am d0d07fca: am 71921a3f: Merge "x86_64: Clobber r8 to r11 and xmm0 to xmm15"

* commit 'd0d07fca560841ae4ac62abca62554ce7e0a041b':
  x86_64: Clobber r8 to r11 and xmm0 to xmm15