Revision 324946

MFC r324826:

Pull in r316035 from upstream llvm trunk (by Tim Northover):

  AArch64: account for possible frame index operand in compares.

  If the address of a local is used in a comparison, AArch64 can fold
  the address-calculation into the comparison via "adds".
  Unfortunately, a couple of places (both hit in this one test) are not
  ready to deal with that yet and just assume the first source operand
  is a register.

This should fix an assertion failure while building the test suite of
www/firefox for AArch64.

PR:		223048