[LLVMbugs] [Bug 11251] lshr of character vector inefficient on x86

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sat Nov 10 05:30:28 PST 2012


Benjamin Kramer <benny.kra at gmail.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
                 CC|                            |benny.kra at gmail.com
         Resolution|                            |FIXED

--- Comment #1 from Benjamin Kramer <benny.kra at gmail.com> 2012-11-10 07:30:28 CST ---
This was fixed a while ago. llc emits:

    .space    16,63
    .section    __TEXT,__text,regular,pure_instructions
    .globl    _shift_vec16x8
    .align    4, 0x90
_shift_vec16x8:                         ## @shift_vec16x8
## BB#0:                                ## %entry
    psrlw    $2, %xmm0
    pand    LCPI0_0(%rip), %xmm0

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