; LLVM IR from Muhammad-Magdi/problem-solving :: LIS.ll (Z3LISii)

; 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"

@n = external dso_local global i32, align 4
@A = external dso_local global [1009 x i32], align 16
@mem = external dso_local global [1009 x [1009 x i32]], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z3LISii(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 %20

13:                                               ; preds = %2
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1009 x [1009 x i32]], ptr @mem, i64 0, i64 %15
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [1009 x i32], ptr %16, i64 0, i64 %18
  store i32 0, ptr %19, align 4, !tbaa !5
  store i32 0, ptr %3, align 4
  br label %61

20:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [1009 x [1009 x i32]], ptr @mem, i64 0, i64 %22
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [1009 x i32], ptr %23, i64 0, i64 %25
  store ptr %26, ptr %6, align 8, !tbaa !9
  %27 = load ptr, ptr %6, align 8, !tbaa !9
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = xor i32 %28, -1
  %30 = icmp ne i32 %29, 0
  br i1 %30, label %31, label %34

31:                                               ; preds = %20
  %32 = load ptr, ptr %6, align 8, !tbaa !9
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %60

34:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %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 @_Z3LISii(i32 noundef %36, i32 noundef %37)
  store i32 %38, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [1009 x i32], ptr @A, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !5
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [1009 x i32], ptr @A, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = icmp sgt i32 %42, %46
  br i1 %47, label %48, label %54

48:                                               ; preds = %34
  %49 = load i32, ptr %4, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = call noundef i32 @_Z3LISii(i32 noundef %50, i32 noundef %51)
  %53 = add nsw i32 %52, 1
  br label %55

54:                                               ; preds = %34
  br label %55

55:                                               ; preds = %54, %48
  %56 = phi i32 [ %53, %48 ], [ 0, %54 ]
  store i32 %56, ptr %9, align 4, !tbaa !5
  %57 = 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)
  %58 = load i32, ptr %57, align 4, !tbaa !5
  %59 = load ptr, ptr %6, align 8, !tbaa !9
  store i32 %58, ptr %59, align 4, !tbaa !5
  store i32 %58, 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 %60

60:                                               ; preds = %55, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %61

61:                                               ; preds = %60, %13
  %62 = load i32, ptr %3, align 4
  ret i32 %62
}

; 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"

@n = external dso_local local_unnamed_addr global i32, align 4
@A = external dso_local local_unnamed_addr global [1009 x i32], align 16
@mem = external dso_local local_unnamed_addr global [1009 x [1009 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3LISii(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
  %7 = sext i32 %0 to i64
  %8 = sext i32 %1 to i64
  %9 = getelementptr inbounds [1009 x [1009 x i32]], ptr @mem, i64 0, i64 %7, i64 %8
  br i1 %6, label %10, label %11

10:                                               ; preds = %2
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %28

11:                                               ; preds = %2
  %12 = load i32, ptr %9, align 4, !tbaa !5
  %.not = icmp eq i32 %12, -1
  br i1 %.not, label %13, label %28

13:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %14 = add nsw i32 %0, 1
  %15 = tail call noundef i32 @_Z3LISii(i32 noundef %14, i32 noundef %1)
  store i32 %15, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %16 = getelementptr inbounds [1009 x i32], ptr @A, i64 0, i64 %7
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = getelementptr inbounds [1009 x i32], ptr @A, i64 0, i64 %8
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = icmp sgt i32 %17, %19
  br i1 %20, label %21, label %24

21:                                               ; preds = %13
  %22 = tail call noundef i32 @_Z3LISii(i32 noundef %14, i32 noundef %0)
  %23 = add nsw i32 %22, 1
  br label %24

24:                                               ; preds = %13, %21
  %25 = phi i32 [ %23, %21 ], [ 0, %13 ]
  store i32 %25, ptr %4, align 4, !tbaa !5
  %26 = 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)
  %27 = load i32, ptr %26, align 4, !tbaa !5
  store i32 %27, ptr %9, 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 %28

28:                                               ; preds = %24, %11, %10
  %.1 = phi i32 [ 0, %10 ], [ %27, %24 ], [ %12, %11 ]
  ret i32 %.1
}

; 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,SROAPass,SimplifyCFGPass,TailCallElimPass