; LLVM IR from AlgoGenesis/C :: Divide and Conquer/Skyline Problem (Program)

; 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.Building = type { i32, i32, i32 }
%struct.Point = type { i32, i32 }

@.str = external hidden unnamed_addr constant [32 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [74 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [10 x i8], align 1

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

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

; Function Attrs: nounwind uwtable
declare dso_local ptr @findSkyline(ptr noundef, i32 noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %8 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = mul i64 %11, 12
  %13 = call noalias ptr @malloc(i64 noundef %12) #6
  store ptr %13, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %39, %0
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %42

19:                                               ; preds = %14
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  %22 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %21)
  %23 = load ptr, ptr %3, align 8, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds %struct.Building, ptr %23, i64 %25
  %27 = getelementptr inbounds %struct.Building, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %3, align 8, !tbaa !9
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds %struct.Building, ptr %28, i64 %30
  %32 = getelementptr inbounds %struct.Building, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %3, align 8, !tbaa !9
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds %struct.Building, ptr %33, i64 %35
  %37 = getelementptr inbounds %struct.Building, ptr %36, i32 0, i32 2
  %38 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.3, ptr noundef %27, ptr noundef %32, ptr noundef %37)
  br label %39

39:                                               ; preds = %19
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %4, align 4, !tbaa !5
  br label %14, !llvm.loop !11

42:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %43 = load ptr, ptr %3, align 8, !tbaa !9
  %44 = load i32, ptr %2, align 4, !tbaa !5
  %45 = sub nsw i32 %44, 1
  %46 = call ptr @findSkyline(ptr noundef %43, i32 noundef 0, i32 noundef %45, ptr noundef %5)
  store ptr %46, ptr %6, align 8, !tbaa !9
  %47 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %48

48:                                               ; preds = %67, %42
  %49 = load i32, ptr %7, align 4, !tbaa !5
  %50 = load i32, ptr %5, align 4, !tbaa !5
  %51 = icmp slt i32 %49, %50
  br i1 %51, label %53, label %52

52:                                               ; preds = %48
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %70

53:                                               ; preds = %48
  %54 = load ptr, ptr %6, align 8, !tbaa !9
  %55 = load i32, ptr %7, align 4, !tbaa !5
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds %struct.Point, ptr %54, i64 %56
  %58 = getelementptr inbounds %struct.Point, ptr %57, i32 0, i32 0
  %59 = load i32, ptr %58, align 4, !tbaa !13
  %60 = load ptr, ptr %6, align 8, !tbaa !9
  %61 = load i32, ptr %7, align 4, !tbaa !5
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds %struct.Point, ptr %60, i64 %62
  %64 = getelementptr inbounds %struct.Point, ptr %63, i32 0, i32 1
  %65 = load i32, ptr %64, align 4, !tbaa !15
  %66 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i32 noundef %59, i32 noundef %65)
  br label %67

67:                                               ; preds = %53
  %68 = load i32, ptr %7, align 4, !tbaa !5
  %69 = add nsw i32 %68, 1
  store i32 %69, ptr %7, align 4, !tbaa !5
  br label %48, !llvm.loop !16

70:                                               ; preds = %52
  %71 = load ptr, ptr %6, align 8, !tbaa !9
  call void @free(ptr noundef %71) #5
  %72 = load ptr, ptr %3, align 8, !tbaa !9
  call void @free(ptr noundef %72) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  ret i32 0
}

declare i32 @printf(ptr noundef, ...) #3

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

; Function Attrs: nounwind
declare void @free(ptr noundef) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 = { 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 = { "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 "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 #5 = { nounwind }
attributes #6 = { nounwind allocsize(0) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !6, i64 0}
!14 = !{!"Point", !6, i64 0, !6, i64 4}
!15 = !{!14, !6, i64 4}
!16 = distinct !{!16, !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"

%struct.Building = type { i32, i32, i32 }
%struct.Point = type { i32, i32 }

@.str = external hidden unnamed_addr constant [32 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [74 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [10 x i8], align 1

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

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

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

; Function Attrs: nounwind uwtable
declare dso_local ptr @findSkyline(ptr noundef, i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = mul nsw i64 %6, 12
  %8 = call noalias ptr @malloc(i64 noundef %7) #6
  %9 = icmp sgt i32 %5, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.lcssa = phi i32 [ %5, %0 ], [ %21, %.lr.ph ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  store i32 0, ptr %2, align 4, !tbaa !5
  %10 = add nsw i32 %.lcssa, -1
  %11 = call ptr @findSkyline(ptr noundef %8, i32 noundef 0, i32 noundef %10, ptr noundef nonnull %2)
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, 0
  br i1 %14, label %.lr.ph21, label %._crit_edge22

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = trunc nuw nsw i64 %indvars.iv.next to i32
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %15)
  %17 = getelementptr inbounds %struct.Building, ptr %8, i64 %indvars.iv
  %18 = getelementptr inbounds i8, ptr %17, i64 4
  %19 = getelementptr inbounds i8, ptr %17, i64 8
  %20 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.3, ptr noundef %17, ptr noundef nonnull %18, ptr noundef nonnull %19)
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = icmp slt i64 %indvars.iv.next, %22
  br i1 %23, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge22:                                    ; preds = %.lr.ph21, %._crit_edge
  call void @free(ptr noundef %11) #5
  call void @free(ptr noundef %8) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0

.lr.ph21:                                         ; preds = %._crit_edge, %.lr.ph21
  %indvars.iv25 = phi i64 [ %indvars.iv.next26, %.lr.ph21 ], [ 0, %._crit_edge ]
  %24 = getelementptr inbounds %struct.Point, ptr %11, i64 %indvars.iv25
  %25 = load i32, ptr %24, align 4, !tbaa !11
  %26 = getelementptr inbounds i8, ptr %24, i64 4
  %27 = load i32, ptr %26, align 4, !tbaa !13
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i32 noundef %25, i32 noundef %27)
  %indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = icmp slt i64 %indvars.iv.next26, %30
  br i1 %31, label %.lr.ph21, label %._crit_edge22, !llvm.loop !14
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #4

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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 = { nofree nounwind "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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #5 = { nounwind }
attributes #6 = { nounwind allocsize(0) }

!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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 0}
!12 = !{!"Point", !6, i64 0, !6, i64 4}
!13 = !{!12, !6, i64 4}
!14 = distinct !{!14, !10}


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