llvm/test/CodeGen/Thumb2/LowOverheadLoops/iv-vcmp.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv8.1m.main -mattr=+mve -run-pass=arm-low-overhead-loops %s -verify-machineinstrs -o - | FileCheck %s
--- |

  ; Function Attrs: nofree norecurse nounwind
  define dso_local arm_aapcs_vfpcc void @test(i32* noalias nocapture %a, i32* nocapture readonly %b, i32 %N) local_unnamed_addr #0 {
  entry:
    %cmp9 = icmp eq i32 %N, 0
    %0 = add i32 %N, 3
    %1 = lshr i32 %0, 2
    %2 = shl nuw i32 %1, 2
    %3 = add i32 %2, -4
    %4 = lshr i32 %3, 2
    %5 = add nuw nsw i32 %4, 1
    br i1 %cmp9, label %for.cond.cleanup, label %vector.ph

  vector.ph:                                        ; preds = %entry
    %div = lshr i32 %N, 1
    %trip.count.minus.1 = add i32 %N, -1
    %broadcast.splatinsert = insertelement <4 x i32> undef, i32 %trip.count.minus.1, i32 0
    %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> undef, <4 x i32> zeroinitializer
    call void @llvm.set.loop.iterations.i32(i32 %5)
    br label %vector.body

  vector.body:                                      ; preds = %vector.body, %vector.ph
    %lsr.iv3 = phi i32* [ %scevgep4, %vector.body ], [ %b, %vector.ph ]
    %lsr.iv1 = phi i32* [ %scevgep, %vector.body ], [ %a, %vector.ph ]
    %vec.ind = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %vector.ph ], [ %vec.ind.next, %vector.body ]
    %elts.rem = phi i32 [ %N, %vector.ph ], [ %elts.rem.next, %vector.body ]
    %6 = phi i32 [ %5, %vector.ph ], [ %12, %vector.body ]
    %lsr.iv35 = bitcast i32* %lsr.iv3 to <4 x i32>*
    %lsr.iv12 = bitcast i32* %lsr.iv1 to <4 x i32>*
    %7 = insertelement <4 x i32> undef, i32 %div, i32 0
    %8 = shufflevector <4 x i32> %7, <4 x i32> undef, <4 x i32> zeroinitializer
    %9 = icmp ult <4 x i32> %vec.ind, %8
    %10 = call <4 x i1> @llvm.arm.mve.vctp32(i32 %elts.rem)
    %11 = and <4 x i1> %9, %10
    %wide.masked.load = call <4 x i32> @llvm.masked.load.v4i32.p0v4i32(<4 x i32>* %lsr.iv35, i32 4, <4 x i1> %11, <4 x i32> undef)
    call void @llvm.masked.store.v4i32.p0v4i32(<4 x i32> %wide.masked.load, <4 x i32>* %lsr.iv12, i32 4, <4 x i1> %11)
    %vec.ind.next = add <4 x i32> %vec.ind, <i32 4, i32 4, i32 4, i32 4>
    %elts.rem.next = sub i32 %elts.rem, 4
    %scevgep = getelementptr i32, i32* %lsr.iv1, i32 4
    %scevgep4 = getelementptr i32, i32* %lsr.iv3, i32 4
    %12 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %6, i32 1)
    %13 = icmp ne i32 %12, 0
    br i1 %13, label %vector.body, label %for.cond.cleanup

  for.cond.cleanup:                                 ; preds = %vector.body, %entry
    ret void
  }

  declare <4 x i32> @llvm.masked.load.v4i32.p0v4i32(<4 x i32>*, i32 immarg, <4 x i1>, <4 x i32>)
  declare void @llvm.masked.store.v4i32.p0v4i32(<4 x i32>, <4 x i32>*, i32 immarg, <4 x i1>)
  declare <4 x i1> @llvm.arm.mve.vctp32(i32)
  declare void @llvm.set.loop.iterations.i32(i32)
  declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)

...
---
name:            test
alignment:       16
tracksRegLiveness: true
registers:       []
liveins:
  - { reg: '$r0', virtual-reg: '' }
  - { reg: '$r1', virtual-reg: '' }
  - { reg: '$r2', virtual-reg: '' }
frameInfo:
  stackSize:       8
  offsetAdjustment: 0
  maxAlignment:    4
fixedStack:      []
stack:
  - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
constants:
  - id:              0
    value:           '<4 x i32> <i32 0, i32 1, i32 2, i32 3>'
    alignment:       16
    isTargetSpecific: false
machineFunctionInfo: {}
body:             |
  ; CHECK-LABEL: name: test
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   liveins: $lr, $r0, $r1, $r2
  ; CHECK:   frame-setup tPUSH 14 /* CC::al */, $noreg, killed $lr, implicit-def $sp, implicit $sp
  ; CHECK:   frame-setup CFI_INSTRUCTION def_cfa_offset 8
  ; CHECK:   frame-setup CFI_INSTRUCTION offset $lr, -4
  ; CHECK:   frame-setup CFI_INSTRUCTION offset $r7, -8
  ; CHECK:   dead $r7 = frame-setup tMOVr $sp, 14 /* CC::al */, $noreg
  ; CHECK:   frame-setup CFI_INSTRUCTION def_cfa_register $r7
  ; CHECK:   tCMPi8 renamable $r2, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
  ; CHECK:   t2IT 0, 8, implicit-def $itstate
  ; CHECK:   frame-destroy tPOP_RET 0 /* CC::eq */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
  ; CHECK:   renamable $q2 = MVE_VMOVimmi32 4, 0, $noreg, undef renamable $q2
  ; CHECK:   renamable $r3 = tLEApcrel %const.0, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $q0 = MVE_VLDRWU32 killed renamable $r3, 0, 0, $noreg :: (load 16 from constant-pool)
  ; CHECK:   renamable $r3, dead $cpsr = tLSRri renamable $r2, 1, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $q1 = MVE_VDUP32 killed renamable $r3, 0, $noreg, undef renamable $q1
  ; CHECK:   $lr = MVE_DLSTP_32 killed renamable $r2
  ; CHECK: bb.1.vector.body:
  ; CHECK:   successors: %bb.1(0x7c000000), %bb.2(0x04000000)
  ; CHECK:   liveins: $lr, $q0, $q1, $q2, $r0, $r1
  ; CHECK:   renamable $vpr = MVE_VCMPu32 renamable $q1, renamable $q0, 8, 0, killed $noreg
  ; CHECK:   MVE_VPST 4, implicit $vpr
  ; CHECK:   renamable $r1, renamable $q3 = MVE_VLDRWU32_post killed renamable $r1, 16, 1, renamable $vpr :: (load 16 from %ir.lsr.iv35, align 4)
  ; CHECK:   renamable $r0 = MVE_VSTRWU32_post killed renamable $q3, killed renamable $r0, 16, 1, killed renamable $vpr :: (store 16 into %ir.lsr.iv12, align 4)
  ; CHECK:   renamable $q0 = MVE_VADDi32 killed renamable $q0, renamable $q2, 0, $noreg, undef renamable $q0
  ; CHECK:   $lr = MVE_LETP killed renamable $lr, %bb.1
  ; CHECK: bb.2.for.cond.cleanup:
  ; CHECK:   frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
  ; CHECK: bb.3 (align 16):
  ; CHECK:   CONSTPOOL_ENTRY 0, %const.0, 16
  bb.0.entry:
    successors: %bb.1(0x80000000)
    liveins: $r0, $r1, $r2, $lr

    frame-setup tPUSH 14 /* CC::al */, $noreg, killed $lr, implicit-def $sp, implicit $sp
    frame-setup CFI_INSTRUCTION def_cfa_offset 8
    frame-setup CFI_INSTRUCTION offset $lr, -4
    frame-setup CFI_INSTRUCTION offset $r7, -8
    $r7 = frame-setup tMOVr $sp, 14 /* CC::al */, $noreg
    frame-setup CFI_INSTRUCTION def_cfa_register $r7
    tCMPi8 renamable $r2, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
    t2IT 0, 8, implicit-def $itstate
    frame-destroy tPOP_RET 0 /* CC::eq */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
    renamable $r3, dead $cpsr = tADDi3 renamable $r2, 3, 14 /* CC::al */, $noreg
    renamable $q2 = MVE_VMOVimmi32 4, 0, $noreg, undef renamable $q2
    renamable $r3 = t2BICri killed renamable $r3, 3, 14 /* CC::al */, $noreg, $noreg
    renamable $r12 = t2SUBri killed renamable $r3, 4, 14 /* CC::al */, $noreg, $noreg
    renamable $r3, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
    renamable $lr = nuw nsw t2ADDrs killed renamable $r3, killed renamable $r12, 19, 14 /* CC::al */, $noreg, $noreg
    renamable $r3 = tLEApcrel %const.0, 14 /* CC::al */, $noreg
    renamable $q0 = MVE_VLDRWU32 killed renamable $r3, 0, 0, $noreg :: (load 16 from constant-pool)
    renamable $r3, dead $cpsr = tLSRri renamable $r2, 1, 14 /* CC::al */, $noreg
    renamable $q1 = MVE_VDUP32 killed renamable $r3, 0, $noreg, undef renamable $q1
    t2DoLoopStart renamable $lr

  bb.1.vector.body:
    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
    liveins: $lr, $q0, $q1, $q2, $r0, $r1, $r2

    renamable $vpr = MVE_VCTP32 renamable $r2, 0, $noreg
    renamable $r2, dead $cpsr = tSUBi8 killed renamable $r2, 4, 14 /* CC::al */, $noreg
    MVE_VPST 2, implicit $vpr
    renamable $vpr = MVE_VCMPu32 renamable $q1, renamable $q0, 8, 1, killed renamable $vpr
    renamable $r1, renamable $q3 = MVE_VLDRWU32_post killed renamable $r1, 16, 1, renamable $vpr :: (load 16 from %ir.lsr.iv35, align 4)
    renamable $r0 = MVE_VSTRWU32_post killed renamable $q3, killed renamable $r0, 16, 1, killed renamable $vpr :: (store 16 into %ir.lsr.iv12, align 4)
    renamable $q0 = MVE_VADDi32 killed renamable $q0, renamable $q2, 0, $noreg, undef renamable $q0
    renamable $lr = t2LoopDec killed renamable $lr, 1
    t2LoopEnd renamable $lr, %bb.1, implicit-def dead $cpsr
    tB %bb.2, 14 /* CC::al */, $noreg

  bb.2.for.cond.cleanup:
    frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc

  bb.3 (align 16):
    CONSTPOOL_ENTRY 0, %const.0, 16

...