; LLVM IR from sp-nitech/SPTK :: third_party/REAPER/core/track.ll (ZNK4sptk6reaper5Track10IndexBelowEf)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef float @_ZNK4sptk6reaper5Track1tEi(ptr noundef nonnull align 8 dereferenceable(72), i32 noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK4sptk6reaper5Track10IndexBelowEf(ptr noundef nonnull align 8 dereferenceable(72) %0, float noundef %1) #3 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca float, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store float %1, ptr %5, align 4, !tbaa !9
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 1, ptr %6, align 4, !tbaa !11
  br label %9

9:                                                ; preds = %23, %2
  %10 = load i32, ptr %6, align 4, !tbaa !11
  %11 = call noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72) %8)
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %7, align 4
  br label %26

14:                                               ; preds = %9
  %15 = load float, ptr %5, align 4, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !11
  %17 = call noundef float @_ZNK4sptk6reaper5Track1tEi(ptr noundef nonnull align 8 dereferenceable(72) %8, i32 noundef %16)
  %18 = fcmp ole float %15, %17
  br i1 %18, label %19, label %22

19:                                               ; preds = %14
  %20 = load i32, ptr %6, align 4, !tbaa !11
  %21 = sub nsw i32 %20, 1
  store i32 %21, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %26

22:                                               ; preds = %14
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %6, align 4, !tbaa !11
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %6, align 4, !tbaa !11
  br label %9, !llvm.loop !13

26:                                               ; preds = %19, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %27 = load i32, ptr %7, align 4
  switch i32 %27, label %33 [
    i32 2, label %28
    i32 1, label %31
  ]

28:                                               ; preds = %26
  %29 = call noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72) %8)
  %30 = sub nsw i32 %29, 1
  store i32 %30, ptr %3, align 4
  br label %31

31:                                               ; preds = %28, %26
  %32 = load i32, ptr %3, align 4
  ret i32 %32

33:                                               ; preds = %26
  unreachable
}

attributes #0 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef float @_ZNK4sptk6reaper5Track1tEi(ptr noundef nonnull align 8 dereferenceable(72), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK4sptk6reaper5Track10IndexBelowEf(ptr noundef nonnull align 8 dereferenceable(72) %0, float noundef %1) local_unnamed_addr #2 align 2 {
  %3 = tail call noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72) %0)
  %4 = icmp sgt i32 %3, 1
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %7
  %.0714 = phi i32 [ %8, %7 ], [ 1, %2 ]
  %5 = tail call noundef float @_ZNK4sptk6reaper5Track1tEi(ptr noundef nonnull align 8 dereferenceable(72) %0, i32 noundef %.0714)
  %6 = fcmp ult float %5, %1
  br i1 %6, label %7, label %.loopexit

7:                                                ; preds = %.lr.ph
  %8 = add nuw nsw i32 %.0714, 1
  %9 = tail call noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72) %0)
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %7, %2
  %11 = tail call noundef i32 @_ZNK4sptk6reaper5Track10num_framesEv(ptr noundef nonnull align 8 dereferenceable(72) %0)
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %._crit_edge
  %.1.in = phi i32 [ %11, %._crit_edge ], [ %.0714, %.lr.ph ]
  %.1 = add nsw i32 %.1.in, -1
  ret i32 %.1
}

attributes #0 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { inlinehint mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass