[Bug tree-optimization/94573] Optimizer produces suboptimal code related to -fstore-merging

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94573

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
      Known to fail|                            |9.3.1
      Known to work|                            |10.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I see

C00001F93:
.LFB0:
        .cfi_startproc
        movslq  %edi, %rdi
        leaq    (%rdi,%rdi,2), %rax
        salq    $4, %rax
        movq    $0, C000016DD(%rax)
        movq    $0, C000016DD+8(%rax)
        movq    $0, C000016DD+16(%rax)
        movq    $0, C000016DD+24(%rax)
        ret

with GCC 10.  Confirmed it uses 4 byte moves with GCC 9.  Fixed in GCC 10 thus.