; LLVM IR from upupming/algorithm :: kick-start/2021/RoundD/D.ll (Z6changeiii)

; 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"

%struct.SegmentTree = type { i32, i32, i32 }

@tree = external dso_local global [2000040 x %struct.SegmentTree], align 16

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6changeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %9
  %11 = getelementptr inbounds %struct.SegmentTree, ptr %10, i32 0, i32 0
  %12 = load i32, ptr %11, align 4, !tbaa !9
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %14
  %16 = getelementptr inbounds %struct.SegmentTree, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = icmp eq i32 %12, %17
  br i1 %18, label %19, label %25

19:                                               ; preds = %3
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %22
  %24 = getelementptr inbounds %struct.SegmentTree, ptr %23, i32 0, i32 2
  store i32 %20, ptr %24, align 4, !tbaa !12
  br label %70

25:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %27
  %29 = getelementptr inbounds %struct.SegmentTree, ptr %28, i32 0, i32 0
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %32
  %34 = getelementptr inbounds %struct.SegmentTree, ptr %33, i32 0, i32 1
  %35 = load i32, ptr %34, align 4, !tbaa !11
  %36 = add nsw i32 %30, %35
  %37 = ashr i32 %36, 1
  store i32 %37, ptr %7, align 4, !tbaa !5
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = icmp sle i32 %38, %39
  br i1 %40, label %41, label %46

41:                                               ; preds = %25
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = mul nsw i32 2, %42
  %44 = load i32, ptr %5, align 4, !tbaa !5
  %45 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6changeiii(i32 noundef %43, i32 noundef %44, i32 noundef %45)
  br label %52

46:                                               ; preds = %25
  %47 = load i32, ptr %4, align 4, !tbaa !5
  %48 = mul nsw i32 2, %47
  %49 = add nsw i32 %48, 1
  %50 = load i32, ptr %5, align 4, !tbaa !5
  %51 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6changeiii(i32 noundef %49, i32 noundef %50, i32 noundef %51)
  br label %52

52:                                               ; preds = %46, %41
  %53 = load i32, ptr %4, align 4, !tbaa !5
  %54 = mul nsw i32 2, %53
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %55
  %57 = getelementptr inbounds %struct.SegmentTree, ptr %56, i32 0, i32 2
  %58 = load i32, ptr %4, align 4, !tbaa !5
  %59 = mul nsw i32 2, %58
  %60 = add nsw i32 %59, 1
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %61
  %63 = getelementptr inbounds %struct.SegmentTree, ptr %62, i32 0, i32 2
  %64 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %57, ptr noundef nonnull align 4 dereferenceable(4) %63)
  %65 = load i32, ptr %64, align 4, !tbaa !5
  %66 = load i32, ptr %4, align 4, !tbaa !5
  %67 = sext i32 %66 to i64
  %68 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %67
  %69 = getelementptr inbounds %struct.SegmentTree, ptr %68, i32 0, i32 2
  store i32 %65, ptr %69, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %70

70:                                               ; preds = %52, %19
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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" }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS11SegmentTree", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, i64 8}


; 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"

%struct.SegmentTree = type { i32, i32, i32 }

@tree = external dso_local global [2000040 x %struct.SegmentTree], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6changeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %5, i64 4
  %8 = load i32, ptr %7, align 4, !tbaa !10
  %9 = icmp eq i32 %6, %8
  br i1 %9, label %24, label %10

10:                                               ; preds = %3
  %11 = add nsw i32 %8, %6
  %12 = ashr i32 %11, 1
  %.not = icmp slt i32 %12, %1
  %13 = shl nsw i32 %0, 1
  br i1 %.not, label %15, label %14

14:                                               ; preds = %10
  tail call void @_Z6changeiii(i32 noundef %13, i32 noundef %1, i32 noundef %2)
  %.pre = or disjoint i32 %13, 1
  br label %17

15:                                               ; preds = %10
  %16 = or disjoint i32 %13, 1
  tail call void @_Z6changeiii(i32 noundef %16, i32 noundef %1, i32 noundef %2)
  br label %17

17:                                               ; preds = %15, %14
  %.pre-phi19 = phi i32 [ %16, %15 ], [ %.pre, %14 ]
  %18 = sext i32 %13 to i64
  %19 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %18, i32 2
  %20 = sext i32 %.pre-phi19 to i64
  %21 = getelementptr inbounds [2000040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %20, i32 2
  %22 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %19, ptr noundef nonnull align 4 dereferenceable(4) %21)
  %23 = load i32, ptr %22, align 4, !tbaa !11
  br label %24

24:                                               ; preds = %3, %17
  %.sink = phi i32 [ %23, %17 ], [ %2, %3 ]
  %25 = getelementptr inbounds i8, ptr %5, i64 8
  store i32 %.sink, ptr %25, align 4, !tbaa !12
  ret void
}

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 = { 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" }

!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, !7, i64 0}
!6 = !{!"_ZTS11SegmentTree", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!7, !7, i64 0}
!12 = !{!6, !7, i64 8}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass