[Bug target/127897] [14/15/16/17 Regression] x86: set1 vector constants built with 2-3 instructions instead of a memory operand

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127897

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-10-15
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Priority|P3                          |P2
                 CC|                            |sayle at gcc dot gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  With -Os 'g' is OK but f is still

f:
.LFB7494:
        .cfi_startproc
        movss   .LC1(%rip), %xmm1
        shufps  $0, %xmm1, %xmm1
        mulps   %xmm1, %xmm0
        movss   .LC3(%rip), %xmm1
        shufps  $0, %xmm1, %xmm1
        addps   %xmm1, %xmm0
        ret

Roger has been doing x86 vector materialization work recently, so maybe he has
an idea to improve things.