; LLVM IR from brpapa/algorithms :: solutions/uri/2498.ll (Z4ksTDii)

; 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"

@memo = external dso_local global [1010 x [101 x i32]], align 16
@n = external dso_local global i32, align 4
@wgt = external dso_local global [1010 x i32], align 16
@val = external dso_local global [1010 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z4ksTDii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %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 @n, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  br label %63

14:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [1010 x [101 x i32]], ptr @memo, i64 0, i64 %16
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [101 x i32], ptr %17, i64 0, i64 %19
  store ptr %20, ptr %6, align 8, !tbaa !9
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp ne i32 %22, -1
  br i1 %23, label %24, label %27

24:                                               ; preds = %14
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  %26 = load i32, ptr %25, align 4, !tbaa !5
  store i32 %26, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %62

27:                                               ; preds = %14
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [1010 x i32], ptr @wgt, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = icmp sgt i32 %31, %32
  br i1 %33, label %34, label %40

34:                                               ; preds = %27
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = call noundef i32 @_Z4ksTDii(i32 noundef %36, i32 noundef %37)
  %39 = load ptr, ptr %6, align 8, !tbaa !9
  store i32 %38, ptr %39, align 4, !tbaa !5
  store i32 %38, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %62

40:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = call noundef i32 @_Z4ksTDii(i32 noundef %42, i32 noundef %43)
  store i32 %44, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %45 = load i32, ptr %4, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [1010 x i32], ptr @val, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = load i32, ptr %4, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  %51 = load i32, ptr %5, align 4, !tbaa !5
  %52 = load i32, ptr %4, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [1010 x i32], ptr @wgt, i64 0, i64 %53
  %55 = load i32, ptr %54, align 4, !tbaa !5
  %56 = sub nsw i32 %51, %55
  %57 = call noundef i32 @_Z4ksTDii(i32 noundef %50, i32 noundef %56)
  %58 = add nsw i32 %48, %57
  store i32 %58, ptr %9, align 4, !tbaa !5
  %59 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %8, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = load ptr, ptr %6, align 8, !tbaa !9
  store i32 %60, ptr %61, align 4, !tbaa !5
  store i32 %60, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  store i32 1, ptr %7, align 4
  br label %62

62:                                               ; preds = %40, %34, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %63

63:                                               ; preds = %62, %13
  %64 = load i32, ptr %3, align 4
  ret i32 %64
}

; 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 @_ZSt3maxIiERKT_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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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"

@memo = external dso_local local_unnamed_addr global [1010 x [101 x i32]], align 16
@n = external dso_local local_unnamed_addr global i32, align 4
@wgt = external dso_local local_unnamed_addr global [1010 x i32], align 16
@val = external dso_local local_unnamed_addr global [1010 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4ksTDii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = load i32, ptr @n, align 4, !tbaa !5
  %6 = icmp eq i32 %5, %0
  br i1 %6, label %common.ret21, label %7

7:                                                ; preds = %2
  %8 = sext i32 %0 to i64
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [1010 x [101 x i32]], ptr @memo, i64 0, i64 %8, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %.not = icmp eq i32 %11, -1
  br i1 %.not, label %12, label %common.ret21

12:                                               ; preds = %7
  %13 = getelementptr inbounds [1010 x i32], ptr @wgt, i64 0, i64 %8
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, %1
  br i1 %15, label %16, label %19

common.ret21:                                     ; preds = %7, %2, %19, %16
  %common.ret21.op = phi i32 [ %18, %16 ], [ %29, %19 ], [ 0, %2 ], [ %11, %7 ]
  ret i32 %common.ret21.op

16:                                               ; preds = %12
  %17 = add nsw i32 %0, 1
  %18 = tail call noundef i32 @_Z4ksTDii(i32 noundef %17, i32 noundef %1)
  store i32 %18, ptr %10, align 4, !tbaa !5
  br label %common.ret21

19:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %20 = add nsw i32 %0, 1
  %21 = tail call noundef i32 @_Z4ksTDii(i32 noundef %20, i32 noundef %1)
  store i32 %21, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %22 = getelementptr inbounds [1010 x i32], ptr @val, i64 0, i64 %8
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = load i32, ptr %13, align 4, !tbaa !5
  %25 = sub nsw i32 %1, %24
  %26 = tail call noundef i32 @_Z4ksTDii(i32 noundef %20, i32 noundef %25)
  %27 = add nsw i32 %26, %23
  store i32 %27, ptr %4, align 4, !tbaa !5
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  br label %common.ret21
}

; 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 @_ZSt3maxIiERKT_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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass