NFC. Fix popular typo in comment 'deferencing' --> 'dereferencing'.
Bonus changes, * placement in X86ISelLowering and 'exerce' -> 'exercise' in test.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273984 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed