Re: [PATCH v9] pgo: add clang's Profile Guided Optimization infrastructure
From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-06-14 15:36:26
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On Mon, Jun 14, 2021 at 08:26:01AM -0700, Kees Cook wrote:
So, AFAICT, the original blocking issue ("PGO does not respect noinstr")
is not actually an issue (noinstr contains notrace, which IS respected
by PGO[2]), I think this is fine to move forward.It is *NOT*: https://godbolt.org/z/9c7xdvGd9 Look at how both compilers generate instrumentation in the no_instr() function.