[Bug target/126055] [17 Regression] 10% slowdown of perlbench_r on AMD Zen5 since r17-1927-gb64fc298a3538c
hjl.tools at gmail dot com
gcc-bugzilla@gcc.gnu.org
Tue Jun 30 22:46:54 GMT 2026
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126055
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |125856, 125865
CC|hjl at gcc dot gnu.org |hjl.tools at gmail dot com,
| |liuhongt at gcc dot gnu.org
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Hongtao, can you reproduce it on Intel CPUs? r17-1927 changes both bounded
memcpy and memset expansions. Does memcpy or memset change cause this?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125856
[Bug 125856] [16/17 Regression] x86 gcc16 codesize regression related to memcpy
inline caused by r16-2047-g401199377c5004
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125865
[Bug 125865] [16/17 Regression] Unnecessary branches when expanding memset by
r16-2047-g401199377c5004
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