; LLVM IR from viveakrt/Competitive-programing :: SPOJ/orderset.ll (Z4findRP4nodei)

; 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 uwtable
define dso_local noundef zeroext i1 @_Z4findRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) #0 {
  %3 = alloca i1, align 1
  %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 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %2
  store i1 false, ptr %3, align 1
  br label %37

10:                                               ; preds = %2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load ptr, ptr %11, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 1
  %14 = load i32, ptr %13, align 4, !tbaa !11
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %18

17:                                               ; preds = %10
  store i1 true, ptr %3, align 1
  br label %37

18:                                               ; preds = %10
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.node, ptr %21, i32 0, i32 1
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = icmp slt i32 %19, %23
  br i1 %24, label %25, label %31

25:                                               ; preds = %18
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load ptr, ptr %26, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.node, ptr %27, i32 0, i32 3
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = call noundef zeroext i1 @_Z4findRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %28, i32 noundef %29)
  store i1 %30, ptr %3, align 1
  br label %37

31:                                               ; preds = %18
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = load ptr, ptr %32, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.node, ptr %33, i32 0, i32 4
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = call noundef zeroext i1 @_Z4findRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %34, i32 noundef %35)
  store i1 %36, ptr %3, align 1
  br label %37

37:                                               ; preds = %31, %25, %17, %9
  %38 = load i1, ptr %3, align 1
  ret i1 %38
}

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" }

!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}


; 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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @_Z4findRP4nodei(ptr nocapture noundef nonnull readonly align 8 dereferenceable(8) %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not13 = icmp eq ptr %3, null
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse.backedge
  %4 = phi ptr [ %9, %tailrecurse.backedge ], [ %3, %2 ]
  %5 = getelementptr inbounds i8, ptr %4, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %7 = icmp eq i32 %6, %1
  br i1 %7, label %._crit_edge, label %tailrecurse.backedge

tailrecurse.backedge:                             ; preds = %.lr.ph
  %8 = icmp sgt i32 %6, %1
  %.tr.be.v = select i1 %8, i64 16, i64 24
  %.tr.be = getelementptr inbounds i8, ptr %4, i64 %.tr.be.v
  %9 = load ptr, ptr %.tr.be, align 8, !tbaa !5
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %tailrecurse.backedge, %.lr.ph, %2
  %.0 = phi i1 [ false, %2 ], [ %7, %.lr.ph ], [ %7, %tailrecurse.backedge ]
  ret i1 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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, !11, i64 4}
!10 = !{!"_ZTS4node", !11, i64 0, !11, i64 4, !11, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}


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