[X86] Stop printing moves between VR64 and GR64 with 'movd' mnemonic. Use 'movq' instead.

This behavior existed to work with an old version of the gnu assembler on MacOS that only accepted this form. Newer versions of GNU assembler and the current LLVM derived version of the assembler on MacOS support movq as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321898 91177308-0d34-0410-b5e6-96231b3b80d8
14 files changed