; LLVM IR from tangjz/acm-icpc :: self_training/2015-09-22/B.ll (Z6wqueryiii)

; 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"

@wseg = external dso_local global [200010 x i32], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(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 i32 @_Z6wqueryiii(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
  %8 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %34, %3
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %13, label %35

13:                                               ; preds = %9
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = call noundef i32 @_Z7seg_idxii(i32 noundef %14, i32 noundef %15)
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [200010 x i32], ptr @wseg, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !5
  %21 = xor i32 %20, %19
  store i32 %21, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = add nsw i32 %22, %23
  %25 = ashr i32 %24, 1
  store i32 %25, ptr %8, align 4, !tbaa !5
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = icmp sle i32 %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %13
  %30 = load i32, ptr %8, align 4, !tbaa !5
  store i32 %30, ptr %5, align 4, !tbaa !5
  br label %34

31:                                               ; preds = %13
  %32 = load i32, ptr %8, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %4, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %31, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %9, !llvm.loop !9

35:                                               ; preds = %9
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = call noundef i32 @_Z7seg_idxii(i32 noundef %37, i32 noundef %38)
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [200010 x i32], ptr @wseg, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = xor i32 %36, %42
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret i32 %43
}

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 = { 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 = 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"

@wseg = external dso_local local_unnamed_addr global [200010 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 @_Z6wqueryiii(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, %.lr.ph
  %.021 = phi i32 [ %.1, %.lr.ph ], [ %0, %3 ]
  %.01420 = phi i32 [ %9, %.lr.ph ], [ 0, %3 ]
  %.01519 = phi i32 [ %.116, %.lr.ph ], [ %1, %3 ]
  %5 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.021, i32 noundef %.01519)
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [200010 x i32], ptr @wseg, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = xor i32 %8, %.01420
  %10 = add nsw i32 %.021, %.01519
  %11 = ashr i32 %10, 1
  %.not = icmp slt i32 %11, %2
  %12 = add nsw i32 %11, 1
  %.116 = select i1 %.not, i32 %.01519, i32 %11
  %.1 = select i1 %.not, i32 %12, i32 %.021
  %13 = icmp slt i32 %.1, %.116
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.015.lcssa = phi i32 [ %1, %3 ], [ %.116, %.lr.ph ]
  %.014.lcssa = phi i32 [ 0, %3 ], [ %9, %.lr.ph ]
  %.0.lcssa = phi i32 [ %0, %3 ], [ %.1, %.lr.ph ]
  %14 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.0.lcssa, i32 noundef %.015.lcssa)
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [200010 x i32], ptr @wseg, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = xor i32 %17, %.014.lcssa
  ret i32 %18
}

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,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass