; LLVM IR from mahendramahara/DSA-in-C-Programing :: LINKED-LIST (InsertAtAnyPositionLinkedList)

; 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.node = type { i32, ptr }

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@head = external dso_local global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [17 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

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

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

; Function Attrs: nounwind uwtable
define dso_local void @randominsert(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %8 = call noalias ptr @malloc(i64 noundef 16) #5
  store ptr %8, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %9 = load ptr, ptr %3, align 8, !tbaa !9
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %13

11:                                               ; preds = %1
  %12 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %47

13:                                               ; preds = %1
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %6)
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = load ptr, ptr %3, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.node, ptr %17, i32 0, i32 0
  store i32 %16, ptr %18, align 8, !tbaa !11
  %19 = load ptr, ptr @head, align 8, !tbaa !9
  store ptr %19, ptr %4, align 8, !tbaa !9
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %34, %13
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = sub nsw i32 %22, 1
  %24 = icmp slt i32 %21, %23
  br i1 %24, label %25, label %37

25:                                               ; preds = %20
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  %27 = icmp eq ptr %26, null
  br i1 %27, label %28, label %30

28:                                               ; preds = %25
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  store i32 1, ptr %7, align 4
  br label %48

30:                                               ; preds = %25
  %31 = load ptr, ptr %4, align 8, !tbaa !9
  %32 = getelementptr inbounds %struct.node, ptr %31, i32 0, i32 1
  %33 = load ptr, ptr %32, align 8, !tbaa !13
  store ptr %33, ptr %4, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %30
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %5, align 4, !tbaa !5
  br label %20, !llvm.loop !14

37:                                               ; preds = %20
  %38 = load ptr, ptr %4, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.node, ptr %38, i32 0, i32 1
  %40 = load ptr, ptr %39, align 8, !tbaa !13
  %41 = load ptr, ptr %3, align 8, !tbaa !9
  %42 = getelementptr inbounds %struct.node, ptr %41, i32 0, i32 1
  store ptr %40, ptr %42, align 8, !tbaa !13
  %43 = load ptr, ptr %3, align 8, !tbaa !9
  %44 = load ptr, ptr %4, align 8, !tbaa !9
  %45 = getelementptr inbounds %struct.node, ptr %44, i32 0, i32 1
  store ptr %43, ptr %45, align 8, !tbaa !13
  %46 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  br label %47

47:                                               ; preds = %37, %11
  store i32 0, ptr %7, align 4
  br label %48

48:                                               ; preds = %47, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  %49 = load i32, ptr %7, align 4
  switch i32 %49, label %51 [
    i32 0, label %50
    i32 1, label %50
  ]

50:                                               ; preds = %48, %48
  ret void

51:                                               ; preds = %48
  unreachable
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = { 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 #4 = { nounwind }
attributes #5 = { 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 = !{!12, !6, i64 0}
!12 = !{!"node", !6, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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"

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@head = external dso_local local_unnamed_addr global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [17 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: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

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

; Function Attrs: nofree nounwind uwtable
define dso_local void @randominsert(i32 noundef %0) local_unnamed_addr #2 {
  %2 = alloca i32, align 4
  %3 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %7

5:                                                ; preds = %1
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  br label %23

7:                                                ; preds = %1
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  store i32 %0, ptr %3, align 8, !tbaa !5
  %10 = load i32, ptr %2, align 4, !tbaa !11
  %.01013 = load ptr, ptr @head, align 8, !tbaa !12
  %11 = icmp sgt i32 %10, 1
  br i1 %11, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %7
  %12 = add nsw i32 %10, -2
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %16
  %.01015 = phi ptr [ %.010, %16 ], [ %.01013, %.lr.ph.preheader ]
  %.014 = phi i32 [ %18, %16 ], [ 0, %.lr.ph.preheader ]
  %13 = icmp eq ptr %.01015, null
  br i1 %13, label %14, label %16

14:                                               ; preds = %.lr.ph
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  br label %23

16:                                               ; preds = %.lr.ph
  %17 = getelementptr inbounds i8, ptr %.01015, i64 8
  %18 = add nuw nsw i32 %.014, 1
  %.010 = load ptr, ptr %17, align 8, !tbaa !12
  %exitcond.not = icmp eq i32 %.014, %12
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %16, %7
  %.010.lcssa = phi ptr [ %.01013, %7 ], [ %.010, %16 ]
  %19 = getelementptr inbounds i8, ptr %.010.lcssa, i64 8
  %20 = load ptr, ptr %19, align 8, !tbaa !15
  %21 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %20, ptr %21, align 8, !tbaa !15
  store ptr %3, ptr %19, align 8, !tbaa !15
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  br label %23

23:                                               ; preds = %5, %._crit_edge, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  ret void
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.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 #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { nofree 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 = { 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 #4 = { nounwind allocsize(0) }
attributes #5 = { 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, !7, i64 0}
!6 = !{!"node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!10, !10, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!6, !10, i64 8}


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