; LLVM IR from viveakrt/Competitive-programing :: SPOJ/koiline.ll (Z4findP4nodei)

; 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, i32, i32, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z2szP4node(ptr noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z4findP4nodei(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 3
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = call noundef i32 @_Z2szP4node(ptr noundef %8)
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp eq i32 %9, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 1
  %15 = load i32, ptr %14, align 4, !tbaa !13
  store i32 %15, ptr %3, align 4
  br label %42

16:                                               ; preds = %2
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.node, ptr %18, i32 0, i32 3
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  %21 = call noundef i32 @_Z2szP4node(ptr noundef %20)
  %22 = add nsw i32 %21, 1
  %23 = icmp slt i32 %17, %22
  br i1 %23, label %24, label %30

24:                                               ; preds = %16
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.node, ptr %25, i32 0, i32 3
  %27 = load ptr, ptr %26, align 8, !tbaa !11
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = call noundef i32 @_Z4findP4nodei(ptr noundef %27, i32 noundef %28)
  store i32 %29, ptr %3, align 4
  br label %42

30:                                               ; preds = %16
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.node, ptr %31, i32 0, i32 4
  %33 = load ptr, ptr %32, align 8, !tbaa !14
  %34 = load i32, ptr %5, align 4, !tbaa !9
  %35 = sub nsw i32 %34, 1
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.node, ptr %36, i32 0, i32 3
  %38 = load ptr, ptr %37, align 8, !tbaa !11
  %39 = call noundef i32 @_Z2szP4node(ptr noundef %38)
  %40 = sub nsw i32 %35, %39
  %41 = call noundef i32 @_Z4findP4nodei(ptr noundef %33, i32 noundef %40)
  store i32 %41, ptr %3, align 4
  br label %42

42:                                               ; preds = %30, %24, %12
  %43 = load i32, ptr %3, align 4
  ret i32 %43
}

attributes #0 = { mustprogress 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 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, !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 = !{!12, !6, i64 16}
!12 = !{!"_ZTS4node", !10, i64 0, !10, i64 4, !10, i64 8, !6, i64 16, !6, i64 24}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !6, i64 24}


; 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 nounwind uwtable
declare dso_local noundef i32 @_Z2szP4node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4findP4nodei(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = tail call noundef i32 @_Z2szP4node(ptr noundef %4)
  %6 = icmp eq i32 %5, %1
  br i1 %6, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse.outer
  %7 = phi ptr [ %27, %tailrecurse.outer ], [ %3, %2 ]
  %.tr11.ph17 = phi i32 [ %26, %tailrecurse.outer ], [ %1, %2 ]
  %.tr.ph16 = phi ptr [ %22, %tailrecurse.outer ], [ %0, %2 ]
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = tail call noundef i32 @_Z2szP4node(ptr noundef %8)
  %.not34 = icmp slt i32 %9, %.tr11.ph17
  br i1 %.not34, label %tailrecurse.outer, label %tailrecurse

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %tailrecurse, %2
  %.tr.lcssa = phi ptr [ %0, %2 ], [ %16, %tailrecurse ], [ %22, %tailrecurse.outer ]
  %10 = getelementptr inbounds i8, ptr %.tr.lcssa, i64 4
  %11 = load i32, ptr %10, align 4, !tbaa !11
  ret i32 %11

12:                                               ; preds = %tailrecurse
  %13 = load ptr, ptr %17, align 8, !tbaa !5
  %14 = tail call noundef i32 @_Z2szP4node(ptr noundef %13)
  %.not = icmp slt i32 %14, %.tr11.ph17
  br i1 %.not, label %tailrecurse.outer, label %tailrecurse

tailrecurse:                                      ; preds = %.lr.ph, %12
  %15 = phi ptr [ %17, %12 ], [ %7, %.lr.ph ]
  %16 = load ptr, ptr %15, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = tail call noundef i32 @_Z2szP4node(ptr noundef %18)
  %20 = icmp eq i32 %19, %.tr11.ph17
  br i1 %20, label %tailrecurse.outer._crit_edge, label %12

tailrecurse.outer:                                ; preds = %12, %.lr.ph
  %.lcssa = phi ptr [ %7, %.lr.ph ], [ %17, %12 ]
  %.tr14.lcssa = phi ptr [ %.tr.ph16, %.lr.ph ], [ %16, %12 ]
  %21 = getelementptr inbounds i8, ptr %.tr14.lcssa, i64 24
  %22 = load ptr, ptr %21, align 8, !tbaa !12
  %23 = load ptr, ptr %.lcssa, align 8, !tbaa !5
  %24 = tail call noundef i32 @_Z2szP4node(ptr noundef %23)
  %25 = xor i32 %24, -1
  %26 = add i32 %.tr11.ph17, %25
  %27 = getelementptr inbounds i8, ptr %22, i64 16
  %28 = load ptr, ptr %27, align 8, !tbaa !5
  %29 = tail call noundef i32 @_Z2szP4node(ptr noundef %28)
  %30 = icmp eq i32 %29, %26
  br i1 %30, label %tailrecurse.outer._crit_edge, label %.lr.ph
}

attributes #0 = { mustprogress 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 16}
!6 = !{!"_ZTS4node", !7, i64 0, !7, i64 4, !7, i64 8, !10, i64 16, !10, i64 24}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 24}


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