[llvm] [AArch64] Create set.fpmr intrinsic and assembly lowering (PR #114248)

[via llvm-commits]

================
@@ -262,7 +262,7 @@ void llvm::addLiveIns(MachineBasicBlock &MBB, const LivePhysRegs &LiveRegs) {
   const MachineRegisterInfo &MRI = MF.getRegInfo();
   const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
   for (MCPhysReg Reg : LiveRegs) {
-    if (MRI.isReserved(Reg))
+    if (TRI.getReservedRegs(MF).test(Reg))
----------------
Lukacma wrote:

No longer required with simple MSR write. Removed.

https://github.com/llvm/llvm-project/pull/114248