[Bug c++/89557] [7/8 regression] 4*movq to 2*movaps IPC performance regression on znver1 with -Og

[0xe2.0x9a.0x9b at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89557

--- Comment #4 from Jan Ziak (http://atom-symbol.net) <0xe2.0x9a.0x9b at gmail 
dot com> ---
Without the aligned(16) attribute the alignment of the struct in my code is 8
bytes, struct size remains to be 16 bytes:

GCC 8.2.0 generates (-Og, no -march/mtune):

  movq $2, 0x80(%rsp)
  movsd %xmm0, 0x88(%rsp)
  movdqa 0x80(%rsp), %xmm6
  movups %xmm6, 0x30(%rsp)

The movups used here has approximately the same performance as movaps on
znver1.