Hi Alexandros,

Linaro benchmarking CI flagged this patch.  After it clang seems to miscompile 
602.gcc_s from SPEC CPU2017 for  "-O3 -flto" on aarch64-linux-gnu.  Also, it 
appears that 600.perlbench_s slows down by 9%.

Could you investigate, please?  Let me know if you need any assistance in 
reproducing the problem.

Our Benchmarking CI is still in active development, and there are false 
positives, but this report seems to be legit [1].

Kind regards,

[1] 
https://ci.linaro.org/job/tcwg_bmk-code_speed-cpu2017speed--llvm-aarch64-master-O3_LTO-build/21/artifact/artifacts/mail/mail-body.txt/*view*/

--
Maxim Kuvyrkov
https://www.linaro.org




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