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

[Daniil Kovalev via llvm-branch-commits]

================
@@ -9206,6 +9222,31 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
     LowerCallTo(I, Callee, I.isTailCall(), I.isMustTailCall());
 }
 
+void SelectionDAGBuilder::LowerCallSiteWithPtrAuthBundle(
+    const CallBase &CB, const BasicBlock *EHPadBB) {
+  auto PAB = CB.getOperandBundle("ptrauth");
+  auto *CalleeV = CB.getCalledOperand();
+
+  // Gather the call ptrauth data from the operand bundle:
+  //   [ i32 <key>, i64 <discriminator> ]
+  auto *Key = cast<ConstantInt>(PAB->Inputs[0]);
----------------
kovdan01 wrote:

```suggestion
  const auto *Key = cast<ConstantInt>(PAB->Inputs[0]);
```

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