; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Linear/Stack/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"

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

@.str.8 = external hidden unnamed_addr constant [10 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

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

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

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

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

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

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

6:                                                ; preds = %18, %0
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.Stack, ptr %8, i32 0, i32 1
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = icmp slt i32 %7, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %21

13:                                               ; preds = %6
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = add nsw i32 %15, 1
  %17 = mul nsw i32 %16, 10
  call void @push(ptr noundef %14, i32 noundef %17)
  br label %18

18:                                               ; preds = %13
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !13

21:                                               ; preds = %12
  %22 = load ptr, ptr %2, align 8, !tbaa !5
  call void @printStack(ptr noundef %22)
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  call void @push(ptr noundef %23, i32 noundef 90)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = call i32 @peek(ptr noundef %24)
  store i32 %25, ptr %4, align 4, !tbaa !9
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %26)
  br label %28

28:                                               ; preds = %33, %21
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.Stack, ptr %29, i32 0, i32 2
  %31 = load i32, ptr %30, align 4, !tbaa !15
  %32 = icmp ne i32 %31, -1
  br i1 %32, label %33, label %36

33:                                               ; preds = %28
  %34 = load ptr, ptr %2, align 8, !tbaa !5
  %35 = call i32 @pop(ptr noundef %34)
  br label %28, !llvm.loop !16

36:                                               ; preds = %28
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  call void @printStack(ptr noundef %37)
  %38 = load ptr, ptr %2, align 8, !tbaa !5
  %39 = call i32 @pop(ptr noundef %38)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #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 = { 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 = !{!12, !10, i64 8}
!12 = !{!"Stack", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!12, !10, i64 12}
!16 = distinct !{!16, !14}


; 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.8 = external hidden unnamed_addr constant [10 x i8], align 1

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

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

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

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call ptr @createStack(i32 noundef 8)
  %2 = getelementptr inbounds i8, ptr %1, i64 8
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  tail call void @printStack(ptr noundef nonnull %1)
  tail call void @push(ptr noundef nonnull %1, i32 noundef 90)
  %5 = tail call i32 @peek(ptr noundef nonnull %1)
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %5)
  %7 = getelementptr inbounds i8, ptr %1, i64 12
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %.not13 = icmp eq i32 %8, -1
  br i1 %.not13, label %._crit_edge16, label %.lr.ph15

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.012 = phi i32 [ %9, %.lr.ph ], [ 0, %0 ]
  %9 = add nuw nsw i32 %.012, 1
  %10 = mul nuw nsw i32 %9, 10
  tail call void @push(ptr noundef nonnull %1, i32 noundef %10)
  %11 = load i32, ptr %2, align 8, !tbaa !5
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !12

.lr.ph15:                                         ; preds = %._crit_edge, %.lr.ph15
  %13 = tail call i32 @pop(ptr noundef nonnull %1)
  %14 = load i32, ptr %7, align 4, !tbaa !11
  %.not = icmp eq i32 %14, -1
  br i1 %.not, label %._crit_edge16, label %.lr.ph15, !llvm.loop !14

._crit_edge16:                                    ; preds = %.lr.ph15, %._crit_edge
  tail call void @printStack(ptr noundef nonnull %1)
  %15 = tail call i32 @pop(ptr noundef nonnull %1)
  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 = { 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" }

!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, !10, i64 8}
!6 = !{!"Stack", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 12}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}


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