; LLVM IR from sbshah97/DS-Algo-Handbook :: Algorithms/Dynamic_Programming/LIS (lis)

; 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"

@l = external dso_local global [20 x i32], align 16
@arr = external dso_local global [20 x i32], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z13biggerElementii(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 norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %20, %0
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  br label %23

12:                                               ; preds = %7
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [20 x i32], ptr @arr, i64 0, i64 %14
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %15)
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %18
  store i32 1, ptr %19, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %12
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !5
  br label %7, !llvm.loop !9

23:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #6
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = sub nsw i32 %24, 2
  store i32 %25, ptr %4, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %43, %23
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = icmp sge i32 %27, 0
  br i1 %28, label %30, label %29

29:                                               ; preds = %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #6
  br label %46

30:                                               ; preds = %26
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %33
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = load i32, ptr %2, align 4, !tbaa !5
  %37 = call noundef i32 @_Z13biggerElementii(i32 noundef %35, i32 noundef %36)
  store i32 %37, ptr %5, align 4, !tbaa !5
  %38 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %34, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %41
  store i32 %39, ptr %42, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  br label %43

43:                                               ; preds = %30
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = add nsw i32 %44, -1
  store i32 %45, ptr %4, align 4, !tbaa !5
  br label %26, !llvm.loop !11

46:                                               ; preds = %29
  %47 = load i32, ptr %2, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr @l, i64 %48
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef @l, ptr noundef %49)
  %50 = load i32, ptr %2, align 4, !tbaa !5
  %51 = sub nsw i32 %50, 1
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %52
  %54 = load i32, ptr %53, align 4, !tbaa !5
  %55 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %54)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

; 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)) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) #5

declare i32 @printf(ptr noundef, ...) #3

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 = { 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 = { "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 = { 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 #5 = { inlinehint 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 #6 = { 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"}
!11 = distinct !{!11, !10}


; 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"

@l = external dso_local global [20 x i32], align 16
@arr = external dso_local global [20 x i32], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z13biggerElementii(i32 noundef, i32 noundef) local_unnamed_addr #0

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

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge15

._crit_edge:                                      ; preds = %.lr.ph
  %6 = icmp sgt i32 %12, 1
  br i1 %6, label %.lr.ph14.preheader, label %._crit_edge15

.lr.ph14.preheader:                               ; preds = %._crit_edge
  %7 = add nsw i32 %12, -2
  %8 = zext nneg i32 %7 to i64
  br label %.lr.ph14

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %9 = getelementptr inbounds [20 x i32], ptr @arr, i64 0, i64 %indvars.iv
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %9)
  %11 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %indvars.iv
  store i32 1, ptr %11, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = icmp slt i64 %indvars.iv.next, %13
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge15.loopexit:                           ; preds = %.lr.ph14
  %.pre = load i32, ptr %1, align 4, !tbaa !5
  br label %._crit_edge15

._crit_edge15:                                    ; preds = %0, %._crit_edge15.loopexit, %._crit_edge
  %15 = phi i32 [ %.pre, %._crit_edge15.loopexit ], [ %12, %._crit_edge ], [ %4, %0 ]
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr @l, i64 %16
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef nonnull @l, ptr noundef nonnull %17)
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = add nsw i32 %18, -1
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %22)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #6
  ret i32 0

.lr.ph14:                                         ; preds = %.lr.ph14.preheader, %.lr.ph14
  %indvars.iv18 = phi i64 [ %8, %.lr.ph14.preheader ], [ %indvars.iv.next19, %.lr.ph14 ]
  %24 = add nuw nsw i64 %indvars.iv18, 1
  %25 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %24
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  %26 = load i32, ptr %1, align 4, !tbaa !5
  %27 = trunc nuw nsw i64 %indvars.iv18 to i32
  %28 = call noundef i32 @_Z13biggerElementii(i32 noundef %27, i32 noundef %26)
  store i32 %28, ptr %2, align 4, !tbaa !5
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %25, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = getelementptr inbounds [20 x i32], ptr @l, i64 0, i64 %indvars.iv18
  store i32 %30, ptr %31, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  %indvars.iv.next19 = add nsw i64 %indvars.iv18, -1
  %.not = icmp eq i64 %indvars.iv18, 0
  br i1 %.not, label %._crit_edge15.loopexit, label %.lr.ph14, !llvm.loop !11
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; 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 #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) local_unnamed_addr #5

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

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 = { 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 = { 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 #4 = { 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 #5 = { inlinehint 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 #6 = { 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"}
!11 = distinct !{!11, !10}


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