[llvm-branch-commits] [llvm] [AArch64][PAC] Lower authenticated calls with ptrauth bundles. (PR #85736)

[Daniil Kovalev via llvm-branch-commits]

================
@@ -817,10 +817,44 @@ bool AArch64ExpandPseudo::expandCALL_RVMARKER(
   MachineInstr &MI = *MBBI;
   MachineOperand &RVTarget = MI.getOperand(0);
   assert(RVTarget.isGlobal() && "invalid operand for attached call");
-  MachineInstr *OriginalCall =
-      createCall(MBB, MBBI, TII, MI.getOperand(1),
-                 // Regmask starts after the RV and call targets.
-                 /*RegMaskStartIdx=*/2);
+
+  MachineInstr *OriginalCall = nullptr;
+
+  if (MI.getOpcode() == AArch64::BLRA_RVMARKER) {
+    // Pointer auth call.
+    MachineOperand &Key = MI.getOperand(2);
+    assert((Key.getImm() == 0 || Key.getImm() == 1) &&
+           "invalid key for ptrauth call");
+    MachineOperand &IntDisc = MI.getOperand(3);
----------------
kovdan01 wrote:

```suggestion
    const MachineOperand &IntDisc = MI.getOperand(3);
```

https://github.com/llvm/llvm-project/pull/85736