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

--- |
  define hidden arm_aapcs_vfpcc void @it_block_store_count_before_start(float* %pSrc, float* %pDst, i32 %blockSize, i32* %iter.addr) #0 {
  entry:
    %mul = shl i32 %blockSize, 1
    %0 = add i32 %mul, 3
    %1 = icmp slt i32 %mul, 4
    %smin = select i1 %1, i32 %mul, i32 4
    %2 = sub i32 %0, %smin
    %3 = lshr i32 %2, 2
    %4 = add nuw nsw i32 %3, 1
    store i32 %4, i32* %iter.addr, align 4
    %start = call i32 @llvm.start.loop.iterations.i32(i32 %4)
    br label %do.body

  do.body:                                          ; preds = %do.body, %entry
    %lsr.iv = phi i32 [ %lsr.iv.next, %do.body ], [ %start, %entry ]
    %blkCnt.0 = phi i32 [ %mul, %entry ], [ %sub, %do.body ]
    %pDst.addr.0 = phi float* [ %pDst, %entry ], [ %add.ptr4, %do.body ]
    %pSrc.addr.0 = phi float* [ %pSrc, %entry ], [ %add.ptr, %do.body ]
    %pDst.addr.01 = bitcast float* %pDst.addr.0 to <4 x float>*
    %pSrc.addr.02 = bitcast float* %pSrc.addr.0 to <4 x float>*
    %5 = tail call <4 x i1> @llvm.arm.mve.vctp32(i32 %blkCnt.0)
    %6 = tail call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* %pSrc.addr.02, i32 4, <4 x i1> %5, <4 x float> undef)
    %7 = fmul <4 x float> %6, %6
    tail call void @llvm.masked.store.v4f32.p0v4f32(<4 x float> %7, <4 x float>* %pDst.addr.01, i32 4, <4 x i1> %5)
    %add.ptr = getelementptr inbounds float, float* %pSrc.addr.0, i32 4
    %add.ptr4 = getelementptr inbounds float, float* %pDst.addr.0, i32 4
    %sub = add nsw i32 %blkCnt.0, -4
    %8 = call i32 @llvm.loop.decrement.reg.i32(i32 %lsr.iv, i32 1)
    %9 = icmp ne i32 %8, 0
    %lsr.iv.next = add nsw i32 %lsr.iv, -1
    br i1 %9, label %do.body, label %do.end

  do.end:                                           ; preds = %do.body
    ret void
  }

  define hidden arm_aapcs_vfpcc void @it_block_store_count_after_start(float* %pSrc, float* %pDst, i32 %blockSize, i32* %iter.addr) #0 {
  entry:
    %mul = shl i32 %blockSize, 1
    %0 = add i32 %mul, 3
    %1 = icmp slt i32 %mul, 4
    %smin = select i1 %1, i32 %mul, i32 4
    %2 = sub i32 %0, %smin
    %3 = lshr i32 %2, 2
    %4 = add nuw nsw i32 %3, 1
    %start = call i32 @llvm.start.loop.iterations.i32(i32 %4)
    store i32 %4, i32* %iter.addr, align 4
    br label %do.body

  do.body:                                          ; preds = %do.body, %entry
    %lsr.iv = phi i32 [ %lsr.iv.next, %do.body ], [ %start, %entry ]
    %blkCnt.0 = phi i32 [ %mul, %entry ], [ %sub, %do.body ]
    %pDst.addr.0 = phi float* [ %pDst, %entry ], [ %add.ptr4, %do.body ]
    %pSrc.addr.0 = phi float* [ %pSrc, %entry ], [ %add.ptr, %do.body ]
    %pDst.addr.01 = bitcast float* %pDst.addr.0 to <4 x float>*
    %pSrc.addr.02 = bitcast float* %pSrc.addr.0 to <4 x float>*
    %5 = tail call <4 x i1> @llvm.arm.mve.vctp32(i32 %blkCnt.0)
    %6 = tail call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* %pSrc.addr.02, i32 4, <4 x i1> %5, <4 x float> undef)
    %7 = fmul <4 x float> %6, %6
    tail call void @llvm.masked.store.v4f32.p0v4f32(<4 x float> %7, <4 x float>* %pDst.addr.01, i32 4, <4 x i1> %5)
    %add.ptr = getelementptr inbounds float, float* %pSrc.addr.0, i32 4
    %add.ptr4 = getelementptr inbounds float, float* %pDst.addr.0, i32 4
    %sub = add nsw i32 %blkCnt.0, -4
    %8 = call i32 @llvm.loop.decrement.reg.i32(i32 %lsr.iv, i32 1)
    %9 = icmp ne i32 %8, 0
    %lsr.iv.next = add nsw i32 %lsr.iv, -1
    br i1 %9, label %do.body, label %do.end

  do.end:                                           ; preds = %do.body
    ret void
  }

  ; Function Attrs: nounwind readnone
  declare <4 x i1> @llvm.arm.mve.vctp32(i32) #1

  ; Function Attrs: argmemonly nounwind readonly willreturn
  declare <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>*, i32 immarg, <4 x i1>, <4 x float>) #2

  ; Function Attrs: argmemonly nounwind willreturn writeonly
  declare void @llvm.masked.store.v4f32.p0v4f32(<4 x float>, <4 x float>*, i32 immarg, <4 x i1>) #3

  ; Function Attrs: noduplicate nounwind
  declare i32 @llvm.start.loop.iterations.i32(i32) #4

  ; Function Attrs: noduplicate nounwind
  declare i32 @llvm.loop.decrement.reg.i32(i32, i32) #4

  attributes #0 = { "target-features"="+mve.fp" }
  attributes #1 = { nounwind readnone "target-features"="+mve.fp" }
  attributes #2 = { argmemonly nounwind readonly willreturn "target-features"="+mve.fp" }
  attributes #3 = { argmemonly nounwind willreturn writeonly "target-features"="+mve.fp" }
  attributes #4 = { noduplicate nounwind "target-features"="+mve.fp" }

...
---
name:            it_block_store_count_before_start
alignment:       2
tracksRegLiveness: true
registers:       []
liveins:
  - { reg: '$r0', virtual-reg: '' }
  - { reg: '$r1', virtual-reg: '' }
  - { reg: '$r2', virtual-reg: '' }
  - { reg: '$r3', virtual-reg: '' }
frameInfo:
  stackSize:       8
  offsetAdjustment: 0
  maxAlignment:    4
  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: it_block_store_count_before_start
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r3, $r7
  ; CHECK:   frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, 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:   renamable $lr = t2MOVi 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r12 = t2LSLri renamable $r2, 1, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   t2CMPri renamable $r12, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
  ; CHECK:   t2IT 11, 8, implicit-def $itstate
  ; CHECK:   $lr = t2LSLri renamable $r2, 1, 11 /* CC::lt */, killed $cpsr, $noreg, implicit killed renamable $lr, implicit killed $itstate
  ; CHECK:   renamable $r2 = t2RSBrs killed renamable $lr, killed renamable $r2, 10, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $lr = t2ADDri killed renamable $r2, 3, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r2, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $lr = nuw nsw t2ADDrs killed renamable $r2, killed renamable $lr, 19, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   t2STRi12 renamable $lr, killed renamable $r3, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.iter.addr)
  ; CHECK:   $lr = t2DLS killed renamable $lr
  ; CHECK:   $r2 = tMOVr killed $lr, 14 /* CC::al */, $noreg
  ; CHECK: bb.1.do.body:
  ; CHECK:   successors: %bb.1(0x7c000000), %bb.2(0x04000000)
  ; CHECK:   liveins: $r0, $r1, $r2, $r12
  ; CHECK:   $lr = tMOVr $r2, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $vpr = MVE_VCTP32 renamable $r12, 0, $noreg
  ; CHECK:   renamable $r2, dead $cpsr = nsw tSUBi8 killed $r2, 1, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $r12 = nsw t2SUBri killed renamable $r12, 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   MVE_VPST 8, implicit $vpr
  ; CHECK:   renamable $r0, renamable $q0 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.02, align 4)
  ; CHECK:   renamable $q0 = MVE_VMULf32 killed renamable $q0, killed renamable $q0, 0, $noreg, undef renamable $q0
  ; CHECK:   MVE_VPST 8, implicit $vpr
  ; CHECK:   renamable $r1 = MVE_VSTRWU32_post killed renamable $q0, killed renamable $r1, 16, 1, killed renamable $vpr :: (store 16 into %ir.pDst.addr.01, align 4)
  ; CHECK:   dead $lr = t2LEUpdate killed renamable $lr, %bb.1
  ; CHECK: bb.2.do.end:
  ; CHECK:   frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
  bb.0.entry:
    successors: %bb.1(0x80000000)
    liveins: $r0, $r1, $r2, $r3, $r7, $lr

    frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, 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
    renamable $lr = t2MOVi 4, 14 /* CC::al */, $noreg, $noreg
    renamable $r12 = t2LSLri renamable $r2, 1, 14 /* CC::al */, $noreg, $noreg
    t2CMPri renamable $r12, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
    t2IT 11, 8, implicit-def $itstate
    $lr = t2LSLri renamable $r2, 1, 11 /* CC::lt */, killed $cpsr, $noreg, implicit killed renamable $lr, implicit killed $itstate
    renamable $r2 = t2RSBrs killed renamable $lr, killed renamable $r2, 10, 14 /* CC::al */, $noreg, $noreg
    renamable $lr = t2ADDri killed renamable $r2, 3, 14 /* CC::al */, $noreg, $noreg
    renamable $r2, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
    renamable $lr = nuw nsw t2ADDrs killed renamable $r2, killed renamable $lr, 19, 14 /* CC::al */, $noreg, $noreg
    t2STRi12 renamable $lr, killed renamable $r3, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.iter.addr)
    $lr = t2DoLoopStart renamable $lr
    $r2 = tMOVr killed $lr, 14 /* CC::al */, $noreg

  bb.1.do.body:
    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
    liveins: $r0, $r1, $r2, $r12

    $lr = tMOVr $r2, 14 /* CC::al */, $noreg
    renamable $vpr = MVE_VCTP32 renamable $r12, 0, $noreg
    renamable $r2, dead $cpsr = nsw tSUBi8 killed $r2, 1, 14 /* CC::al */, $noreg
    renamable $r12 = nsw t2SUBri killed renamable $r12, 4, 14 /* CC::al */, $noreg, $noreg
    MVE_VPST 8, implicit $vpr
    renamable $r0, renamable $q0 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.02, align 4)
    renamable $lr = t2LoopDec killed renamable $lr, 1
    renamable $q0 = MVE_VMULf32 killed renamable $q0, renamable $q0, 0, $noreg, undef renamable $q0
    MVE_VPST 8, implicit $vpr
    renamable $r1 = MVE_VSTRWU32_post killed renamable $q0, killed renamable $r1, 16, 1, killed renamable $vpr :: (store 16 into %ir.pDst.addr.01, align 4)
    t2LoopEnd killed renamable $lr, %bb.1, implicit-def dead $cpsr
    tB %bb.2, 14 /* CC::al */, $noreg

  bb.2.do.end:
    frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc

...
---
name:            it_block_store_count_after_start
alignment:       2
tracksRegLiveness: true
registers:       []
liveins:
  - { reg: '$r0', virtual-reg: '' }
  - { reg: '$r1', virtual-reg: '' }
  - { reg: '$r2', virtual-reg: '' }
  - { reg: '$r3', virtual-reg: '' }
frameInfo:
  stackSize:       8
  offsetAdjustment: 0
  maxAlignment:    4
  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: it_block_store_count_after_start
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r3, $r7
  ; CHECK:   frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, 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:   renamable $lr = t2MOVi 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r12 = t2LSLri renamable $r2, 1, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   t2CMPri renamable $r12, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
  ; CHECK:   t2IT 11, 8, implicit-def $itstate
  ; CHECK:   $lr = t2LSLri renamable $r2, 1, 11 /* CC::lt */, killed $cpsr, $noreg, implicit killed renamable $lr, implicit killed $itstate
  ; CHECK:   renamable $r2 = t2RSBrs killed renamable $lr, killed renamable $r2, 10, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $lr = t2ADDri killed renamable $r2, 3, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   renamable $r2, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $lr = nuw nsw t2ADDrs killed renamable $r2, killed renamable $lr, 19, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   t2STRi12 renamable $lr, killed renamable $r3, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.iter.addr)
  ; CHECK:   $lr = t2DLS killed renamable $lr
  ; CHECK:   $r2 = tMOVr killed $lr, 14 /* CC::al */, $noreg
  ; CHECK: bb.1.do.body:
  ; CHECK:   successors: %bb.1(0x7c000000), %bb.2(0x04000000)
  ; CHECK:   liveins: $r0, $r1, $r2, $r12
  ; CHECK:   $lr = tMOVr $r2, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $vpr = MVE_VCTP32 renamable $r12, 0, $noreg
  ; CHECK:   renamable $r2, dead $cpsr = nsw tSUBi8 killed $r2, 1, 14 /* CC::al */, $noreg
  ; CHECK:   renamable $r12 = nsw t2SUBri killed renamable $r12, 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK:   MVE_VPST 8, implicit $vpr
  ; CHECK:   renamable $r0, renamable $q0 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.02, align 4)
  ; CHECK:   renamable $q0 = MVE_VMULf32 killed renamable $q0, killed renamable $q0, 0, $noreg, undef renamable $q0
  ; CHECK:   MVE_VPST 8, implicit $vpr
  ; CHECK:   renamable $r1 = MVE_VSTRWU32_post killed renamable $q0, killed renamable $r1, 16, 1, killed renamable $vpr :: (store 16 into %ir.pDst.addr.01, align 4)
  ; CHECK:   dead $lr = t2LEUpdate killed renamable $lr, %bb.1
  ; CHECK: bb.2.do.end:
  ; CHECK:   frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
  bb.0.entry:
    successors: %bb.1(0x80000000)
    liveins: $r0, $r1, $r2, $r3, $r7, $lr

    frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, 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
    renamable $lr = t2MOVi 4, 14 /* CC::al */, $noreg, $noreg
    renamable $r12 = t2LSLri renamable $r2, 1, 14 /* CC::al */, $noreg, $noreg
    t2CMPri renamable $r12, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
    t2IT 11, 8, implicit-def $itstate
    $lr = t2LSLri renamable $r2, 1, 11 /* CC::lt */, killed $cpsr, $noreg, implicit killed renamable $lr, implicit killed $itstate
    renamable $r2 = t2RSBrs killed renamable $lr, killed renamable $r2, 10, 14 /* CC::al */, $noreg, $noreg
    renamable $lr = t2ADDri killed renamable $r2, 3, 14 /* CC::al */, $noreg, $noreg
    renamable $r2, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
    renamable $lr = nuw nsw t2ADDrs killed renamable $r2, killed renamable $lr, 19, 14 /* CC::al */, $noreg, $noreg
    t2STRi12 renamable $lr, killed renamable $r3, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.iter.addr)
    $lr = t2DoLoopStart renamable $lr
    $r2 = tMOVr killed $lr, 14 /* CC::al */, $noreg

  bb.1.do.body:
    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
    liveins: $r0, $r1, $r2, $r12

    $lr = tMOVr $r2, 14 /* CC::al */, $noreg
    renamable $vpr = MVE_VCTP32 renamable $r12, 0, $noreg
    renamable $r2, dead $cpsr = nsw tSUBi8 killed $r2, 1, 14 /* CC::al */, $noreg
    renamable $r12 = nsw t2SUBri killed renamable $r12, 4, 14 /* CC::al */, $noreg, $noreg
    MVE_VPST 8, implicit $vpr
    renamable $r0, renamable $q0 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.02, align 4)
    renamable $lr = t2LoopDec killed renamable $lr, 1
    renamable $q0 = MVE_VMULf32 killed renamable $q0, renamable $q0, 0, $noreg, undef renamable $q0
    MVE_VPST 8, implicit $vpr
    renamable $r1 = MVE_VSTRWU32_post killed renamable $q0, killed renamable $r1, 16, 1, killed renamable $vpr :: (store 16 into %ir.pDst.addr.01, align 4)
    t2LoopEnd killed renamable $lr, %bb.1, implicit-def dead $cpsr
    tB %bb.2, 14 /* CC::al */, $noreg

  bb.2.do.end:
    frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc

...