Defined in 3 files as a macro:
- contrib/llvm/tools/clang/lib/Basic/Builtins.cpp, line 25 (as a macro)
- contrib/llvm/tools/clang/lib/Basic/Targets/AArch64.cpp, line 30 (as a macro)
- contrib/llvm/tools/clang/lib/Basic/Targets/ARM.cpp, line 730 (as a macro)