[clang] 64c0792 - [clang][feature] Add cxx_abi_relative_vtable feature

[Leonard Chan via cfe-commits]

Author: Leonard Chan
Date: 2020-10-08T10:30:54-07:00
New Revision: 64c0792946b792839b2f39e4e208fdd7398aaea0

URL: https://github.com/llvm/llvm-project/commit/64c0792946b792839b2f39e4e208fdd7398aaea0
DIFF: https://github.com/llvm/llvm-project/commit/64c0792946b792839b2f39e4e208fdd7398aaea0.diff

LOG: [clang][feature] Add cxx_abi_relative_vtable feature

This will be enabled if relative vtables is enabled.

Differential revision: https://reviews.llvm.org/D85924

Added: 
    clang/test/Lexer/has_feature_cxx_abi_relative_vtable.cpp

Modified: 
    clang/include/clang/Basic/Features.def

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Basic/Features.def b/clang/include/clang/Basic/Features.def
index 999bcb7e2e29..302c56763c39 100644
--- a/clang/include/clang/Basic/Features.def
+++ b/clang/include/clang/Basic/Features.def
@@ -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

diff  --git a/clang/test/Lexer/has_feature_cxx_abi_relative_vtable.cpp b/clang/test/Lexer/has_feature_cxx_abi_relative_vtable.cpp
new file mode 100644
index 000000000000..d0f0c27b09d3
--- /dev/null
+++ b/clang/test/Lexer/has_feature_cxx_abi_relative_vtable.cpp
@@ -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