Do not generate calls to fentry with __attribute__((no_instrument_function))
Summary:
Currently only calls to mcount were suppressed with
no_instrument_function attribute.
Linux kernel requires that calls to fentry should also not be
generated.
This is an extended fix for PR PR33515.
Reviewers: hfinkel, rengolin, srhines, rnk, rsmith, rjmccall, hans
Reviewed By: rjmccall
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D43995
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@326639
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