w2yehia added inline comments.

================
Comment at: clang/test/Driver/fprofile-update.c:18
+// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate 
-fprofile-update=atomic 2>&1 | FileCheck %s --check-prefix=AIX
+// RUN: %clang -### %s --target=powerpc-unknown-aix -fprofile-generate 
-fprofile-update=prefer-atomic 2>&1 | FileCheck %s --check-prefix=AIX
+// AIX: "-latomic"
----------------
not sure if it's typical to also add a negative test that -latomic is not added 
by default or with "single" suboption. I'll leave it to you to decide.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D159137/new/

https://reviews.llvm.org/D159137

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