; LLVM IR from eyangch/competitive-programming :: USACOcontests/gold/2017.02/circlecross.ll (Z3updxxxRA200001_x)

; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3updxxxRA200001_x(i64 noundef %0, i64 noundef %1, i64 noundef %2, ptr noundef nonnull align 8 dereferenceable(1600008) %3) #0 {
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %21, %4
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %7, align 8, !tbaa !5
  %12 = mul nsw i64 2, %11
  %13 = icmp sle i64 %10, %12
  br i1 %13, label %14, label %28

14:                                               ; preds = %9
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = load ptr, ptr %8, align 8, !tbaa !9
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds [200001 x i64], ptr %16, i64 0, i64 %17
  %19 = load i64, ptr %18, align 8, !tbaa !5
  %20 = add nsw i64 %19, %15
  store i64 %20, ptr %18, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %14
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = sub nsw i64 0, %23
  %25 = and i64 %22, %24
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = add nsw i64 %26, %25
  store i64 %27, ptr %5, align 8, !tbaa !5
  br label %9, !llvm.loop !11

28:                                               ; preds = %9
  ret void
}

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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z3updxxxRA200001_x(i64 noundef %0, i64 noundef %1, i64 noundef %2, ptr nocapture noundef nonnull align 8 dereferenceable(1600008) %3) local_unnamed_addr #0 {
  %5 = shl nsw i64 %2, 1
  %.not7 = icmp slt i64 %5, %0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.08 = phi i64 [ %11, %.lr.ph ], [ %0, %4 ]
  %6 = getelementptr inbounds [200001 x i64], ptr %3, i64 0, i64 %.08
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = add nsw i64 %7, %1
  store i64 %8, ptr %6, align 8, !tbaa !5
  %9 = sub nsw i64 0, %.08
  %10 = and i64 %.08, %9
  %11 = add nsw i64 %10, %.08
  %.not = icmp sgt i64 %11, %5
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass