https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78348
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that -O3 enables -floop-distribute-patterns which detects open-coded
memcpy/memmove/memset. The idea is that canonicalizing leads to optimal
inline expansion or library code.
I'm not sure I would count this as two vs. three memory streams as usually
improving things on the store side helps (this is how the current heuristic
works). CPUs are usually more store-bandwith limited. But yes, some
sort of target specific parameter might help here (number of store streams
we can handle).
