[Bug tree-optimization/112678] [14 regression] Massive slowdown of compilation time with PGO

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112678

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rguenth at gcc dot gnu.org,
                   |                            |sebastian.huber@embedded-br
                   |                            |ains.de

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, the -fprofile-update mode default didn't change, did it?  I'm guessing
that for some reason the generated code is different for
-fprofile-update=single now?

Note IIRC "compile-time" for SPEC with PGO includes the training run itself,
so that might be also the reason for the slowdown (runtime performance
regression of the instrumented binary).