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

[Daniil Kovalev via llvm-branch-commits]

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@@ -1694,6 +1718,35 @@ let Predicates = [HasPAuth] in {
     def BLRABZ  : AuthOneOperand<0b001, 1, "blrabz">;
   }
 
+  // BLRA pseudo, generalized version of BLRAA/BLRAB/Z.
+  // This directly manipulates x16/x17, which are the only registers the OS
+  // guarantees are safe to use for sensitive operations.
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kovdan01 wrote:

A link to the docs/spec with such info would be nice to have

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