; LLVM IR from HarshCasper/NeoAlgo :: C/ds (Circular_LL)

; 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.11 = external hidden unnamed_addr constant [14 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

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

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

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

9:                                                ; preds = %1
  %10 = call i32 (ptr, ...) @printf(ptr noundef @.str.11)
  br label %55

11:                                               ; preds = %1
  br label %12

12:                                               ; preds = %48, %11
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 1
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  store ptr %15, ptr %4, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %40, %12
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = icmp ne ptr %17, %18
  br i1 %19, label %20, label %44

20:                                               ; preds = %16
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.node, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !12
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 0
  %26 = load i32, ptr %25, align 8, !tbaa !12
  %27 = icmp sgt i32 %23, %26
  br i1 %27, label %28, label %40

28:                                               ; preds = %20
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.node, ptr %29, i32 0, i32 0
  %31 = load i32, ptr %30, align 8, !tbaa !12
  store i32 %31, ptr %5, align 4, !tbaa !13
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.node, ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 8, !tbaa !12
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.node, ptr %35, i32 0, i32 0
  store i32 %34, ptr %36, align 8, !tbaa !12
  %37 = load i32, ptr %5, align 4, !tbaa !13
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.node, ptr %38, i32 0, i32 0
  store i32 %37, ptr %39, align 8, !tbaa !12
  br label %40

40:                                               ; preds = %28, %20
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.node, ptr %41, i32 0, i32 1
  %43 = load ptr, ptr %42, align 8, !tbaa !9
  store ptr %43, ptr %4, align 8, !tbaa !5
  br label %16, !llvm.loop !14

44:                                               ; preds = %16
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.node, ptr %45, i32 0, i32 1
  %47 = load ptr, ptr %46, align 8, !tbaa !9
  store ptr %47, ptr %3, align 8, !tbaa !5
  br label %48

48:                                               ; preds = %44
  %49 = load ptr, ptr %3, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.node, ptr %49, i32 0, i32 1
  %51 = load ptr, ptr %50, align 8, !tbaa !9
  %52 = load ptr, ptr %2, align 8, !tbaa !5
  %53 = icmp ne ptr %51, %52
  br i1 %53, label %12, label %54, !llvm.loop !16

54:                                               ; preds = %48
  br label %55

55:                                               ; preds = %54, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret void
}

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 }

!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, !6, i64 8}
!10 = !{!"node", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 0}
!13 = !{!11, !11, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; 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.11 = external hidden unnamed_addr constant [14 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local void @sortList(ptr noundef %0) local_unnamed_addr #1 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %3, label %.preheader.preheader

.preheader.preheader:                             ; preds = %1
  %.phi.trans.insert = getelementptr inbounds i8, ptr %0, i64 8
  %.01520.pre = load ptr, ptr %.phi.trans.insert, align 8, !tbaa !5
  br label %.preheader

3:                                                ; preds = %1
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.11)
  br label %.loopexit

.preheader:                                       ; preds = %.preheader.preheader, %._crit_edge
  %5 = phi ptr [ %13, %._crit_edge ], [ %.01520.pre, %.preheader.preheader ]
  %.0 = phi ptr [ %5, %._crit_edge ], [ %0, %.preheader.preheader ]
  %.not21 = icmp eq ptr %5, %0
  br i1 %.not21, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %10
  %.01522 = phi ptr [ %.015, %10 ], [ %5, %.preheader ]
  %6 = load i32, ptr %.0, align 8, !tbaa !11
  %7 = load i32, ptr %.01522, align 8, !tbaa !11
  %8 = icmp sgt i32 %6, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %.lr.ph
  store i32 %7, ptr %.0, align 8, !tbaa !11
  store i32 %6, ptr %.01522, align 8, !tbaa !11
  br label %10

10:                                               ; preds = %9, %.lr.ph
  %11 = getelementptr inbounds i8, ptr %.01522, i64 8
  %.015 = load ptr, ptr %11, align 8, !tbaa !5
  %.not = icmp eq ptr %.015, %0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %10, %.preheader
  %12 = getelementptr inbounds i8, ptr %5, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %.not19 = icmp eq ptr %13, %0
  br i1 %.not19, label %.loopexit, label %.preheader, !llvm.loop !14

.loopexit:                                        ; preds = %._crit_edge, %3
  ret void
}

attributes #0 = { 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 #1 = { 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" }

!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 = !{!"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 = !{!6, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}


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