; LLVM IR from viveakrt/Competitive-programing :: SPOJ/count1it.ll (Z5countP4nodei)

; 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 @_Z5countP4nodei(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 = icmp ne ptr %6, null
  br i1 %7, label %9, label %8

8:                                                ; preds = %2
  store i32 0, ptr %3, align 4
  br label %33

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 1
  %13 = load i32, ptr %12, align 4, !tbaa !11
  %14 = icmp sge i32 %10, %13
  br i1 %14, label %15, label %27

15:                                               ; preds = %9
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.node, ptr %16, i32 0, i32 3
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = call noundef i32 @_Z2szP4node(ptr noundef %18)
  %20 = add nsw i32 %19, 1
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.node, ptr %21, i32 0, i32 4
  %23 = load ptr, ptr %22, align 8, !tbaa !14
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = call noundef i32 @_Z5countP4nodei(ptr noundef %23, i32 noundef %24)
  %26 = add nsw i32 %20, %25
  store i32 %26, ptr %3, align 4
  br label %33

27:                                               ; preds = %9
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 3
  %30 = load ptr, ptr %29, align 8, !tbaa !13
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = call noundef i32 @_Z5countP4nodei(ptr noundef %30, i32 noundef %31)
  store i32 %32, ptr %3, align 4
  br label %33

33:                                               ; preds = %27, %15, %8
  %34 = load i32, ptr %3, align 4
  ret i32 %34
}

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, !10, i64 4}
!12 = !{!"_ZTS4node", !10, i64 0, !10, i64 4, !10, i64 8, !6, i64 16, !6, i64 24}
!13 = !{!12, !6, i64 16}
!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 @_Z5countP4nodei(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not1316 = icmp eq ptr %0, null
  br i1 %.not1316, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse.outer
  %.tr.ph18 = phi ptr [ %10, %tailrecurse.outer ], [ %0, %2 ]
  %accumulator.tr.ph17 = phi i32 [ %12, %tailrecurse.outer ], [ 0, %2 ]
  br label %3

3:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr14 = phi ptr [ %.tr.ph18, %.lr.ph ], [ %7, %tailrecurse ]
  %4 = getelementptr inbounds i8, ptr %.tr14, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not10 = icmp sgt i32 %5, %1
  %6 = getelementptr inbounds i8, ptr %.tr14, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  br i1 %.not10, label %tailrecurse, label %tailrecurse.outer

tailrecurse.outer:                                ; preds = %3
  %8 = tail call noundef i32 @_Z2szP4node(ptr noundef %7)
  %9 = getelementptr inbounds i8, ptr %.tr14, i64 24
  %10 = load ptr, ptr %9, align 8, !tbaa !12
  %11 = add i32 %accumulator.tr.ph17, 1
  %12 = add i32 %11, %8
  %.not13 = icmp eq ptr %10, null
  br i1 %.not13, label %tailrecurse.outer._crit_edge, label %.lr.ph

tailrecurse:                                      ; preds = %3
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %tailrecurse.outer._crit_edge, label %3

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %tailrecurse, %2
  %accumulator.tr.ph.lcssa = phi i32 [ 0, %2 ], [ %accumulator.tr.ph17, %tailrecurse ], [ %12, %tailrecurse.outer ]
  ret i32 %accumulator.tr.ph.lcssa
}

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, !7, i64 4}
!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, !10, i64 16}
!12 = !{!6, !10, i64 24}


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