; LLVM IR from tangjz/acm-icpc :: lydsy/1436.ll (Z1Cxx)

; 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"

@c = external dso_local global [3 x [3 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z1Cxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %25, %2
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp ne i64 %7, 0
  br i1 %8, label %9, label %12

9:                                                ; preds = %6
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp ne i32 %10, 0
  br label %12

12:                                               ; preds = %9, %6
  %13 = phi i1 [ false, %6 ], [ %11, %9 ]
  br i1 %13, label %14, label %30

14:                                               ; preds = %12
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = srem i64 %16, 3
  %18 = getelementptr inbounds [3 x [3 x i32]], ptr @c, i64 0, i64 %17
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = srem i64 %19, 3
  %21 = getelementptr inbounds [3 x i32], ptr %18, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = mul nsw i32 %15, %22
  %24 = srem i32 %23, 3
  store i32 %24, ptr %5, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %14
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = sdiv i64 %26, 3
  store i64 %27, ptr %3, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = sdiv i64 %28, 3
  store i64 %29, ptr %4, align 8, !tbaa !5
  br label %6, !llvm.loop !11

30:                                               ; preds = %12
  %31 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %31
}

; 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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

@c = external dso_local local_unnamed_addr global [3 x [3 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 -2, 3) i32 @_Z1Cxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.012 = phi i32 [ %8, %.lr.ph ], [ 1, %2 ]
  %.0811 = phi i64 [ %10, %.lr.ph ], [ %1, %2 ]
  %.0910 = phi i64 [ %9, %.lr.ph ], [ %0, %2 ]
  %3 = srem i64 %.0910, 3
  %4 = srem i64 %.0811, 3
  %5 = getelementptr inbounds [3 x [3 x i32]], ptr @c, i64 0, i64 %3, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = mul nsw i32 %6, %.012
  %8 = srem i32 %7, 3
  %9 = sdiv i64 %.0910, 3
  %10 = sdiv i64 %.0811, 3
  %11 = add i64 %.0910, -3
  %12 = icmp ult i64 %11, -5
  %13 = icmp ne i32 %8, 0
  %14 = select i1 %12, i1 %13, i1 false
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i32 [ 1, %2 ], [ %8, %.lr.ph ]
  ret i32 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) 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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass