llvm/test/CodeGen/Thumb2/LowOverheadLoops/non-masked-store.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 -o - --verify-machineinstrs | FileCheck %s

--- |
  define dso_local arm_aapcs_vfpcc void @non_masked_store(i8* noalias nocapture %res, i8* nocapture readonly %a, i8* nocapture readonly %b, i32 %N) {
  entry:
    %cmp10 = icmp eq i32 %N, 0
    %0 = add i32 %N, 15
    %1 = lshr i32 %0, 4
    %2 = shl nuw i32 %1, 4
    %3 = add i32 %2, -16
    %4 = lshr i32 %3, 4
    %5 = add nuw nsw i32 %4, 1
    br i1 %cmp10, label %for.cond.cleanup, label %vector.ph

  vector.ph:                                        ; preds = %entry
    call void @llvm.set.loop.iterations.i32(i32 %5)
    br label %vector.body

  vector.body:                                      ; preds = %vector.body, %vector.ph
    %lsr.iv19 = phi i8* [ %scevgep20, %vector.body ], [ %res, %vector.ph ]
    %lsr.iv16 = phi i8* [ %scevgep17, %vector.body ], [ %b, %vector.ph ]
    %lsr.iv = phi i8* [ %scevgep, %vector.body ], [ %a, %vector.ph ]
    %6 = phi i32 [ %5, %vector.ph ], [ %11, %vector.body ]
    %7 = phi i32 [ %N, %vector.ph ], [ %9, %vector.body ]
    %lsr.iv1921 = bitcast i8* %lsr.iv19 to <16 x i8>*
    %lsr.iv1618 = bitcast i8* %lsr.iv16 to <16 x i8>*
    %lsr.iv15 = bitcast i8* %lsr.iv to <16 x i8>*
    %8 = call <16 x i1> @llvm.arm.mve.vctp8(i32 %7)
    %9 = sub i32 %7, 16
    %wide.masked.load = call <16 x i8> @llvm.masked.load.v16i8.p0v16i8(<16 x i8>* %lsr.iv15, i32 1, <16 x i1> %8, <16 x i8> undef)
    %wide.masked.load14 = call <16 x i8> @llvm.masked.load.v16i8.p0v16i8(<16 x i8>* %lsr.iv1618, i32 1, <16 x i1> %8, <16 x i8> undef)
    %10 = add <16 x i8> %wide.masked.load14, %wide.masked.load
    store <16 x i8> %10, <16 x i8>* %lsr.iv1921
    %scevgep = getelementptr i8, i8* %lsr.iv, i32 16
    %scevgep17 = getelementptr i8, i8* %lsr.iv16, i32 16
    %scevgep20 = getelementptr i8, i8* %lsr.iv19, i32 16
    %11 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %6, i32 1)
    %12 = icmp ne i32 %11, 0
    br i1 %12, label %vector.body, label %for.cond.cleanup

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

  declare <16 x i8> @llvm.masked.load.v16i8.p0v16i8(<16 x i8>*, i32 immarg, <16 x i1>, <16 x i8>)
  declare void @llvm.masked.store.v16i8.p0v16i8(<16 x i8>, <16 x i8>*, i32 immarg, <16 x i1>)
  declare void @llvm.set.loop.iterations.i32(i32)
  declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)
  declare <16 x i1> @llvm.arm.mve.vctp8(i32)

...
---
name:            non_masked_store
alignment:       2
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:
  - { reg: '$r0', virtual-reg: '' }
  - { reg: '$r1', virtual-reg: '' }
  - { reg: '$r2', virtual-reg: '' }
  - { reg: '$r3', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       8
  offsetAdjustment: 0
  maxAlignment:    4
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
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:       []
machineFunctionInfo: {}
body:             |
  ; CHECK-LABEL: name: non_masked_store
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r3
  ; 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 $r3, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
  ; CHECK:   t2IT 0, 8, implicit-def $itstate
  ; CHECK:   tPOP_RET 0 /* CC::eq */, killed $cpsr, def $r7, def $pc, implicit killed $itstate
  ; CHECK:   renamable $r12 = t2ADDri renamable $r3, 15, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $lr = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r12 = t2BICri killed renamable $r12, 15, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r12 = t2SUBri killed renamable $r12, 16, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $lr = nuw nsw t2ADDrs killed renamable $lr, killed renamable $r12, 35, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   $lr = t2DLS killed renamable $lr
  ; CHECK: bb.1.vector.body:
  ; CHECK:   successors: %bb.1(0x7c000000), %bb.2(0x04000000)
  ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r3
  ; CHECK:   renamable $vpr = MVE_VCTP8 renamable $r3, 0, $noreg
  ; CHECK:   renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 16, 14 /* CC::al */, $noreg
  ; CHECK:   MVE_VPST 4, implicit $vpr
  ; CHECK:   renamable $r1, renamable $q0 = MVE_VLDRBU8_post killed renamable $r1, 16, 1, renamable $vpr :: (load 16 from %ir.lsr.iv15, align 1)
  ; CHECK:   renamable $r2, renamable $q1 = MVE_VLDRBU8_post killed renamable $r2, 16, 1, killed renamable $vpr :: (load 16 from %ir.lsr.iv1618, align 1)
  ; CHECK:   renamable $q0 = MVE_VADDi8 killed renamable $q1, killed renamable $q0, 0, $noreg, undef renamable $q0
  ; CHECK:   renamable $r0 = MVE_VSTRBU8_post killed renamable $q0, killed renamable $r0, 16, 1, $noreg :: (store 16 into %ir.lsr.iv1921, align 1)
  ; CHECK:   $lr = t2LEUpdate killed renamable $lr, %bb.1
  ; CHECK: bb.2.for.cond.cleanup:
  ; CHECK:   tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
  bb.0.entry:
    successors: %bb.1(0x80000000)
    liveins: $r0, $r1, $r2, $r3, $lr

    frame-setup tPUSH 14, $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, $noreg
    frame-setup CFI_INSTRUCTION def_cfa_register $r7
    tCMPi8 renamable $r3, 0, 14, $noreg, implicit-def $cpsr
    t2IT 0, 8, implicit-def $itstate
    tPOP_RET 0, killed $cpsr, def $r7, def $pc, implicit killed $itstate
    renamable $r12 = t2ADDri renamable $r3, 15, 14, $noreg, $noreg
    renamable $lr = t2MOVi 1, 14, $noreg, $noreg
    renamable $r12 = t2BICri killed renamable $r12, 15, 14, $noreg, $noreg
    renamable $r12 = t2SUBri killed renamable $r12, 16, 14, $noreg, $noreg
    renamable $lr = nuw nsw t2ADDrs killed renamable $lr, killed renamable $r12, 35, 14, $noreg, $noreg
    t2DoLoopStart renamable $lr

  bb.1.vector.body:
    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
    liveins: $lr, $r0, $r1, $r2, $r3

    renamable $vpr = MVE_VCTP8 renamable $r3, 0, $noreg
    renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 16, 14, $noreg
    MVE_VPST 4, implicit $vpr
    renamable $r1, renamable $q0 = MVE_VLDRBU8_post killed renamable $r1, 16, 1, renamable $vpr :: (load 16 from %ir.lsr.iv15, align 1)
    renamable $r2, renamable $q1 = MVE_VLDRBU8_post killed renamable $r2, 16, 1, renamable $vpr :: (load 16 from %ir.lsr.iv1618, align 1)
    renamable $lr = t2LoopDec killed renamable $lr, 1
    renamable $q0 = MVE_VADDi8 killed renamable $q1, killed renamable $q0, 0, $noreg, undef renamable $q0
    renamable $r0 = MVE_VSTRBU8_post killed renamable $q0, killed renamable $r0, 16, 1, $noreg :: (store 16 into %ir.lsr.iv1921, align 1)
    t2LoopEnd renamable $lr, %bb.1, implicit-def dead $cpsr
    tB %bb.2, 14, $noreg

  bb.2.for.cond.cleanup:
    tPOP_RET 14, $noreg, def $r7, def $pc

...