; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ (2085)

; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  br label %7

7:                                                ; preds = %33, %0
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  %9 = icmp ne i32 %8, -1
  br i1 %9, label %10, label %13

10:                                               ; preds = %7
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp ne i32 %11, -1
  br label %13

13:                                               ; preds = %10, %7
  %14 = phi i1 [ false, %7 ], [ %12, %10 ]
  br i1 %14, label %15, label %37

15:                                               ; preds = %13
  store i64 1, ptr %4, align 8, !tbaa !9
  store i64 0, ptr %5, align 8, !tbaa !9
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %30, %15
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %33

20:                                               ; preds = %16
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = mul nsw i64 %21, 3
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = mul nsw i64 %23, 2
  %25 = add nsw i64 %22, %24
  store i64 %25, ptr %6, align 8, !tbaa !9
  %26 = load i64, ptr %4, align 8, !tbaa !9
  %27 = load i64, ptr %5, align 8, !tbaa !9
  %28 = add nsw i64 %26, %27
  store i64 %28, ptr %5, align 8, !tbaa !9
  %29 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %29, ptr %4, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %20
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %3, align 4, !tbaa !5
  br label %16, !llvm.loop !11

33:                                               ; preds = %16
  %34 = load i64, ptr %4, align 8, !tbaa !9
  %35 = load i64, ptr %5, align 8, !tbaa !9
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %34, i64 noundef %35)
  br label %7, !llvm.loop !13

37:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

declare i32 @printf(ptr noundef, ...) #2

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

attributes #0 = { mustprogress norecurse 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 = { "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}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = icmp ne i32 %2, -1
  %4 = load i32, ptr %1, align 4
  %5 = icmp ne i32 %4, -1
  %6 = select i1 %3, i1 %5, i1 false
  br i1 %6, label %.preheader, label %._crit_edge15

.preheader:                                       ; preds = %0, %._crit_edge
  %7 = phi i32 [ %33, %._crit_edge ], [ %4, %0 ]
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader
  %xtraiter = and i32 %7, 3
  %9 = icmp ult i32 %7, 4
  br i1 %9, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i32 %7, 2147483644
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.0912 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %25, %.lr.ph ]
  %.01011 = phi i64 [ 1, %.lr.ph.preheader.new ], [ %24, %.lr.ph ]
  %niter = phi i32 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %10 = mul nsw i64 %.01011, 3
  %11 = shl nsw i64 %.0912, 1
  %12 = add nsw i64 %11, %10
  %13 = add nsw i64 %.0912, %.01011
  %14 = mul nsw i64 %12, 3
  %15 = shl nsw i64 %13, 1
  %16 = add nsw i64 %15, %14
  %17 = add nsw i64 %13, %12
  %18 = mul nsw i64 %16, 3
  %19 = shl nsw i64 %17, 1
  %20 = add nsw i64 %19, %18
  %21 = add nsw i64 %17, %16
  %22 = mul nsw i64 %20, 3
  %23 = shl nsw i64 %21, 1
  %24 = add nsw i64 %23, %22
  %25 = add nsw i64 %21, %20
  %niter.next.3 = add i32 %niter, 4
  %niter.ncmp.3 = icmp eq i32 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !5

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa19.ph = phi i64 [ poison, %.lr.ph.preheader ], [ %24, %.lr.ph ]
  %.lcssa.ph = phi i64 [ poison, %.lr.ph.preheader ], [ %25, %.lr.ph ]
  %.0912.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %25, %.lr.ph ]
  %.01011.unr = phi i64 [ 1, %.lr.ph.preheader ], [ %24, %.lr.ph ]
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.0912.epil = phi i64 [ %29, %.lr.ph.epil ], [ %.0912.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.01011.epil = phi i64 [ %28, %.lr.ph.epil ], [ %.01011.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %26 = mul nsw i64 %.01011.epil, 3
  %27 = shl nsw i64 %.0912.epil, 1
  %28 = add nsw i64 %27, %26
  %29 = add nsw i64 %.0912.epil, %.01011.epil
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !7

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %.preheader
  %.010.lcssa = phi i64 [ 1, %.preheader ], [ %.lcssa19.ph, %._crit_edge.loopexit.unr-lcssa ], [ %28, %.lr.ph.epil ]
  %.09.lcssa = phi i64 [ 0, %.preheader ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %29, %.lr.ph.epil ]
  %30 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.010.lcssa, i64 noundef %.09.lcssa)
  %31 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %32 = icmp ne i32 %31, -1
  %33 = load i32, ptr %1, align 4
  %34 = icmp ne i32 %33, -1
  %35 = select i1 %32, i1 %34, i1 false
  br i1 %35, label %.preheader, label %._crit_edge15, !llvm.loop !9

._crit_edge15:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

attributes #0 = { mustprogress nofree norecurse 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !8}
!8 = !{!"llvm.loop.unroll.disable"}
!9 = distinct !{!9, !6}


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