# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv8.1m.main-none-eabi -mcpu=cortex-m85 -mattr=+use-mipipeliner -run-pass=pipeliner -o - %s | FileCheck %s --check-prefix=CHECK

--- |
  define hidden float @dot(float* nocapture noundef readonly %a, float* nocapture noundef readonly %b, i32 noundef %sz) local_unnamed_addr #0 {
  entry:
    %cmp8 = icmp sgt i32 %sz, 0
    br i1 %cmp8, label %for.body.preheader, label %for.end

  for.body.preheader:                               ; preds = %entry
    %scevgep = getelementptr float, float* %b, i32 -1
    %scevgep4 = getelementptr float, float* %a, i32 -1
    br label %for.body

  for.body:                                         ; preds = %for.body.preheader, %for.body
    %lsr.iv5 = phi float* [ %scevgep4, %for.body.preheader ], [ %scevgep6, %for.body ]
    %lsr.iv1 = phi float* [ %scevgep, %for.body.preheader ], [ %scevgep2, %for.body ]
    %lsr.iv = phi i32 [ %sz, %for.body.preheader ], [ %lsr.iv.next, %for.body ]
    %sum.010 = phi float [ %add, %for.body ], [ 0.000000e+00, %for.body.preheader ]
    %scevgep7 = getelementptr float, float* %lsr.iv5, i32 1
    %0 = load float, float* %scevgep7, align 4
    %scevgep3 = getelementptr float, float* %lsr.iv1, i32 1
    %1 = load float, float* %scevgep3, align 4
    %mul = fmul fast float %1, %0
    %add = fadd fast float %mul, %sum.010
    %lsr.iv.next = add i32 %lsr.iv, -1
    %scevgep2 = getelementptr float, float* %lsr.iv1, i32 1
    %scevgep6 = getelementptr float, float* %lsr.iv5, i32 1
    %exitcond.not = icmp eq i32 %lsr.iv.next, 0
    br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !0

  for.end:                                          ; preds = %for.body, %entry
    %sum.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ]
    ret float %sum.0.lcssa
  }

  !0 = distinct !{!0, !1, !2, !3}
  !1 = !{!"llvm.loop.mustprogress"}
  !2 = !{!"llvm.loop.unroll.disable"}
  !3 = !{!"llvm.loop.pipeline.initiationinterval", i32 3}

...
---
name:            dot
alignment:       2
tracksRegLiveness: true
constants:
  - id:              0
    value:           'float 0.000000e+00'
    alignment:       4
    isTargetSpecific: false
body:             |
  ; CHECK-LABEL: name: dot
  ; CHECK: bb.0.entry:
  ; CHECK-NEXT:   successors: %bb.2(0x50000000), %bb.1(0x30000000)
  ; CHECK-NEXT:   liveins: $r0, $r1, $r2
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gprnopc = COPY $r2
  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gprnopc = COPY $r1
  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:gprnopc = COPY $r0
  ; CHECK-NEXT:   t2CMPri [[COPY]], 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
  ; CHECK-NEXT:   t2Bcc %bb.2, 10 /* CC::ge */, $cpsr
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1:
  ; CHECK-NEXT:   successors: %bb.4(0x80000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[VLDRS:%[0-9]+]]:spr = VLDRS %const.0, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool)
  ; CHECK-NEXT:   t2B %bb.4, 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2.for.body.preheader:
  ; CHECK-NEXT:   successors: %bb.5(0x80000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[t2SUBri:%[0-9]+]]:rgpr = t2SUBri [[COPY1]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:gprnopc = COPY [[t2SUBri]]
  ; CHECK-NEXT:   [[t2SUBri1:%[0-9]+]]:rgpr = t2SUBri [[COPY2]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[VLDRS1:%[0-9]+]]:spr = VLDRS %const.0, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool)
  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:gprnopc = COPY [[t2SUBri1]]
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.5.for.body:
  ; CHECK-NEXT:   successors: %bb.6(0x40000000), %bb.9(0x40000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[t2ADDri:%[0-9]+]]:rgpr = t2ADDri [[COPY4]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[VLDRS2:%[0-9]+]]:spr = VLDRS [[COPY4]], 1, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep7)
  ; CHECK-NEXT:   [[t2ADDri1:%[0-9]+]]:rgpr = t2ADDri [[COPY3]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[VLDRS3:%[0-9]+]]:spr = VLDRS [[COPY3]], 1, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep3)
  ; CHECK-NEXT:   [[VMULS:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VMULS [[VLDRS3]], [[VLDRS2]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   [[t2SUBri2:%[0-9]+]]:rgpr = t2SUBri [[COPY]], 1, 14 /* CC::al */, $noreg, def $cpsr
  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:gprnopc = COPY [[t2SUBri2]]
  ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:gprnopc = COPY [[t2ADDri1]]
  ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:gprnopc = COPY [[t2ADDri]]
  ; CHECK-NEXT:   t2Bcc %bb.9, 0 /* CC::eq */, $cpsr
  ; CHECK-NEXT:   t2B %bb.6, 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.6.for.body:
  ; CHECK-NEXT:   successors: %bb.7(0x80000000), %bb.8(0x00000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[t2ADDri2:%[0-9]+]]:rgpr = t2ADDri [[COPY7]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[VLDRS4:%[0-9]+]]:spr = VLDRS [[COPY7]], 1, 14 /* CC::al */, $noreg :: (load unknown-size from %ir.scevgep7, align 4)
  ; CHECK-NEXT:   [[t2ADDri3:%[0-9]+]]:rgpr = t2ADDri [[COPY6]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[VLDRS5:%[0-9]+]]:spr = VLDRS [[COPY6]], 1, 14 /* CC::al */, $noreg :: (load unknown-size from %ir.scevgep3, align 4)
  ; CHECK-NEXT:   [[VMULS1:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VMULS [[VLDRS5]], [[VLDRS4]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   [[t2SUBri3:%[0-9]+]]:rgpr = t2SUBri [[COPY5]], 1, 14 /* CC::al */, $noreg, def $cpsr
  ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:gpr = COPY [[t2SUBri3]]
  ; CHECK-NEXT:   [[COPY9:%[0-9]+]]:gpr = COPY [[t2ADDri3]]
  ; CHECK-NEXT:   [[COPY10:%[0-9]+]]:gpr = COPY [[t2ADDri2]]
  ; CHECK-NEXT:   t2Bcc %bb.8, 0 /* CC::eq */, $cpsr
  ; CHECK-NEXT:   t2B %bb.7, 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.7.for.body:
  ; CHECK-NEXT:   successors: %bb.8(0x04000000), %bb.7(0x7c000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[PHI:%[0-9]+]]:gprnopc = PHI [[COPY10]], %bb.6, %49, %bb.7
  ; CHECK-NEXT:   [[PHI1:%[0-9]+]]:gprnopc = PHI [[COPY9]], %bb.6, %50, %bb.7
  ; CHECK-NEXT:   [[PHI2:%[0-9]+]]:gprnopc = PHI [[COPY8]], %bb.6, %51, %bb.7
  ; CHECK-NEXT:   [[PHI3:%[0-9]+]]:spr = PHI [[VLDRS1]], %bb.6, %43, %bb.7
  ; CHECK-NEXT:   [[PHI4:%[0-9]+]]:spr = PHI [[VMULS1]], %bb.6, %52, %bb.7
  ; CHECK-NEXT:   [[PHI5:%[0-9]+]]:spr = PHI [[VMULS]], %bb.6, [[PHI4]], %bb.7
  ; CHECK-NEXT:   [[VADDS:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VADDS [[PHI5]], [[PHI3]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   [[t2SUBri4:%[0-9]+]]:rgpr = t2SUBri [[PHI2]], 1, 14 /* CC::al */, $noreg, def $cpsr
  ; CHECK-NEXT:   [[VLDRS6:%[0-9]+]]:spr = VLDRS [[PHI1]], 1, 14 /* CC::al */, $noreg :: (load unknown-size from %ir.scevgep3, align 4)
  ; CHECK-NEXT:   [[VLDRS7:%[0-9]+]]:spr = VLDRS [[PHI]], 1, 14 /* CC::al */, $noreg :: (load unknown-size from %ir.scevgep7, align 4)
  ; CHECK-NEXT:   [[t2ADDri4:%[0-9]+]]:rgpr = t2ADDri [[PHI]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[t2ADDri5:%[0-9]+]]:rgpr = t2ADDri [[PHI1]], 4, 14 /* CC::al */, $noreg, $noreg
  ; CHECK-NEXT:   [[COPY11:%[0-9]+]]:gpr = COPY [[t2ADDri4]]
  ; CHECK-NEXT:   [[COPY12:%[0-9]+]]:gpr = COPY [[t2ADDri5]]
  ; CHECK-NEXT:   [[COPY13:%[0-9]+]]:gpr = COPY [[t2SUBri4]]
  ; CHECK-NEXT:   [[VMULS2:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VMULS [[VLDRS6]], [[VLDRS7]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   t2Bcc %bb.7, 1 /* CC::ne */, $cpsr
  ; CHECK-NEXT:   t2B %bb.8, 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.8:
  ; CHECK-NEXT:   successors: %bb.9(0x80000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[PHI6:%[0-9]+]]:spr = PHI [[VLDRS1]], %bb.6, [[VADDS]], %bb.7
  ; CHECK-NEXT:   [[PHI7:%[0-9]+]]:spr = PHI [[VMULS1]], %bb.6, [[VMULS2]], %bb.7
  ; CHECK-NEXT:   [[PHI8:%[0-9]+]]:spr = PHI [[VMULS]], %bb.6, [[PHI4]], %bb.7
  ; CHECK-NEXT:   [[VADDS1:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VADDS [[PHI8]], [[PHI6]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.9:
  ; CHECK-NEXT:   successors: %bb.4(0x80000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[PHI9:%[0-9]+]]:spr = PHI [[VLDRS1]], %bb.5, [[VADDS1]], %bb.8
  ; CHECK-NEXT:   [[PHI10:%[0-9]+]]:spr = PHI [[VMULS]], %bb.5, [[PHI7]], %bb.8
  ; CHECK-NEXT:   [[VADDS2:%[0-9]+]]:spr = nnan ninf nsz arcp contract afn reassoc VADDS [[PHI10]], [[PHI9]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   t2B %bb.4, 14 /* CC::al */, $noreg
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.4.for.end:
  ; CHECK-NEXT:   [[PHI11:%[0-9]+]]:spr = PHI [[VLDRS]], %bb.1, [[VADDS2]], %bb.9
  ; CHECK-NEXT:   [[VMOVRS:%[0-9]+]]:gpr = VMOVRS [[PHI11]], 14 /* CC::al */, $noreg
  ; CHECK-NEXT:   $r0 = COPY [[VMOVRS]]
  ; CHECK-NEXT:   tBX_RET 14 /* CC::al */, $noreg, implicit $r0
  bb.0.entry:
    successors: %bb.1(0x50000000), %bb.4(0x30000000)
    liveins: $r0, $r1, $r2

    %13:gprnopc = COPY $r2
    %12:gprnopc = COPY $r1
    %11:gprnopc = COPY $r0
    t2CMPri %13, 1, 14 /* CC::al */, $noreg, implicit-def $cpsr
    t2Bcc %bb.1, 10 /* CC::ge */, $cpsr

  bb.4:
    successors: %bb.3(0x80000000)

    %14:spr = VLDRS %const.0, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool)
    t2B %bb.3, 14 /* CC::al */, $noreg

  bb.1.for.body.preheader:
    successors: %bb.2(0x80000000)

    %16:rgpr = t2SUBri %12, 4, 14 /* CC::al */, $noreg, $noreg
    %0:gpr = COPY %16
    %17:rgpr = t2SUBri %11, 4, 14 /* CC::al */, $noreg, $noreg
    %15:spr = VLDRS %const.0, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool)
    %1:gpr = COPY %17

  bb.2.for.body:
    successors: %bb.3(0x04000000), %bb.2(0x7c000000)

    %2:gprnopc = PHI %1, %bb.1, %9, %bb.2
    %3:gprnopc = PHI %0, %bb.1, %8, %bb.2
    %4:gprnopc = PHI %13, %bb.1, %7, %bb.2
    %5:spr = PHI %15, %bb.1, %6, %bb.2
    %18:rgpr = t2ADDri %2, 4, 14 /* CC::al */, $noreg, $noreg
    %19:spr = VLDRS %2, 1, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep7)
    %20:rgpr = t2ADDri %3, 4, 14 /* CC::al */, $noreg, $noreg
    %21:spr = VLDRS %3, 1, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep3)
    %22:spr = nnan ninf nsz arcp contract afn reassoc VMULS killed %21, killed %19, 14 /* CC::al */, $noreg
    %6:spr = nnan ninf nsz arcp contract afn reassoc VADDS killed %22, %5, 14 /* CC::al */, $noreg
    %23:rgpr = t2SUBri %4, 1, 14 /* CC::al */, $noreg, def $cpsr
    %7:gpr = COPY %23
    %8:gpr = COPY %20
    %9:gpr = COPY %18
    t2Bcc %bb.2, 1 /* CC::ne */, $cpsr
    t2B %bb.3, 14 /* CC::al */, $noreg

  bb.3.for.end:
    %10:spr = PHI %14, %bb.4, %6, %bb.2
    %24:gpr = VMOVRS %10, 14 /* CC::al */, $noreg
    $r0 = COPY %24
    tBX_RET 14 /* CC::al */, $noreg, implicit $r0

...