; LLVM IR from eyangch/competitive-programming :: Codeforces/607/b.ll (Z3dpfii)

; 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 [500 x i32], align 16
@dp = external dso_local global [500 x [500 x i32]], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z3dpfii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %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
  %9 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = icmp sgt i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 1, ptr %3, align 4
  br label %78

14:                                               ; preds = %2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [500 x [500 x i32]], ptr @dp, i64 0, i64 %16
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [500 x i32], ptr %17, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %31

23:                                               ; preds = %14
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [500 x [500 x i32]], ptr @dp, i64 0, i64 %25
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [500 x i32], ptr %26, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  store i32 %30, ptr %3, align 4
  br label %78

31:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1000000000, ptr %6, align 4, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [500 x i32], ptr @c, i64 0, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [500 x i32], ptr @c, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = icmp eq i32 %35, %39
  br i1 %40, label %41, label %49

41:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %5, align 4, !tbaa !5
  %45 = sub nsw i32 %44, 1
  %46 = call noundef i32 @_Z3dpfii(i32 noundef %43, i32 noundef %45)
  store i32 %46, ptr %7, align 4, !tbaa !5
  %47 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %48 = load i32, ptr %47, align 4, !tbaa !5
  store i32 %48, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %49

49:                                               ; preds = %41, %31
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %50 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %50, ptr %8, align 4, !tbaa !5
  br label %51

51:                                               ; preds = %67, %49
  %52 = load i32, ptr %8, align 4, !tbaa !5
  %53 = load i32, ptr %5, align 4, !tbaa !5
  %54 = icmp slt i32 %52, %53
  br i1 %54, label %56, label %55

55:                                               ; preds = %51
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %70

56:                                               ; preds = %51
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = load i32, ptr %8, align 4, !tbaa !5
  %59 = call noundef i32 @_Z3dpfii(i32 noundef %57, i32 noundef %58)
  %60 = load i32, ptr %8, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  %62 = load i32, ptr %5, align 4, !tbaa !5
  %63 = call noundef i32 @_Z3dpfii(i32 noundef %61, i32 noundef %62)
  %64 = add nsw i32 %59, %63
  store i32 %64, ptr %9, align 4, !tbaa !5
  %65 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %66 = load i32, ptr %65, align 4, !tbaa !5
  store i32 %66, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %67

67:                                               ; preds = %56
  %68 = load i32, ptr %8, align 4, !tbaa !5
  %69 = add nsw i32 %68, 1
  store i32 %69, ptr %8, align 4, !tbaa !5
  br label %51, !llvm.loop !9

70:                                               ; preds = %55
  %71 = load i32, ptr %6, align 4, !tbaa !5
  %72 = load i32, ptr %4, align 4, !tbaa !5
  %73 = sext i32 %72 to i64
  %74 = getelementptr inbounds [500 x [500 x i32]], ptr @dp, i64 0, i64 %73
  %75 = load i32, ptr %5, align 4, !tbaa !5
  %76 = sext i32 %75 to i64
  %77 = getelementptr inbounds [500 x i32], ptr %74, i64 0, i64 %76
  store i32 %71, ptr %77, align 4, !tbaa !5
  store i32 %71, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %78

78:                                               ; preds = %70, %23, %13
  %79 = load i32, ptr %3, align 4
  ret i32 %79
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 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 = { 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 #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"

@c = external dso_local local_unnamed_addr global [500 x i32], align 16
@dp = external dso_local local_unnamed_addr global [500 x [500 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3dpfii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = icmp sgt i32 %0, %1
  br i1 %6, label %34, label %7

7:                                                ; preds = %2
  %8 = sext i32 %0 to i64
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [500 x [500 x i32]], ptr @dp, i64 0, i64 %8, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %12, label %34

12:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  store i32 1000000000, ptr %3, align 4, !tbaa !5
  %13 = getelementptr inbounds [500 x i32], ptr @c, i64 0, i64 %8
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = getelementptr inbounds [500 x i32], ptr @c, i64 0, i64 %9
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp eq i32 %14, %16
  br i1 %17, label %18, label %24

18:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %19 = add nsw i32 %0, 1
  %20 = add nsw i32 %1, -1
  %21 = tail call noundef i32 @_Z3dpfii(i32 noundef %19, i32 noundef %20)
  store i32 %21, ptr %4, align 4, !tbaa !5
  %22 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %23 = load i32, ptr %22, align 4, !tbaa !5
  store i32 %23, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  br label %24

24:                                               ; preds = %18, %12
  %25 = phi i32 [ %23, %18 ], [ 1000000000, %12 ]
  %26 = icmp slt i32 %0, %1
  br i1 %26, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %24
  %27 = phi i32 [ %25, %24 ], [ %33, %.lr.ph ]
  store i32 %27, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  br label %34

.lr.ph:                                           ; preds = %24, %.lr.ph
  %.025 = phi i32 [ %29, %.lr.ph ], [ %0, %24 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %28 = call noundef i32 @_Z3dpfii(i32 noundef %0, i32 noundef %.025)
  %29 = add i32 %.025, 1
  %30 = call noundef i32 @_Z3dpfii(i32 noundef %29, i32 noundef %1)
  %31 = add nsw i32 %30, %28
  store i32 %31, ptr %5, align 4, !tbaa !5
  %32 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  %exitcond.not = icmp eq i32 %29, %1
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

34:                                               ; preds = %7, %2, %._crit_edge
  %.021 = phi i32 [ %27, %._crit_edge ], [ 1, %2 ], [ %11, %7 ]
  ret i32 %.021
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) 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 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 = { 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 #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"}


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