llvm/test/CodeGen/AArch64/sve-masked-gather-legalize.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -aarch64-enable-mgather-combine=0 -enable-misched=false < %s | FileCheck %s
; RUN: llc -aarch64-enable-mgather-combine=1 -enable-misched=false < %s | FileCheck %s

target triple = "aarch64-linux-gnu"

; Test for multiple uses of the mgather where the s/zext should not be combined

define <vscale x 2 x i64> @masked_sgather_sext(i8* %base, <vscale x 2 x i64> %offsets, <vscale x 2 x i1> %mask, <vscale x 2 x i8> %vals) #0 {
; CHECK-LABEL: masked_sgather_sext:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ld1sb { z0.d }, p0/z, [x0, z0.d]
; CHECK-NEXT:    ptrue p0.d
; CHECK-NEXT:    movprfx z2, z0
; CHECK-NEXT:    sxtb z2.d, p0/m, z0.d
; CHECK-NEXT:    add z0.d, z0.d, z1.d
; CHECK-NEXT:    sxtb z0.d, p0/m, z0.d
; CHECK-NEXT:    mul z0.d, p0/m, z0.d, z2.d
; CHECK-NEXT:    ret
  %ptrs = getelementptr i8, i8* %base, <vscale x 2 x i64> %offsets
  %data = call <vscale x 2 x i8> @llvm.masked.gather.nxv2i8(<vscale x 2 x i8*> %ptrs, i32 1, <vscale x 2 x i1> %mask, <vscale x 2 x i8> undef)
  %data.sext = sext <vscale x 2 x i8> %data to <vscale x 2 x i64>
  %add = add <vscale x 2 x i8> %data, %vals
  %add.sext = sext <vscale x 2 x i8> %add to <vscale x 2 x i64>
  %mul = mul <vscale x 2 x i64> %data.sext, %add.sext
  ret <vscale x 2 x i64> %mul
}

define <vscale x 2 x i64> @masked_sgather_zext(i8* %base, <vscale x 2 x i64> %offsets, <vscale x 2 x i1> %mask, <vscale x 2 x i8> %vals) #0 {
; CHECK-LABEL: masked_sgather_zext:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ld1sb { z0.d }, p0/z, [x0, z0.d]
; CHECK-NEXT:    ptrue p0.d
; CHECK-NEXT:    add z1.d, z0.d, z1.d
; CHECK-NEXT:    and z0.d, z0.d, #0xff
; CHECK-NEXT:    and z1.d, z1.d, #0xff
; CHECK-NEXT:    mul z0.d, p0/m, z0.d, z1.d
; CHECK-NEXT:    ret
  %ptrs = getelementptr i8, i8* %base, <vscale x 2 x i64> %offsets
  %data = call <vscale x 2 x i8> @llvm.masked.gather.nxv2i8(<vscale x 2 x i8*> %ptrs, i32 1, <vscale x 2 x i1> %mask, <vscale x 2 x i8> undef)
  %data.zext = zext <vscale x 2 x i8> %data to <vscale x 2 x i64>
  %add = add <vscale x 2 x i8> %data, %vals
  %add.zext = zext <vscale x 2 x i8> %add to <vscale x 2 x i64>
  %mul = mul <vscale x 2 x i64> %data.zext, %add.zext
  ret <vscale x 2 x i64> %mul
}

; Tests that exercise various type legalisation scenarios for ISD::MGATHER.

; Code generate load of an illegal datatype via promotion.
define <vscale x 2 x i8> @masked_gather_nxv2i8(<vscale x 2 x i8*> %ptrs, <vscale x 2 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv2i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ld1sb { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    ret
  %data = call <vscale x 2 x i8> @llvm.masked.gather.nxv2i8(<vscale x 2 x i8*> %ptrs, i32 1, <vscale x 2 x i1> %mask, <vscale x 2 x i8> undef)
  ret <vscale x 2 x i8> %data
}

; Code generate load of an illegal datatype via promotion.
define <vscale x 2 x i16> @masked_gather_nxv2i16(<vscale x 2 x i16*> %ptrs, <vscale x 2 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv2i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ld1sh { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    ret
  %data = call <vscale x 2 x i16> @llvm.masked.gather.nxv2i16(<vscale x 2 x i16*> %ptrs, i32 2, <vscale x 2 x i1> %mask, <vscale x 2 x i16> undef)
  ret <vscale x 2 x i16> %data
}

; Code generate load of an illegal datatype via promotion.
define <vscale x 2 x i32> @masked_gather_nxv2i32(<vscale x 2 x i32*> %ptrs, <vscale x 2 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv2i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ld1sw { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    ret
  %data = call <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x i32*> %ptrs, i32 4, <vscale x 2 x i1> %mask, <vscale x 2 x i32> undef)
  ret <vscale x 2 x i32> %data
}

define <vscale x 4 x half> @masked_gather_nxv4f16(<vscale x 4 x half*> %ptrs, <vscale x 4 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv4f16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    ld1h { z1.d }, p1/z, [z1.d]
; CHECK-NEXT:    ld1h { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    uzp1 z0.s, z0.s, z1.s
; CHECK-NEXT:    ret
  %data = call <vscale x 4 x half> @llvm.masked.gather.nxv4f16(<vscale x 4 x half*> %ptrs, i32 0, <vscale x 4 x i1> %mask, <vscale x 4 x half> undef)
  ret <vscale x 4 x half> %data
}

define <vscale x 2 x float> @masked_gather_nxv2f32(float* %base, <vscale x 2 x i16> %indices, <vscale x 2 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv2f32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ptrue p1.d
; CHECK-NEXT:    sxth z0.d, p1/m, z0.d
; CHECK-NEXT:    ld1w { z0.d }, p0/z, [x0, z0.d, sxtw #2]
; CHECK-NEXT:    ret
  %ptrs = getelementptr float, float* %base, <vscale x 2 x i16> %indices
  %data = call <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x float*> %ptrs, i32 1, <vscale x 2 x i1> %mask, <vscale x 2 x float> undef)
  ret <vscale x 2 x float> %data
}

define <vscale x 8 x half> @masked_gather_nxv8f16(<vscale x 8 x half*> %ptrs, <vscale x 8 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv8f16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    punpkhi p2.h, p1.b
; CHECK-NEXT:    punpklo p1.h, p1.b
; CHECK-NEXT:    ld1h { z3.d }, p2/z, [z3.d]
; CHECK-NEXT:    ld1h { z2.d }, p1/z, [z2.d]
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    ld1h { z1.d }, p1/z, [z1.d]
; CHECK-NEXT:    ld1h { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    uzp1 z2.s, z2.s, z3.s
; CHECK-NEXT:    uzp1 z0.s, z0.s, z1.s
; CHECK-NEXT:    uzp1 z0.h, z0.h, z2.h
; CHECK-NEXT:    ret
  %data = call <vscale x 8 x half> @llvm.masked.gather.nxv8f16(<vscale x 8 x half*> %ptrs, i32 2, <vscale x 8 x i1> %mask, <vscale x 8 x half> undef)
  ret <vscale x 8 x half> %data
}

define <vscale x 8 x bfloat> @masked_gather_nxv8bf16(bfloat* %base, <vscale x 8 x i16> %indices, <vscale x 8 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv8bf16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    sunpkhi z1.s, z0.h
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    sunpklo z0.s, z0.h
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    ld1h { z1.s }, p1/z, [x0, z1.s, sxtw #1]
; CHECK-NEXT:    ld1h { z0.s }, p0/z, [x0, z0.s, sxtw #1]
; CHECK-NEXT:    uzp1 z0.h, z0.h, z1.h
; CHECK-NEXT:    ret
  %ptrs = getelementptr bfloat, bfloat* %base, <vscale x 8 x i16> %indices
  %data = call <vscale x 8 x bfloat> @llvm.masked.gather.nxv8bf16(<vscale x 8 x bfloat*> %ptrs, i32 1, <vscale x 8 x i1> %mask, <vscale x 8 x bfloat> undef)
  ret <vscale x 8 x bfloat> %data
}

define <vscale x 4 x double> @masked_gather_nxv4f64(double* %base, <vscale x 4 x i16> %indices, <vscale x 4 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv4f64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ptrue p1.s
; CHECK-NEXT:    movprfx z1, z0
; CHECK-NEXT:    sxth z1.s, p1/m, z0.s
; CHECK-NEXT:    sunpklo z0.d, z1.s
; CHECK-NEXT:    punpklo p1.h, p0.b
; CHECK-NEXT:    sunpkhi z1.d, z1.s
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    ld1d { z0.d }, p1/z, [x0, z0.d, lsl #3]
; CHECK-NEXT:    ld1d { z1.d }, p0/z, [x0, z1.d, lsl #3]
; CHECK-NEXT:    ret
  %ptrs = getelementptr double, double* %base, <vscale x 4 x i16> %indices
  %data = call <vscale x 4 x double> @llvm.masked.gather.nxv4f64(<vscale x 4 x double*> %ptrs, i32 1, <vscale x 4 x i1> %mask, <vscale x 4 x double> undef)
  ret <vscale x 4 x double> %data
}

define <vscale x 8 x float> @masked_gather_nxv8f32(float* %base, <vscale x 8 x i32> %offsets, <vscale x 8 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv8f32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    punpklo p1.h, p0.b
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    ld1w { z0.s }, p1/z, [x0, z0.s, uxtw #2]
; CHECK-NEXT:    ld1w { z1.s }, p0/z, [x0, z1.s, uxtw #2]
; CHECK-NEXT:    ret
  %offsets.zext = zext <vscale x 8 x i32> %offsets to <vscale x 8 x i64>
  %ptrs = getelementptr float, float* %base, <vscale x 8 x i64> %offsets.zext
  %vals = call <vscale x 8 x float> @llvm.masked.gather.nxv8f32(<vscale x 8 x float*> %ptrs, i32 4, <vscale x 8 x i1> %mask, <vscale x 8 x float> undef)
  ret <vscale x 8 x float> %vals
}

; Code generate the worst case scenario when all vector types are legal.
define <vscale x 16 x i8> @masked_gather_nxv16i8(i8* %base, <vscale x 16 x i8> %indices, <vscale x 16 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv16i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    sunpkhi z1.h, z0.b
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    sunpkhi z2.s, z1.h
; CHECK-NEXT:    punpkhi p2.h, p1.b
; CHECK-NEXT:    sunpklo z1.s, z1.h
; CHECK-NEXT:    punpklo p1.h, p1.b
; CHECK-NEXT:    ld1sb { z2.s }, p2/z, [x0, z2.s, sxtw]
; CHECK-NEXT:    ld1sb { z1.s }, p1/z, [x0, z1.s, sxtw]
; CHECK-NEXT:    sunpklo z0.h, z0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    uzp1 z1.h, z1.h, z2.h
; CHECK-NEXT:    sunpkhi z2.s, z0.h
; CHECK-NEXT:    sunpklo z0.s, z0.h
; CHECK-NEXT:    ld1sb { z2.s }, p1/z, [x0, z2.s, sxtw]
; CHECK-NEXT:    ld1sb { z0.s }, p0/z, [x0, z0.s, sxtw]
; CHECK-NEXT:    uzp1 z0.h, z0.h, z2.h
; CHECK-NEXT:    uzp1 z0.b, z0.b, z1.b
; CHECK-NEXT:    ret
  %ptrs = getelementptr i8, i8* %base, <vscale x 16 x i8> %indices
  %data = call <vscale x 16 x i8> @llvm.masked.gather.nxv16i8(<vscale x 16 x i8*> %ptrs, i32 1, <vscale x 16 x i1> %mask, <vscale x 16 x i8> undef)
  ret <vscale x 16 x i8> %data
}

; Code generate the worst case scenario when all vector types are illegal.
define <vscale x 32 x i32> @masked_gather_nxv32i32(i32* %base, <vscale x 32 x i32> %indices, <vscale x 32 x i1> %mask) #0 {
; CHECK-LABEL: masked_gather_nxv32i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    punpklo p2.h, p0.b
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    punpklo p3.h, p2.b
; CHECK-NEXT:    punpkhi p2.h, p2.b
; CHECK-NEXT:    ld1w { z0.s }, p3/z, [x0, z0.s, sxtw #2]
; CHECK-NEXT:    ld1w { z1.s }, p2/z, [x0, z1.s, sxtw #2]
; CHECK-NEXT:    punpklo p2.h, p0.b
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    ld1w { z2.s }, p2/z, [x0, z2.s, sxtw #2]
; CHECK-NEXT:    ld1w { z3.s }, p0/z, [x0, z3.s, sxtw #2]
; CHECK-NEXT:    punpklo p0.h, p1.b
; CHECK-NEXT:    punpklo p2.h, p0.b
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    ld1w { z4.s }, p2/z, [x0, z4.s, sxtw #2]
; CHECK-NEXT:    ld1w { z5.s }, p0/z, [x0, z5.s, sxtw #2]
; CHECK-NEXT:    punpkhi p0.h, p1.b
; CHECK-NEXT:    punpklo p1.h, p0.b
; CHECK-NEXT:    punpkhi p0.h, p0.b
; CHECK-NEXT:    ld1w { z6.s }, p1/z, [x0, z6.s, sxtw #2]
; CHECK-NEXT:    ld1w { z7.s }, p0/z, [x0, z7.s, sxtw #2]
; CHECK-NEXT:    ret
  %ptrs = getelementptr i32, i32* %base, <vscale x 32 x i32> %indices
  %data = call <vscale x 32 x i32> @llvm.masked.gather.nxv32i32(<vscale x 32 x i32*> %ptrs, i32 4, <vscale x 32 x i1> %mask, <vscale x 32 x i32> undef)
  ret <vscale x 32 x i32> %data
}

; TODO: Currently, the sign extend gets applied to the values after a 'uzp1' of two
; registers, so it doesn't get folded away. Same for any other vector-of-pointers
; style gathers which don't fit in an <vscale x 2 x type*> single register. Better folding
; is required before we can check those off.
define <vscale x 4 x i32> @masked_sgather_nxv4i8(<vscale x 4 x i8*> %ptrs, <vscale x 4 x i1> %mask) #0 {
; CHECK-LABEL: masked_sgather_nxv4i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    punpkhi p1.h, p0.b
; CHECK-NEXT:    punpklo p0.h, p0.b
; CHECK-NEXT:    ld1sb { z1.d }, p1/z, [z1.d]
; CHECK-NEXT:    ld1sb { z0.d }, p0/z, [z0.d]
; CHECK-NEXT:    ptrue p0.s
; CHECK-NEXT:    uzp1 z0.s, z0.s, z1.s
; CHECK-NEXT:    sxtb z0.s, p0/m, z0.s
; CHECK-NEXT:    ret
  %vals = call <vscale x 4 x i8> @llvm.masked.gather.nxv4i8(<vscale x 4 x i8*> %ptrs, i32 1, <vscale x 4 x i1> %mask, <vscale x 4 x i8> undef)
  %svals = sext <vscale x 4 x i8> %vals to <vscale x 4 x i32>
  ret <vscale x 4 x i32> %svals
}

attributes #0 = { nounwind "target-features"="+sve,+bf16" }

declare <vscale x 2 x i8> @llvm.masked.gather.nxv2i8(<vscale x 2 x i8*>, i32, <vscale x 2 x i1>, <vscale x 2 x i8>)
declare <vscale x 2 x i16> @llvm.masked.gather.nxv2i16(<vscale x 2 x i16*>, i32, <vscale x 2 x i1>, <vscale x 2 x i16>)
declare <vscale x 2 x i32> @llvm.masked.gather.nxv2i32(<vscale x 2 x i32*>, i32, <vscale x 2 x i1>, <vscale x 2 x i32>)
declare <vscale x 4 x i8> @llvm.masked.gather.nxv4i8(<vscale x 4 x i8*>, i32, <vscale x 4 x i1>, <vscale x 4 x i8>)
declare <vscale x 16 x i8> @llvm.masked.gather.nxv16i8(<vscale x 16 x i8*>, i32, <vscale x 16 x i1>, <vscale x 16 x i8>)
declare <vscale x 32 x i32> @llvm.masked.gather.nxv32i32(<vscale x 32 x i32*>, i32, <vscale x 32 x i1>, <vscale x 32 x i32>)

declare <vscale x 4 x half> @llvm.masked.gather.nxv4f16(<vscale x 4 x half*>, i32, <vscale x 4 x i1>, <vscale x 4 x half>)
declare <vscale x 8 x half> @llvm.masked.gather.nxv8f16(<vscale x 8 x half*>, i32, <vscale x 8 x i1>, <vscale x 8 x half>)
declare <vscale x 8 x bfloat> @llvm.masked.gather.nxv8bf16(<vscale x 8 x bfloat*>, i32, <vscale x 8 x i1>, <vscale x 8 x bfloat>)
declare <vscale x 2 x float> @llvm.masked.gather.nxv2f32(<vscale x 2 x float*>, i32, <vscale x 2 x i1>, <vscale x 2 x float>)
declare <vscale x 8 x float> @llvm.masked.gather.nxv8f32(<vscale x 8 x float*>, i32, <vscale x 8 x i1>, <vscale x 8 x float>)
declare <vscale x 4 x double> @llvm.masked.gather.nxv4f64(<vscale x 4 x double*>, i32, <vscale x 4 x i1>, <vscale x 4 x double>)