; LLVM IR from amritansh22/Data-Structures-and-Algorithms-in-cpp :: LinkedListMiddle (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"

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z11printMiddleP4Node(ptr 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4pushPP4Nodei(ptr noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printListP4Node(ptr noundef) #0

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

4:                                                ; preds = %12, %0
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %15

8:                                                ; preds = %4
  %9 = load i32, ptr %3, align 4, !tbaa !9
  call void @_Z4pushPP4Nodei(ptr noundef %2, i32 noundef %9)
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %10)
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %11)
  br label %12

12:                                               ; preds = %8
  %13 = load i32, ptr %3, align 4, !tbaa !9
  %14 = add nsw i32 %13, -1
  store i32 %14, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !11

15:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  ret i32 0
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress norecurse 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z11printMiddleP4Node(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) #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: mustprogress uwtable
declare dso_local void @_Z4pushPP4Nodei(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printListP4Node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  store ptr null, ptr %1, align 8, !tbaa !5
  call void @_Z4pushPP4Nodei(ptr noundef nonnull %1, i32 noundef 5)
  %2 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %2)
  %3 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %3)
  call void @_Z4pushPP4Nodei(ptr noundef nonnull %1, i32 noundef 4)
  %4 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %4)
  %5 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %5)
  call void @_Z4pushPP4Nodei(ptr noundef nonnull %1, i32 noundef 3)
  %6 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %6)
  %7 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %7)
  call void @_Z4pushPP4Nodei(ptr noundef nonnull %1, i32 noundef 2)
  %8 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %8)
  %9 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %9)
  call void @_Z4pushPP4Nodei(ptr noundef nonnull %1, i32 noundef 1)
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z9printListP4Node(ptr noundef %10)
  %11 = load ptr, ptr %1, align 8, !tbaa !5
  call void @_Z11printMiddleP4Node(ptr noundef %11)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0
}

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress norecurse 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass