; LLVM IR from viveakrt/Competitive-programing :: SPOJ/ttm.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 { i64, i64, i32, i32 }

@tree = external dso_local global [20000200 x %struct.node], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6pushlziii(i32 noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #2 {
  %6 = alloca i64, align 8
  %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 %7, align 4, !tbaa !5
  %14 = load i32, ptr %8, align 4, !tbaa !5
  %15 = load i32, ptr %9, align 4, !tbaa !5
  call void @_Z6pushlziii(i32 noundef %13, i32 noundef %14, i32 noundef %15)
  %16 = load i32, ptr %10, align 4, !tbaa !5
  %17 = load i32, ptr %8, align 4, !tbaa !5
  %18 = icmp sgt i32 %16, %17
  br i1 %18, label %23, label %19

19:                                               ; preds = %5
  %20 = load i32, ptr %11, align 4, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !5
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %23, label %24

23:                                               ; preds = %19, %5
  store i64 0, ptr %6, align 8
  br label %65

24:                                               ; preds = %19
  %25 = load i32, ptr %10, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %28, label %38

28:                                               ; preds = %24
  %29 = load i32, ptr %11, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = icmp sge i32 %29, %30
  br i1 %31, label %32, label %38

32:                                               ; preds = %28
  %33 = load i32, ptr %9, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %34
  %36 = getelementptr inbounds %struct.node, ptr %35, i32 0, i32 0
  %37 = load i64, ptr %36, align 8, !tbaa !9
  store i64 %37, ptr %6, align 8
  br label %65

38:                                               ; preds = %28, %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = load i32, ptr %8, align 4, !tbaa !5
  %41 = add nsw i32 %39, %40
  %42 = sdiv i32 %41, 2
  store i32 %42, ptr %12, align 4, !tbaa !5
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = load i32, ptr %12, align 4, !tbaa !5
  %45 = load i32, ptr %9, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %46
  %48 = getelementptr inbounds %struct.node, ptr %47, i32 0, i32 2
  %49 = load i32, ptr %48, align 8, !tbaa !12
  %50 = load i32, ptr %10, align 4, !tbaa !5
  %51 = load i32, ptr %11, align 4, !tbaa !5
  %52 = call noundef i64 @_Z4readiiiii(i32 noundef %43, i32 noundef %44, i32 noundef %49, i32 noundef %50, i32 noundef %51)
  %53 = load i32, ptr %12, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  %55 = load i32, ptr %8, align 4, !tbaa !5
  %56 = load i32, ptr %9, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %57
  %59 = getelementptr inbounds %struct.node, ptr %58, i32 0, i32 3
  %60 = load i32, ptr %59, align 4, !tbaa !13
  %61 = load i32, ptr %10, align 4, !tbaa !5
  %62 = load i32, ptr %11, align 4, !tbaa !5
  %63 = call noundef i64 @_Z4readiiiii(i32 noundef %54, i32 noundef %55, i32 noundef %60, i32 noundef %61, i32 noundef %62)
  %64 = add nsw i64 %52, %63
  store i64 %64, ptr %6, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %65

65:                                               ; preds = %38, %32, %23
  %66 = load i64, ptr %6, align 8
  ret i64 %66
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS4node", !11, i64 0, !11, i64 8, !6, i64 16, !6, i64 20}
!11 = !{!"long long", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !6, i64 20}


; 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 { i64, i64, i32, i32 }

@tree = external dso_local local_unnamed_addr global [20000200 x %struct.node], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6pushlziii(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  tail call void @_Z6pushlziii(i32 noundef %0, i32 noundef %1, i32 noundef %2)
  %6 = icmp sgt i32 %3, %1
  %7 = icmp slt i32 %4, %0
  %or.cond38 = or i1 %6, %7
  br i1 %or.cond38, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %5
  %.not29 = icmp slt i32 %4, %1
  br i1 %.not29, label %tailrecurse.us, label %.lr.ph.split.split

tailrecurse.us:                                   ; preds = %.lr.ph, %tailrecurse.us
  %.tr3241.us = phi i32 [ %17, %tailrecurse.us ], [ %2, %.lr.ph ]
  %.tr40.us = phi i32 [ %15, %tailrecurse.us ], [ %0, %.lr.ph ]
  %accumulator.tr39.us = phi i64 [ %18, %tailrecurse.us ], [ 0, %.lr.ph ]
  %8 = add nsw i32 %.tr40.us, %1
  %9 = sdiv i32 %8, 2
  %10 = sext i32 %.tr3241.us to i64
  %11 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %10
  %12 = getelementptr inbounds i8, ptr %11, i64 16
  %13 = load i32, ptr %12, align 8, !tbaa !5
  %14 = tail call noundef i64 @_Z4readiiiii(i32 noundef %.tr40.us, i32 noundef %9, i32 noundef %13, i32 noundef %3, i32 noundef %4)
  %15 = add nsw i32 %9, 1
  %16 = getelementptr inbounds i8, ptr %11, i64 20
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = add nsw i64 %14, %accumulator.tr39.us
  tail call void @_Z6pushlziii(i32 noundef %15, i32 noundef %1, i32 noundef %17)
  %.not53 = icmp slt i32 %9, %4
  br i1 %.not53, label %tailrecurse.us, label %.loopexit

.lr.ph.split.split:                               ; preds = %.lr.ph, %tailrecurse
  %.tr3241 = phi i32 [ %31, %tailrecurse ], [ %2, %.lr.ph ]
  %.tr40 = phi i32 [ %29, %tailrecurse ], [ %0, %.lr.ph ]
  %accumulator.tr39 = phi i64 [ %32, %tailrecurse ], [ 0, %.lr.ph ]
  %.not = icmp slt i32 %.tr40, %3
  br i1 %.not, label %tailrecurse, label %.split.us

.split.us:                                        ; preds = %.lr.ph.split.split
  %19 = sext i32 %.tr3241 to i64
  %20 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %19
  %21 = load i64, ptr %20, align 8, !tbaa !12
  br label %.loopexit

tailrecurse:                                      ; preds = %.lr.ph.split.split
  %22 = add nsw i32 %.tr40, %1
  %23 = sdiv i32 %22, 2
  %24 = sext i32 %.tr3241 to i64
  %25 = getelementptr inbounds [20000200 x %struct.node], ptr @tree, i64 0, i64 %24
  %26 = getelementptr inbounds i8, ptr %25, i64 16
  %27 = load i32, ptr %26, align 8, !tbaa !5
  %28 = tail call noundef i64 @_Z4readiiiii(i32 noundef %.tr40, i32 noundef %23, i32 noundef %27, i32 noundef %3, i32 noundef %4)
  %29 = add nsw i32 %23, 1
  %30 = getelementptr inbounds i8, ptr %25, i64 20
  %31 = load i32, ptr %30, align 4, !tbaa !11
  %32 = add nsw i64 %28, %accumulator.tr39
  tail call void @_Z6pushlziii(i32 noundef %29, i32 noundef %1, i32 noundef %31)
  %.not52 = icmp slt i32 %23, %4
  br i1 %.not52, label %.lr.ph.split.split, label %.loopexit

.loopexit:                                        ; preds = %tailrecurse, %tailrecurse.us, %5, %.split.us
  %accumulator.tr37 = phi i64 [ %accumulator.tr39, %.split.us ], [ 0, %5 ], [ %18, %tailrecurse.us ], [ %32, %tailrecurse ]
  %.0 = phi i64 [ %21, %.split.us ], [ 0, %5 ], [ 0, %tailrecurse.us ], [ 0, %tailrecurse ]
  %accumulator.ret.tr = add nsw i64 %.0, %accumulator.tr37
  ret i64 %accumulator.ret.tr
}

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 8, !10, i64 16, !10, i64 20}
!7 = !{!"long long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 20}
!12 = !{!6, !7, i64 0}


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