; LLVM IR from chachaxw/data-structure-and-algorithm :: leetcode/greedy_algorithm (wiggle_subsequence)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN8Solution15wiggleMaxLengthERSt6vectorIiSaIiEE(ptr noundef nonnull align 4 dereferenceable(8040) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) #0 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #2
  %13 = icmp ule i64 %12, 1
  br i1 %13, label %14, label %18

14:                                               ; preds = %2
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %15) #2
  %17 = trunc i64 %16 to i32
  store i32 %17, ptr %3, align 4
  br label %61

18:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 1, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %56, %18
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %22) #2
  %24 = sub i64 %23, 1
  %25 = icmp ult i64 %21, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %59

27:                                               ; preds = %19
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  %31 = sext i32 %30 to i64
  %32 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %28, i64 noundef %31) #2
  %33 = load i32, ptr %32, align 4, !tbaa !9
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load i32, ptr %9, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %34, i64 noundef %36) #2
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = sub nsw i32 %33, %38
  store i32 %39, ptr %6, align 4, !tbaa !9
  %40 = load i32, ptr %6, align 4, !tbaa !9
  %41 = icmp sgt i32 %40, 0
  br i1 %41, label %42, label %45

42:                                               ; preds = %27
  %43 = load i32, ptr %7, align 4, !tbaa !9
  %44 = icmp sle i32 %43, 0
  br i1 %44, label %51, label %45

45:                                               ; preds = %42, %27
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = icmp slt i32 %46, 0
  br i1 %47, label %48, label %55

48:                                               ; preds = %45
  %49 = load i32, ptr %7, align 4, !tbaa !9
  %50 = icmp sge i32 %49, 0
  br i1 %50, label %51, label %55

51:                                               ; preds = %48, %42
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %8, align 4, !tbaa !9
  %54 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %54, ptr %7, align 4, !tbaa !9
  br label %55

55:                                               ; preds = %51, %48, %45
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %9, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %9, align 4, !tbaa !9
  br label %19, !llvm.loop !11

59:                                               ; preds = %26
  %60 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %60, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %61

61:                                               ; preds = %59, %14
  %62 = load i32, ptr %3, align 4
  ret i32 %62
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 willreturn memory(argmem: readwrite) }
attributes #2 = { 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"}


; 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 i32 @_ZN8Solution15wiggleMaxLengthERSt6vectorIiSaIiEE(ptr nocapture noundef nonnull readnone align 4 dereferenceable(8040) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) local_unnamed_addr #0 align 2 {
  %3 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #1
  %4 = icmp ult i64 %3, 2
  %5 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #1
  br i1 %4, label %6, label %.preheader

.preheader:                                       ; preds = %2
  %.not = icmp eq i64 %5, 1
  br i1 %.not, label %.loopexit, label %.lr.ph

6:                                                ; preds = %2
  %7 = trunc i64 %5 to i32
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %20
  %indvars.iv = phi i64 [ %indvars.iv.next, %20 ], [ 0, %.preheader ]
  %.02026 = phi i32 [ %.1, %20 ], [ 1, %.preheader ]
  %.02125 = phi i32 [ %.122, %20 ], [ 0, %.preheader ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %8 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %indvars.iv.next) #1
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %indvars.iv) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sub nsw i32 %9, %11
  %13 = icmp sgt i32 %12, 0
  %14 = icmp slt i32 %.02125, 1
  %or.cond = select i1 %13, i1 %14, i1 false
  br i1 %or.cond, label %18, label %15

15:                                               ; preds = %.lr.ph
  %16 = icmp slt i32 %12, 0
  %17 = icmp sgt i32 %.02125, -1
  %or.cond3 = select i1 %16, i1 %17, i1 false
  br i1 %or.cond3, label %18, label %20

18:                                               ; preds = %15, %.lr.ph
  %19 = add nsw i32 %.02026, 1
  br label %20

20:                                               ; preds = %15, %18
  %.122 = phi i32 [ %12, %18 ], [ %.02125, %15 ]
  %.1 = phi i32 [ %19, %18 ], [ %.02026, %15 ]
  %21 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #1
  %22 = add i64 %21, -1
  %23 = icmp ugt i64 %22, %indvars.iv.next
  br i1 %23, label %.lr.ph, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %20, %.preheader, %6
  %.023 = phi i32 [ %7, %6 ], [ 1, %.preheader ], [ %.1, %20 ]
  ret i32 %.023
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass