A sample code causing SIGILL on MacOS X

test.cpp

int main(void) {
  __asm__("movl  $0, 0(%rbp,%rdx,4)");
}

The above code causes SIGILL on MacOS X (High Sierra 10.13.3).

Here is a result for g++.

$ g++ --version 
g++ (Homebrew GCC 7.2.0) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++ test.cpp
$ ./a.out
zsh: illegal hardware instruction  ./a.out

Clang++ has the same problem.

$ clang++ --version 
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
$ clang++ test.cpp
$ ./a.out
zsh: illegal hardware instruction  ./a.out