================
@@ -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.
----------------
kovdan01 wrote:
Yes, having a more detailed comment here would be nice. As for now, from the
comment it was unclear that this is Darwin-specific. It's also probably worth
mentioning that it's harmless for non-Darwin, as you said.
https://github.com/llvm/llvm-project/pull/85736
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