llvm/test/CodeGen/AArch64/sve-fixed-length-shuffles.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s | FileCheck %s

target triple = "aarch64-unknown-linux-gnu"

; Currently there is no custom lowering for vector shuffles operating on types
; bigger than NEON. However, having no support opens us up to a code generator
; hang when expanding BUILD_VECTOR. Here we just validate the promblematic case
; successfully exits code generation.
define void @hang_when_merging_stores_after_legalisation(ptr %a, <2 x i32> %b) vscale_range(2,2) #0 {
; CHECK-LABEL: hang_when_merging_stores_after_legalisation:
; CHECK:       // %bb.0:
; CHECK-NEXT:    // kill: def $d0 killed $d0 def $z0
; CHECK-NEXT:    mov z0.s, s0
; CHECK-NEXT:    mov z1.d, z0.d
; CHECK-NEXT:    ext z1.b, z1.b, z1.b, #16
; CHECK-NEXT:    st2 { v0.4s, v1.4s }, [x0]
; CHECK-NEXT:    ret
  %splat = shufflevector <2 x i32> %b, <2 x i32> poison, <8 x i32> zeroinitializer
  %interleaved.vec = shufflevector <8 x i32> %splat, <8 x i32> poison, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7>
  store <8 x i32> %interleaved.vec, ptr %a, align 4
  ret void
}

; Ensure we don't crash when trying to lower a shuffle via an extract
define void @crash_when_lowering_extract_shuffle(ptr %dst, i1 %cond) vscale_range(2,2) #0 {
; CHECK-LABEL: crash_when_lowering_extract_shuffle:
; CHECK:       // %bb.0:
; CHECK-NEXT:    tbnz w1, #0, .LBB1_2
; CHECK-NEXT:  // %bb.1: // %vector.body
; CHECK-NEXT:    movi v0.2d, #0000000000000000
; CHECK-NEXT:    movi v1.2d, #0000000000000000
; CHECK-NEXT:    ldr z4, [x0]
; CHECK-NEXT:    ldr z5, [x0, #2, mul vl]
; CHECK-NEXT:    ldr z6, [x0, #3, mul vl]
; CHECK-NEXT:    umov w8, v0.b[8]
; CHECK-NEXT:    mov v1.b[1], v0.b[1]
; CHECK-NEXT:    fmov s2, w8
; CHECK-NEXT:    mov v1.b[2], v0.b[2]
; CHECK-NEXT:    mov v2.b[1], v0.b[9]
; CHECK-NEXT:    mov v1.b[3], v0.b[3]
; CHECK-NEXT:    mov v2.b[2], v0.b[10]
; CHECK-NEXT:    mov v1.b[4], v0.b[4]
; CHECK-NEXT:    mov v2.b[3], v0.b[11]
; CHECK-NEXT:    mov v1.b[5], v0.b[5]
; CHECK-NEXT:    mov v2.b[4], v0.b[12]
; CHECK-NEXT:    mov v1.b[6], v0.b[6]
; CHECK-NEXT:    mov v2.b[5], v0.b[13]
; CHECK-NEXT:    mov v1.b[7], v0.b[7]
; CHECK-NEXT:    mov v2.b[6], v0.b[14]
; CHECK-NEXT:    uunpklo z1.h, z1.b
; CHECK-NEXT:    mov v2.b[7], v0.b[15]
; CHECK-NEXT:    ext z0.b, z0.b, z0.b, #16
; CHECK-NEXT:    uunpklo z1.s, z1.h
; CHECK-NEXT:    ext v3.16b, v0.16b, v0.16b, #8
; CHECK-NEXT:    uunpklo z0.h, z0.b
; CHECK-NEXT:    uunpklo z2.h, z2.b
; CHECK-NEXT:    lsl z1.s, z1.s, #31
; CHECK-NEXT:    uunpklo z3.h, z3.b
; CHECK-NEXT:    uunpklo z0.s, z0.h
; CHECK-NEXT:    uunpklo z2.s, z2.h
; CHECK-NEXT:    asr z1.s, z1.s, #31
; CHECK-NEXT:    uunpklo z3.s, z3.h
; CHECK-NEXT:    lsl z0.s, z0.s, #31
; CHECK-NEXT:    bic z1.d, z4.d, z1.d
; CHECK-NEXT:    lsl z2.s, z2.s, #31
; CHECK-NEXT:    ldr z4, [x0, #1, mul vl]
; CHECK-NEXT:    asr z0.s, z0.s, #31
; CHECK-NEXT:    str z1, [x0]
; CHECK-NEXT:    lsl z3.s, z3.s, #31
; CHECK-NEXT:    asr z2.s, z2.s, #31
; CHECK-NEXT:    bic z0.d, z5.d, z0.d
; CHECK-NEXT:    asr z3.s, z3.s, #31
; CHECK-NEXT:    bic z1.d, z4.d, z2.d
; CHECK-NEXT:    str z0, [x0, #2, mul vl]
; CHECK-NEXT:    bic z3.d, z6.d, z3.d
; CHECK-NEXT:    str z1, [x0, #1, mul vl]
; CHECK-NEXT:    str z3, [x0, #3, mul vl]
; CHECK-NEXT:  .LBB1_2: // %exit
; CHECK-NEXT:    ret
  %broadcast.splat = shufflevector <32 x i1> zeroinitializer, <32 x i1> zeroinitializer, <32 x i32> zeroinitializer
  br i1 %cond, label %exit, label %vector.body

vector.body:
  %1 = load <32 x i32>, ptr %dst, align 16
  %predphi = select <32 x i1> %broadcast.splat, <32 x i32> zeroinitializer, <32 x i32> %1
  store <32 x i32> %predphi, ptr %dst, align 16
  br label %exit

exit:
  ret void
}

attributes #0 = { "target-features"="+sve" }