Is there a way to apply -finstrument-functions to a .ll file?

Clang Frontend
1

Hi,

I got the following. Is there a way to apply -finstrument-functions to
a .ll file? Thanks.

$ clang -S -emit-llvm -c print1.c
$ clang -S -emit-llvm -finstrument-functions -c print1.ll -o /tmp/print1.ll
diff print1.ll /tmp/print1.ll
1c1
< ; ModuleID = 'print1.c'