https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110059
d_vampile <d_vampile at 163 dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|10.3.1 |10.3.0
Target| |aarch64
URL| |https://gcc.gnu.org/piperma
| |il/gcc-patches/2019-Septemb
| |er/530304.html
--- Comment #1 from d_vampile <d_vampile at 163 dot com> ---
When the SPEC is used to test the GCC (10.3.0) performance, the test result of
subitem 548 fluctuates abnormally.
Trace the cause of the exception. I analyze that the commit(r276140) is faulty.
Revert this commit(r276140), and the fluctuation of spec 548 test results for
gcc 10.3.0 is significantly reduced. The following is the test result.
GCC 10.3.0 test result:
Benchmarks copies runtime ratio
548.exchange2_r 128 553 607
548.exchange2_r 128 512 654
548.exchange2_r 128 513 654
548.exchange2_r 128 553 607
548.exchange2_r 128 553 607
548.exchange2_r 128 514 652
548.exchange2_r 128 515 652
548.exchange2_r 128 553 607
548.exchange2_r 128 553 607
548.exchange2_r 128 508 660
Test result after revert this commit:
Benchmarks copies runtime ratio
548.exchange2_r 128 520 645
548.exchange2_r 128 680 494
548.exchange2_r 128 527 637
548.exchange2_r 128 679 494
548.exchange2_r 128 524 640
548.exchange2_r 128 679 494
548.exchange2_r 128 524 640
548.exchange2_r 128 524 640
548.exchange2_r 128 520 645
548.exchange2_r 128 521 644
