Defined in 3 files as a macro:
- contrib/llvm-project/clang/lib/Basic/Builtins.cpp, line 24 (as a macro)
- contrib/llvm-project/clang/lib/Basic/Targets/AArch64.cpp, line 36 (as a macro)
- contrib/llvm-project/clang/lib/Basic/Targets/ARM.cpp, line 874 (as a macro)