!sum
# ShiftAllLeft — shift every element left by one amount. The amount is a
# scalar in the API, which the lowering broadcasts into the 64-bit lanes of the
# vector LSL (wide elements) shifts each narrower element by. LSL gives 0 for
# an amount of the element width or more, as the API does, so the amount needs
# no clamping. A constant amount below the element width becomes the immediate
# form, shiftAllLeftConst (sftimm).
- go: ShiftAllLeft
  asm: "ZLSL"
  specialLower: sftimm
  in:
  - &int
    go: $t
    base: int|uint
  - &wideShift
    class: vreg
    elemBits: 64
    treatLikeAScalarOfSize: 64
    name: shift
  out:
  - *int

# LSL has no wide form for 64-bit elements; LSL (vectors) takes the amount
# from each element of a vector instead, and gives 0 for 64 or more.
- go: ShiftAllLeft
  asm: "ZLSL"
  specialLower: sftimm
  in:
  - &int64
    go: $t
    base: int|uint
    elemBits: 64
  - *wideShift
  - class: mask # governing predicate
  out:
  - *int64

# shiftAllLeftConst — LSL (immediate, unpredicated), a shift by an amount
# below the element width. No API; sftimm lowers ShiftAllLeft to it.
- go: shiftAllLeftConst
  asm: "ZLSL"
  ssaVariant: "const"
  in:
  - class: immediate
  - *int
  out:
  - *int