https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82261
Michael Clark <michaeljclark at mac dot com> changed:
What |Removed |Added
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CC| |michaeljclark at mac dot com
--- Comment #2 from Michael Clark <michaeljclark at mac dot com> ---
Just refreshing this issue. I found it while testing some code-gen on Godbolt:
- https://godbolt.org/z/uXGxZ9
I noticed that Haswell code-gen uses SHRX/SHLX, but I think -Os and pre-Haswell
would benefit from this peephole if it is not complex to add. Noting that Clang
prefers SHLD / SHRD over the SHRX+SHLX pair no matter the -march flavor.
