx_abi_relative_vtable feature 

This will be enabled if relative vtables is enabled.

Differential revision: https://reviews.llvm.org/D85924
This commit is contained in:
Leonard Chan 2020-10-08 10:27:47 -07:00
parent 4a1682e931
commit 64c0792946
2 changed files with 15 additions and 0 deletions
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2
clang/include/clang/Basic/Features.def
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@ -256,5 +256,7 @@ EXTENSION(gnu_asm, LangOpts.GNUAsm)
EXTENSION(gnu_asm_goto_with_outputs, LangOpts.GNUAsm)
EXTENSION(matrix_types, LangOpts.MatrixTypes)
FEATURE(cxx_abi_relative_vtable, LangOpts.CPlusPlus && LangOpts.RelativeCXXABIVTables)
#undef EXTENSION
#undef FEATURE

13
clang/test/Lexer/has_feature_cxx_abi_relative_vtable.cpp Normal file
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@ -0,0 +1,13 @@
// RUN: %clang_cc1 -E %s -triple x86_64-linux-gnu -x c++ -o - | FileCheck %s --check-prefix=NO-RELATIVE-VTABLE
// RUN: %clang_cc1 -E %s -triple x86_64-linux-gnu -x c++ -fexperimental-relative-c++-abi-vtables -o - | FileCheck %s --check-prefix=RELATIVE-VTABLE
// RUN: %clang_cc1 -E %s -triple x86_64-linux-gnu -x c++ -fno-experimental-relative-c++-abi-vtables -o - | FileCheck %s --check-prefix=NO-RELATIVE-VTABLE
// RUN: %clang_cc1 -E %s -triple x86_64-linux-gnu -x c -fexperimental-relative-c++-abi-vtables -o - | FileCheck %s --check-prefix=NO-RELATIVE-VTABLE
#if __has_feature(cxx_abi_relative_vtable)
int has_relative_vtable();
#else
int has_no_relative_vtable();
#endif
// RELATIVE-VTABLE: has_relative_vtable
// NO-RELATIVE-VTABLE: has_no_relative_vtable