; LLVM IR from tangjz/acm-icpc :: codeforces/gym/100540F.ll (Z9seg_queryiiii)

; 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"

@seg = external dso_local global [1220122 x i64], 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) #1

; 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 i64 @_Z9seg_queryiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #2 {
  %5 = alloca i64, align 8
  %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
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  %12 = load i32, ptr %8, align 4, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = icmp sle i32 %12, %13
  br i1 %14, label %15, label %26

15:                                               ; preds = %4
  %16 = load i32, ptr %7, align 4, !tbaa !5
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = icmp sle i32 %16, %17
  br i1 %18, label %19, label %26

19:                                               ; preds = %15
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !5
  %22 = call noundef i32 @_Z7seg_idxii(i32 noundef %20, i32 noundef %21)
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1220122 x i64], ptr @seg, i64 0, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  store i64 %25, ptr %5, align 8
  br label %65

26:                                               ; preds = %15, %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = add nsw i32 %27, %28
  %30 = ashr i32 %29, 1
  store i32 %30, ptr %10, align 4, !tbaa !5
  %31 = load i32, ptr %9, align 4, !tbaa !5
  %32 = load i32, ptr %10, align 4, !tbaa !5
  %33 = icmp sle i32 %31, %32
  br i1 %33, label %34, label %40

34:                                               ; preds = %26
  %35 = load i32, ptr %6, align 4, !tbaa !5
  %36 = load i32, ptr %10, align 4, !tbaa !5
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = load i32, ptr %9, align 4, !tbaa !5
  %39 = call noundef i64 @_Z9seg_queryiiii(i32 noundef %35, i32 noundef %36, i32 noundef %37, i32 noundef %38)
  store i64 %39, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %64

40:                                               ; preds = %26
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %10, align 4, !tbaa !5
  %43 = icmp sgt i32 %41, %42
  br i1 %43, label %44, label %51

44:                                               ; preds = %40
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = add nsw i32 %45, 1
  %47 = load i32, ptr %7, align 4, !tbaa !5
  %48 = load i32, ptr %8, align 4, !tbaa !5
  %49 = load i32, ptr %9, align 4, !tbaa !5
  %50 = call noundef i64 @_Z9seg_queryiiii(i32 noundef %46, i32 noundef %47, i32 noundef %48, i32 noundef %49)
  store i64 %50, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %64

51:                                               ; preds = %40
  %52 = load i32, ptr %6, align 4, !tbaa !5
  %53 = load i32, ptr %10, align 4, !tbaa !5
  %54 = load i32, ptr %8, align 4, !tbaa !5
  %55 = load i32, ptr %9, align 4, !tbaa !5
  %56 = call noundef i64 @_Z9seg_queryiiii(i32 noundef %52, i32 noundef %53, i32 noundef %54, i32 noundef %55)
  %57 = load i32, ptr %10, align 4, !tbaa !5
  %58 = add nsw i32 %57, 1
  %59 = load i32, ptr %7, align 4, !tbaa !5
  %60 = load i32, ptr %8, align 4, !tbaa !5
  %61 = load i32, ptr %9, align 4, !tbaa !5
  %62 = call noundef i64 @_Z9seg_queryiiii(i32 noundef %58, i32 noundef %59, i32 noundef %60, i32 noundef %61)
  %63 = or i64 %56, %62
  store i64 %63, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %64

64:                                               ; preds = %51, %44, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %65

65:                                               ; preds = %64, %19
  %66 = load i64, ptr %5, align 8
  ret i64 %66
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 #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, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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"

@seg = external dso_local local_unnamed_addr global [1220122 x i64], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z9seg_queryiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #1 {
  br label %tailrecurse.outer

tailrecurse.outer:                                ; preds = %18, %4
  %accumulator.tr.ph = phi i64 [ %21, %18 ], [ 0, %4 ]
  %.tr.ph = phi i32 [ %20, %18 ], [ %0, %4 ]
  %.tr39.ph = phi i32 [ %.us-phi47, %18 ], [ %1, %4 ]
  br label %tailrecurse.outer42

tailrecurse.outer42:                              ; preds = %tailrecurse.outer, %16
  %.tr.ph43 = phi i32 [ %.tr.ph, %tailrecurse.outer ], [ %17, %16 ]
  %.tr39.ph44 = phi i32 [ %.tr39.ph, %tailrecurse.outer ], [ %.us-phi47, %16 ]
  %.not = icmp slt i32 %.tr.ph43, %2
  br i1 %.not, label %tailrecurse.us, label %tailrecurse

tailrecurse.us:                                   ; preds = %tailrecurse.outer42, %tailrecurse.us
  %.tr39.us = phi i32 [ %6, %tailrecurse.us ], [ %.tr39.ph44, %tailrecurse.outer42 ]
  %5 = add i32 %.tr39.us, %.tr.ph43
  %6 = ashr i32 %5, 1
  %.not38.us = icmp slt i32 %6, %3
  br i1 %.not38.us, label %.split.us, label %tailrecurse.us

tailrecurse:                                      ; preds = %tailrecurse.outer42, %12
  %.tr39 = phi i32 [ %14, %12 ], [ %.tr39.ph44, %tailrecurse.outer42 ]
  %.not37 = icmp sgt i32 %.tr39, %3
  br i1 %.not37, label %12, label %7

7:                                                ; preds = %tailrecurse
  %8 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.tr.ph43, i32 noundef %.tr39)
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [1220122 x i64], ptr @seg, i64 0, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %accumulator.ret.tr = or i64 %11, %accumulator.tr.ph
  ret i64 %accumulator.ret.tr

12:                                               ; preds = %tailrecurse
  %13 = add i32 %.tr39, %.tr.ph43
  %14 = ashr i32 %13, 1
  %.not38 = icmp slt i32 %14, %3
  br i1 %.not38, label %.split.us, label %tailrecurse

.split.us:                                        ; preds = %12, %tailrecurse.us
  %.us-phi = phi i32 [ %6, %tailrecurse.us ], [ %14, %12 ]
  %.us-phi47 = phi i32 [ %.tr39.us, %tailrecurse.us ], [ %.tr39, %12 ]
  %15 = icmp slt i32 %.us-phi, %2
  br i1 %15, label %16, label %18

16:                                               ; preds = %.split.us
  %17 = add nsw i32 %.us-phi, 1
  br label %tailrecurse.outer42

18:                                               ; preds = %.split.us
  %19 = tail call noundef i64 @_Z9seg_queryiiii(i32 noundef %.tr.ph43, i32 noundef %.us-phi, i32 noundef %2, i32 noundef %3)
  %20 = add nsw i32 %.us-phi, 1
  %21 = or i64 %19, %accumulator.tr.ph
  br label %tailrecurse.outer
}

attributes #0 = { inlinehint 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 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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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