; LLVM IR from Muhammad-Magdi/problem-solving :: LIS (main)

; 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
@.str.2 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [1 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [31 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3LISii(i32 noundef, i32 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8buildLISii(i32 noundef, i32 noundef) #0

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z12iterativeLISv() #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z27binarySearchLISWithBuildingv() #0

declare i32 @puts(ptr noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z14segmentTreeLISv() #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.memset.p0.i64(ptr align 16 @mem, i8 -1, i64 4072324, i1 false)
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.5, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %14, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = icmp slt i32 %5, %6
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %17

9:                                                ; preds = %4
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds i32, ptr @A, i64 %11
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.5, ptr noundef %12)
  br label %14

14:                                               ; preds = %9
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !9

17:                                               ; preds = %8
  %18 = load i32, ptr @n, align 4, !tbaa !5
  %19 = call noundef i32 @_Z3LISii(i32 noundef 0, i32 noundef %18)
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i32 noundef %19)
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %22 = load i32, ptr @n, align 4, !tbaa !5
  call void @_Z8buildLISii(i32 noundef 0, i32 noundef %22)
  %23 = call i32 @puts(ptr noundef @.str.3)
  %24 = call noundef i32 @_Z12iterativeLISv()
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, i32 noundef %24)
  %26 = load i32, ptr @n, align 4, !tbaa !5
  %27 = call noundef i32 @_Z3LISii(i32 noundef 0, i32 noundef %26)
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %27)
  call void @_Z27binarySearchLISWithBuildingv()
  call void @_Z14segmentTreeLISv()
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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

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 = { "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 = { 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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"

@n = external dso_local global i32, align 4
@A = external dso_local global [1009 x i32], align 16
@mem = external dso_local local_unnamed_addr global [1009 x [1009 x i32]], align 16
@.str.2 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [1 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [31 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3LISii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8buildLISii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z12iterativeLISv() local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z27binarySearchLISWithBuildingv() local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z14segmentTreeLISv() local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(4072324) @mem, i8 -1, i64 4072324, i1 false)
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.5, ptr noundef nonnull @n)
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.lcssa = phi i32 [ %2, %0 ], [ %16, %.lr.ph ]
  %4 = tail call noundef i32 @_Z3LISii(i32 noundef 0, i32 noundef %.lcssa)
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i32 noundef %4)
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %7 = load i32, ptr @n, align 4, !tbaa !5
  tail call void @_Z8buildLISii(i32 noundef 0, i32 noundef %7)
  %8 = tail call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.3)
  %9 = tail call noundef i32 @_Z12iterativeLISv()
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %9)
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = tail call noundef i32 @_Z3LISii(i32 noundef 0, i32 noundef %11)
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %12)
  tail call void @_Z27binarySearchLISWithBuildingv()
  tail call void @_Z14segmentTreeLISv()
  ret i32 0

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %14 = getelementptr inbounds i32, ptr @A, i64 %indvars.iv
  %15 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.5, ptr noundef nonnull %14)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = load i32, ptr @n, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = icmp slt i64 %indvars.iv.next, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #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 = { 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 #2 = { 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 #3 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }

!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,SROAPass,SimplifyCFGPass,TailCallElimPass