Update comments on isav9-cap-from-ptr.ll

This was missed in CTSRD-CHERI#708

Author: arichardson

llvm/test/CodeGen/RISCV/cheri/isav9-cap-from-ptr.ll

@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-;; The CFromPtr instruction is not part of ISAv9, check that we emit `x == 0 ? null : csetoffset(auth, x)` instead.
+;; The CFromPtr instruction is not part of ISAv9, check that we emit `x == 0 ? null : csetaddr(auth, x)` instead.
+;; Note: Since DDC-offsetting is no longer part of ISAv9, the expansion consistently uses csetaddr and not csetoffset!
 ; RUN: %riscv64_cheri_purecap_llc < %s | FileCheck %s --check-prefix=ISAV9
 
 ;; (int_cheri_cap_from_ptr auth, x) -> x == 0 ? null : csetoffset(auth, x)
@@ -22,8 +23,7 @@ entry:
   ret i8 addrspace(200)* %new
 }
 
-;; (int_cheri_cap_from_ptr ddc, y) -> x == 0 ? null : csetoffset(ddc, x)
-;; NB: This is not the same as (inttoptr x), since the explicit intrinsic retains the offsetting semantics.
+;; (int_cheri_cap_from_ptr ddc, y) -> x == 0 ? null : csetaddr(ddc, x)
 define dso_local i8 addrspace(200)* @cap_from_ptr_ddc(i8 addrspace(200)* addrspace(200)* %ptr, i64 %offset) nounwind {
 ; ISAV9-LABEL: cap_from_ptr_ddc:
 ; ISAV9:       # %bb.0: # %entry