; LLVM IR from viveakrt/Competitive-programing :: SPOJ/dquery.ll (Z4readiiiii)

; 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 }

@tree = external dso_local global [1000001 x %struct.node], align 16

; 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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %7, align 4, !tbaa !5
  store i32 %1, ptr %8, align 4, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !5
  store i32 %3, ptr %10, align 4, !tbaa !5
  store i32 %4, ptr %11, align 4, !tbaa !5
  %13 = load i32, ptr %10, align 4, !tbaa !5
  %14 = load i32, ptr %8, align 4, !tbaa !5
  %15 = icmp sgt i32 %13, %14
  br i1 %15, label %20, label %16

16:                                               ; preds = %5
  %17 = load i32, ptr %11, align 4, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %16, %5
  store i32 0, ptr %6, align 4
  br label %62

21:                                               ; preds = %16
  %22 = load i32, ptr %10, align 4, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = icmp sle i32 %22, %23
  br i1 %24, label %25, label %35

25:                                               ; preds = %21
  %26 = load i32, ptr %11, align 4, !tbaa !5
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = icmp sge i32 %26, %27
  br i1 %28, label %29, label %35

29:                                               ; preds = %25
  %30 = load i32, ptr %9, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %31
  %33 = getelementptr inbounds %struct.node, ptr %32, i32 0, i32 2
  %34 = load i32, ptr %33, align 4, !tbaa !9
  store i32 %34, ptr %6, align 4
  br label %62

35:                                               ; preds = %25, %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = add nsw i32 %36, %37
  %39 = sdiv i32 %38, 2
  store i32 %39, ptr %12, align 4, !tbaa !5
  %40 = load i32, ptr %7, align 4, !tbaa !5
  %41 = load i32, ptr %12, align 4, !tbaa !5
  %42 = load i32, ptr %9, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %43
  %45 = getelementptr inbounds %struct.node, ptr %44, i32 0, i32 0
  %46 = load i32, ptr %45, align 4, !tbaa !11
  %47 = load i32, ptr %10, align 4, !tbaa !5
  %48 = load i32, ptr %11, align 4, !tbaa !5
  %49 = call noundef i32 @_Z4readiiiii(i32 noundef %40, i32 noundef %41, i32 noundef %46, i32 noundef %47, i32 noundef %48)
  %50 = load i32, ptr %12, align 4, !tbaa !5
  %51 = add nsw i32 %50, 1
  %52 = load i32, ptr %8, align 4, !tbaa !5
  %53 = load i32, ptr %9, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %54
  %56 = getelementptr inbounds %struct.node, ptr %55, i32 0, i32 1
  %57 = load i32, ptr %56, align 4, !tbaa !12
  %58 = load i32, ptr %10, align 4, !tbaa !5
  %59 = load i32, ptr %11, align 4, !tbaa !5
  %60 = call noundef i32 @_Z4readiiiii(i32 noundef %51, i32 noundef %52, i32 noundef %57, i32 noundef %58, i32 noundef %59)
  %61 = add nsw i32 %49, %60
  store i32 %61, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  br label %62

62:                                               ; preds = %35, %29, %20
  %63 = load i32, ptr %6, align 4
  ret i32 %63
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
attributes #2 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4node", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 0}
!12 = !{!10, !6, i64 4}


; 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"

%struct.node = type { i32, i32, i32 }

@tree = external dso_local local_unnamed_addr global [1000001 x %struct.node], align 16

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = icmp sgt i32 %3, %1
  %7 = icmp slt i32 %4, %0
  %or.cond35 = or i1 %6, %7
  br i1 %or.cond35, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %5
  %.not26 = icmp slt i32 %4, %1
  br i1 %.not26, label %tailrecurse.us, label %.lr.ph.split.split

tailrecurse.us:                                   ; preds = %.lr.ph, %tailrecurse.us
  %.tr2938.us = phi i32 [ %16, %tailrecurse.us ], [ %2, %.lr.ph ]
  %.tr37.us = phi i32 [ %14, %tailrecurse.us ], [ %0, %.lr.ph ]
  %accumulator.tr36.us = phi i32 [ %17, %tailrecurse.us ], [ 0, %.lr.ph ]
  %8 = add nsw i32 %.tr37.us, %1
  %9 = sdiv i32 %8, 2
  %10 = sext i32 %.tr2938.us to i64
  %11 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = tail call noundef i32 @_Z4readiiiii(i32 noundef %.tr37.us, i32 noundef %9, i32 noundef %12, i32 noundef %3, i32 noundef %4)
  %14 = add nsw i32 %9, 1
  %15 = getelementptr inbounds i8, ptr %11, i64 4
  %16 = load i32, ptr %15, align 4, !tbaa !10
  %17 = add nsw i32 %13, %accumulator.tr36.us
  %.not50 = icmp slt i32 %9, %4
  br i1 %.not50, label %tailrecurse.us, label %.loopexit

.lr.ph.split.split:                               ; preds = %.lr.ph, %tailrecurse
  %.tr2938 = phi i32 [ %29, %tailrecurse ], [ %2, %.lr.ph ]
  %.tr37 = phi i32 [ %27, %tailrecurse ], [ %0, %.lr.ph ]
  %accumulator.tr36 = phi i32 [ %30, %tailrecurse ], [ 0, %.lr.ph ]
  %.not = icmp slt i32 %.tr37, %3
  br i1 %.not, label %tailrecurse, label %.split.us

.split.us:                                        ; preds = %.lr.ph.split.split
  %18 = sext i32 %.tr2938 to i64
  %19 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %18, i32 2
  %20 = load i32, ptr %19, align 4, !tbaa !11
  br label %.loopexit

tailrecurse:                                      ; preds = %.lr.ph.split.split
  %21 = add nsw i32 %.tr37, %1
  %22 = sdiv i32 %21, 2
  %23 = sext i32 %.tr2938 to i64
  %24 = getelementptr inbounds [1000001 x %struct.node], ptr @tree, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = tail call noundef i32 @_Z4readiiiii(i32 noundef %.tr37, i32 noundef %22, i32 noundef %25, i32 noundef %3, i32 noundef %4)
  %27 = add nsw i32 %22, 1
  %28 = getelementptr inbounds i8, ptr %24, i64 4
  %29 = load i32, ptr %28, align 4, !tbaa !10
  %30 = add nsw i32 %26, %accumulator.tr36
  %.not49 = icmp slt i32 %22, %4
  br i1 %.not49, label %.lr.ph.split.split, label %.loopexit

.loopexit:                                        ; preds = %tailrecurse, %tailrecurse.us, %5, %.split.us
  %accumulator.tr34 = phi i32 [ %accumulator.tr36, %.split.us ], [ 0, %5 ], [ %17, %tailrecurse.us ], [ %30, %tailrecurse ]
  %.0 = phi i32 [ %20, %.split.us ], [ 0, %5 ], [ 0, %tailrecurse.us ], [ 0, %tailrecurse ]
  %accumulator.ret.tr = add nsw i32 %.0, %accumulator.tr34
  ret i32 %accumulator.ret.tr
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(read, argmem: none, 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, !7, i64 0}
!6 = !{!"_ZTS4node", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!6, !7, i64 8}


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