; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Linear/Stack/Applications of Stack/undo-redo demo/C (main)

; 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"

@.str.18 = external hidden unnamed_addr constant [23 x i8], align 1

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @printf(ptr noundef, ...) #2

; Function Attrs: nounwind uwtable
declare dso_local void @printMenu() #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @operate(ptr noundef, i32 noundef, i8 noundef signext, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = call ptr @createStack(i32 noundef 10)
  store ptr %8, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %9 = call ptr @createStack(i32 noundef 10)
  store ptr %9, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %26, %0
  br label %11

11:                                               ; preds = %10
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.18, i32 noundef %12)
  call void @printMenu()
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @getUserInput(ptr noundef %5, ptr noundef %6)
  %14 = load i8, ptr %5, align 1, !tbaa !11
  %15 = sext i8 %14 to i32
  %16 = icmp ne i32 %15, 101
  br i1 %16, label %17, label %22

17:                                               ; preds = %11
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = load i8, ptr %5, align 1, !tbaa !11
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  call void @operate(ptr noundef %4, i32 noundef %18, i8 noundef signext %19, ptr noundef %20, ptr noundef %21)
  br label %23

22:                                               ; preds = %11
  store i32 3, ptr %7, align 4
  br label %24

23:                                               ; preds = %17
  store i32 0, ptr %7, align 4
  br label %24

24:                                               ; preds = %23, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  %25 = load i32, ptr %7, align 4
  switch i32 %25, label %29 [
    i32 0, label %26
    i32 3, label %27
  ]

26:                                               ; preds = %24
  br label %10

27:                                               ; preds = %24
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %28 = load i32, ptr %1, align 4
  ret i32 %28

29:                                               ; preds = %24
  unreachable
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}


; 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"

@.str.18 = external hidden unnamed_addr constant [23 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local ptr @createStack(i32 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) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare dso_local void @printMenu() local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @operate(ptr noundef, i32 noundef, i8 noundef signext, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i8, align 1
  %3 = alloca i32, align 4
  %4 = tail call ptr @createStack(i32 noundef 10)
  %5 = tail call ptr @createStack(i32 noundef 10)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.18, i32 noundef 0)
  tail call void @printMenu()
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @getUserInput(ptr noundef nonnull %2, ptr noundef nonnull %3)
  %7 = load i8, ptr %2, align 1, !tbaa !9
  %.not5 = icmp eq i8 %7, 101
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %8 = phi i8 [ %12, %.lr.ph ], [ %7, %0 ]
  %9 = load i32, ptr %3, align 4, !tbaa !5
  call void @operate(ptr noundef nonnull %1, i32 noundef %9, i8 noundef signext %8, ptr noundef %4, ptr noundef %5)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #3
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.18, i32 noundef %10)
  call void @printMenu()
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @getUserInput(ptr noundef nonnull %2, ptr noundef nonnull %3)
  %12 = load i8, ptr %2, align 1, !tbaa !9
  %.not = icmp eq i8 %12, 101
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0
}

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!7, !7, i64 0}


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