; LLVM IR from Lut1n/ImpGears :: src/ImpGears/Geometry/Path.ll (ZNK3imp4Path10cycleIndexEi)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK3imp4Path10cycleIndexEi(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %7 = call noundef i32 @_ZNK3imp4Path5countEv(ptr noundef nonnull align 8 dereferenceable(48) %6)
  store i32 %7, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %12, %2
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp sge i32 %9, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %8
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = sub nsw i32 %14, %13
  store i32 %15, ptr %4, align 4, !tbaa !9
  br label %8, !llvm.loop !11

16:                                               ; preds = %8
  br label %17

17:                                               ; preds = %20, %16
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = icmp slt i32 %18, 0
  br i1 %19, label %20, label %24

20:                                               ; preds = %17
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = add nsw i32 %22, %21
  store i32 %23, ptr %4, align 4, !tbaa !9
  br label %17, !llvm.loop !13

24:                                               ; preds = %17
  %25 = load i32, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %25
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK3imp4Path5countEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 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 #3 = { 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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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: mustprogress nounwind uwtable
define dso_local noundef range(i32 0, -2147483648) i32 @_ZNK3imp4Path10cycleIndexEi(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = tail call noundef i32 @_ZNK3imp4Path5countEv(ptr noundef nonnull align 8 dereferenceable(48) %0)
  %4 = sub i32 0, %1
  br label %5

5:                                                ; preds = %5, %2
  %indvars.iv = phi i32 [ %indvars.iv.next, %5 ], [ %4, %2 ]
  %.0 = phi i32 [ %6, %5 ], [ %1, %2 ]
  %.not = icmp slt i32 %.0, %3
  %6 = sub nsw i32 %.0, %3
  %indvars.iv.next = add i32 %indvars.iv, %3
  br i1 %.not, label %.preheader.preheader, label %5, !llvm.loop !5

.preheader.preheader:                             ; preds = %5
  %smax = tail call i32 @llvm.smax.i32(i32 %.0, i32 0)
  %7 = add i32 %smax, %indvars.iv
  %8 = icmp ne i32 %7, 0
  %umin = zext i1 %8 to i32
  %9 = sub i32 %7, %umin
  %umax = tail call i32 @llvm.umax.i32(i32 %3, i32 1)
  %10 = udiv i32 %9, %umax
  %11 = add i32 %10, %umin
  %12 = mul i32 %3, %11
  %13 = add i32 %.0, %12
  ret i32 %13
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK3imp4Path5countEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umax.i32(i32, i32) #1

attributes #0 = { 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 speculatable willreturn memory(none) }

!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: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass