[Bug target/114987] [14/15 Regression] floating point vector regression, x86, between gcc 14 and gcc-13 using -O3 and target clones on skylake platforms

[haochen.jiang at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114987

--- Comment #5 from Haochen Jiang <haochen.jiang at intel dot com> ---
What I have found is that the binary built with GCC13 and GCC14 will regress on
Cascadelake and Skylake.

But when I copied the binary to Icelake, it won't. Seems Icelake might fix this
with micro-tuning.

I tried to move "vmovdqa %xmm1,0xd0(%rsp)" before "vmovdqa %xmm0,0xe0(%rsp)"
and rebuilt the binary and it will save half the regression.