; LLVM IR from tangjz/acm-icpc :: 51nod/1672.ll (Z5queryiii)

; 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 [200020 x i32], 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 i32 @_Z5queryiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %38, %3
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %39

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = add nsw i32 %13, %14
  %16 = ashr i32 %15, 1
  store i32 %16, ptr %7, align 4, !tbaa !5
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = call noundef i32 @_Z7seg_idxii(i32 noundef %17, i32 noundef %18)
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [200020 x i32], ptr @seg, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = icmp slt i32 %22, %23
  br i1 %24, label %25, label %36

25:                                               ; preds = %12
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !5
  %28 = call noundef i32 @_Z7seg_idxii(i32 noundef %26, i32 noundef %27)
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [200020 x i32], ptr @seg, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = sub nsw i32 %32, %31
  store i32 %33, ptr %6, align 4, !tbaa !5
  %34 = load i32, ptr %7, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %4, align 4, !tbaa !5
  br label %38

36:                                               ; preds = %12
  %37 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %37, ptr %5, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %36, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %8, !llvm.loop !9

39:                                               ; preds = %8
  %40 = load i32, ptr %4, align 4, !tbaa !5
  ret i32 %40
}

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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; 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 [200020 x i32], 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 i32 @_Z5queryiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = icmp slt i32 %0, %1
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %19
  %.019 = phi i32 [ %.1, %19 ], [ %0, %3 ]
  %.01318 = phi i32 [ %.114, %19 ], [ %2, %3 ]
  %.01517 = phi i32 [ %.116, %19 ], [ %1, %3 ]
  %5 = add nsw i32 %.019, %.01517
  %6 = ashr i32 %5, 1
  %7 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.019, i32 noundef %6)
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [200020 x i32], ptr @seg, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp slt i32 %10, %.01318
  br i1 %11, label %12, label %19

12:                                               ; preds = %.lr.ph
  %13 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.019, i32 noundef %6)
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [200020 x i32], ptr @seg, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = sub nsw i32 %.01318, %16
  %18 = add nsw i32 %6, 1
  br label %19

19:                                               ; preds = %.lr.ph, %12
  %.116 = phi i32 [ %.01517, %12 ], [ %6, %.lr.ph ]
  %.114 = phi i32 [ %17, %12 ], [ %.01318, %.lr.ph ]
  %.1 = phi i32 [ %18, %12 ], [ %.019, %.lr.ph ]
  %20 = icmp slt i32 %.1, %.116
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %19, %3
  %.0.lcssa = phi i32 [ %0, %3 ], [ %.1, %19 ]
  ret i32 %.0.lcssa
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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