We used to list registers that were not in the AVX space. In other words, we were pushing registers that the ISA cannot encode (YMM16-YMM31). This is part of llvm.org/PR27481. llvm-svn: 268983
This resolves https://llvm.org/bugs/show_bug.cgi?id=26412 Differential Revision: http://reviews.llvm.org/D17542 llvm-svn: 262319