Francis Visoiu Mistrih 0610a35114 [AArch64] Add support for -ffixed-x30
Add support for reserving LR in:

* the driver through `-ffixed-x30`
* cc1 through `-target-feature +reserve-x30`
* the backend through `-mattr=+reserve-x30`
* a subtarget feature `reserve-x30`

the same way we're doing for the other registers.
2020-04-28 08:48:28 -07:00
..
2020-03-18 13:53:17 -07:00
2020-04-28 13:59:14 +01:00