; LLVM IR from Ayon-SSP/The-SDE-Prep :: 1]_Data Structures/3]_Stack (Stackoperation)

; 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.stack = type { i32, i32, ptr }

@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [40 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @create(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @push(ptr noundef, i32 noundef) #0

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: nounwind uwtable
declare dso_local void @pop(ptr noundef) #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @display(i64, ptr, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.stack, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.8, ptr noundef %3)
  %9 = load i32, ptr %3, align 4, !tbaa !5
  call void @create(ptr noundef %2, i32 noundef %9)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %10 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.8, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %12 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %12, ptr %5, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %17, %0
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = add nsw i32 %14, -1
  store i32 %15, ptr %4, align 4, !tbaa !5
  %16 = icmp ne i32 %14, 0
  br i1 %16, label %17, label %21

17:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.10)
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.8, ptr noundef %6)
  %20 = load i32, ptr %6, align 4, !tbaa !5
  call void @push(ptr noundef %2, i32 noundef %20)
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %13, !llvm.loop !9

21:                                               ; preds = %13
  %22 = call i32 (ptr, ...) @printf(ptr noundef @.str.11)
  call void @pop(ptr noundef %2)
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = getelementptr inbounds { i64, ptr }, ptr %2, i32 0, i32 0
  %26 = load i64, ptr %25, align 8
  %27 = getelementptr inbounds { i64, ptr }, ptr %2, i32 0, i32 1
  %28 = load ptr, ptr %27, align 8
  call void @display(i64 %26, ptr %28, i32 noundef %24)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #3
  %29 = load i32, ptr %1, align 4
  ret i32 %29
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

attributes #0 = { 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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

%struct.stack = type { i32, i32, ptr }

@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [40 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @create(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @push(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @pop(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: nounwind uwtable
declare dso_local void @display(i64, ptr, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.stack, align 8
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.8, ptr noundef nonnull %2)
  %7 = load i32, ptr %2, align 4, !tbaa !5
  call void @create(ptr noundef nonnull %1, i32 noundef %7)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.9)
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.8, ptr noundef nonnull %3)
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr %3, align 4, !tbaa !5
  %.not2 = icmp eq i32 %10, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.10)
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.8, ptr noundef nonnull %4)
  %14 = load i32, ptr %4, align 4, !tbaa !5
  call void @push(ptr noundef nonnull %1, i32 noundef %14)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  %.pr = load i32, ptr %3, align 4, !tbaa !5
  %15 = add nsw i32 %.pr, -1
  store i32 %15, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %.pr, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.11)
  call void @pop(ptr noundef nonnull %1)
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %18 = load i64, ptr %1, align 8
  %19 = getelementptr inbounds i8, ptr %1, i64 8
  %20 = load ptr, ptr %19, align 8
  call void @display(i64 %18, ptr %20, i32 noundef %10)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { 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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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