Recommit: GlobalISel: select G_EXTRACT and G_INSERT instructions on AArch64.

It revealed a bug in the Localizer pass which has now been fixed.

This includes the fix for SUBREG_TO_REG committed separately last time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308688 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed