Stream: git-wasmtime

Topic: wasmtime / PR #3653 cranelift: Port `bitselect` over to I...

Wasmtime GitHub notifications bot (Jan 06 2022 at 01:09):

fitzgen opened PR #3653 from bitselect-isle to main:

This is causing a test failure, as we are generating some unnecessary movdqas now. Haven't had time to look into why this is happening, but I figured I would put this WIP PR up for posterity, along with info on the failing test and unnecessary moves.

CLIF:

function %bitselect_i16x8() -> i16x8 {
block0:
    v0 = vconst.i16x8 [0 0 0 0 0 0 0 0]
    v1 = vconst.i16x8 [0 0 0 0 0 0 0 0]
    v2 = vconst.i16x8 [0 0 0 0 0 0 0 0]
    v3 = bitselect v0, v1, v2
    return v3
}

Before:

VCode_ShowWithRRU {{
  Entry block: 0
Block 0:
  (original IR block: block0)
  (instruction range: 0 .. 11)
  Inst 0:   pushq   %rbp
  Inst 1:   movq    %rsp, %rbp
  Inst 2:   load_const VCodeConstant(0), %xmm0
  Inst 3:   load_const VCodeConstant(0), %xmm1
  Inst 4:   load_const VCodeConstant(0), %xmm2
  Inst 5:   pand    %xmm0, %xmm1
  Inst 6:   pandn   %xmm2, %xmm0
  Inst 7:   por     %xmm1, %xmm0
  Inst 8:   movq    %rbp, %rsp
  Inst 9:   popq    %rbp
  Inst 10:   ret
}}

After:

VCode_ShowWithRRU {{
  Entry block: 0
Block 0:
  (original IR block: block0)
  (instruction range: 0 .. 13)
  Inst 0:   pushq   %rbp
  Inst 1:   movq    %rsp, %rbp
  Inst 2:   load_const VCodeConstant(0), %xmm0
  Inst 3:   load_const VCodeConstant(0), %xmm3
  Inst 4:   load_const VCodeConstant(0), %xmm1
  Inst 5:   movdqa  %xmm0, %xmm2
  Inst 6:   pand    %xmm3, %xmm2
  Inst 7:   pandn   %xmm1, %xmm0
  Inst 8:   por     %xmm0, %xmm2
  Inst 9:   movdqa  %xmm2, %xmm0
  Inst 10:   movq    %rbp, %rsp
  Inst 11:   popq    %rbp
  Inst 12:   ret
}}

Wasmtime GitHub notifications bot (Jan 06 2022 at 17:56):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 18:43):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 18:48):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 18:48):

fitzgen has marked PR #3653 as ready for review.

Wasmtime GitHub notifications bot (Jan 06 2022 at 18:48):

fitzgen requested cfallin for a review on PR #3653.

Wasmtime GitHub notifications bot (Jan 06 2022 at 18:54):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 19:10):

cfallin submitted PR review.

Wasmtime GitHub notifications bot (Jan 06 2022 at 19:23):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 19:25):

fitzgen updated PR #3653 from bitselect-isle to main.

Wasmtime GitHub notifications bot (Jan 06 2022 at 21:06):

fitzgen merged PR #3653.

Last updated: Oct 23 2024 at 20:03 UTC