; LLVM IR from begeekmyfriend/leetcode :: 0216_combination_sum_iii (combination_sum)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [19 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp ne i32 %13, 3
  br i1 %14, label %15, label %18

15:                                               ; preds = %2
  %16 = load ptr, ptr @stderr, align 8, !tbaa !9
  %17 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str) #6
  call void @exit(i32 noundef -1) #7
  unreachable

18:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #6
  %19 = load ptr, ptr %5, align 8, !tbaa !9
  %20 = getelementptr inbounds ptr, ptr %19, i64 1
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = call i32 @atoi(ptr noundef %21) #8
  store i32 %22, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #6
  %23 = load ptr, ptr %5, align 8, !tbaa !9
  %24 = getelementptr inbounds ptr, ptr %23, i64 2
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  %26 = call i32 @atoi(ptr noundef %25) #8
  store i32 %26, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #6
  store i32 0, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #6
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = load i32, ptr %9, align 4, !tbaa !5
  %29 = call ptr @combinationSum3(i32 noundef %27, i32 noundef %28, ptr noundef %11, ptr noundef %10)
  store ptr %29, ptr %12, align 8, !tbaa !9
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %59, %18
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = load i32, ptr %11, align 4, !tbaa !5
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %34, label %62

34:                                               ; preds = %30
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %54, %34
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = load ptr, ptr %10, align 8, !tbaa !9
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %37, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = icmp slt i32 %36, %41
  br i1 %42, label %43, label %57

43:                                               ; preds = %35
  %44 = load ptr, ptr %12, align 8, !tbaa !9
  %45 = load i32, ptr %6, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds ptr, ptr %44, i64 %46
  %48 = load ptr, ptr %47, align 8, !tbaa !9
  %49 = load i32, ptr %7, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %48, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !5
  %53 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %52)
  br label %54

54:                                               ; preds = %43
  %55 = load i32, ptr %7, align 4, !tbaa !5
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %7, align 4, !tbaa !5
  br label %35, !llvm.loop !11

57:                                               ; preds = %35
  %58 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %59

59:                                               ; preds = %57
  %60 = load i32, ptr %6, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %6, align 4, !tbaa !5
  br label %30, !llvm.loop !13

62:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  ret i32 0
}

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #1

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #4

; Function Attrs: nounwind uwtable
declare hidden ptr @combinationSum3(i32 noundef, i32 noundef, ptr noundef, ptr noundef) #0

declare i32 @printf(ptr noundef, ...) #5

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

attributes #0 = { 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 = { 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 = { noreturn 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint nounwind willreturn memory(read) 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 = { "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 }
attributes #7 = { noreturn nounwind }
attributes #8 = { nounwind willreturn memory(read) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [19 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %.not = icmp eq i32 %0, 3
  br i1 %.not, label %8, label %5

5:                                                ; preds = %2
  %6 = load ptr, ptr @stderr, align 8, !tbaa !5
  %7 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %6, ptr noundef nonnull @.str) #5
  tail call void @exit(i32 noundef -1) #6
  unreachable

8:                                                ; preds = %2
  %9 = getelementptr inbounds i8, ptr %1, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %11 = tail call i32 @atoi(ptr nocapture noundef %10) #7
  %12 = getelementptr inbounds i8, ptr %1, i64 16
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %14 = tail call i32 @atoi(ptr nocapture noundef %13) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #8
  store i32 0, ptr %4, align 4, !tbaa !9
  %15 = call ptr @combinationSum3(i32 noundef %11, i32 noundef %14, ptr noundef nonnull %4, ptr noundef nonnull %3)
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = icmp sgt i32 %16, 0
  br i1 %17, label %.preheader, label %._crit_edge15

.preheader:                                       ; preds = %8, %._crit_edge
  %indvars.iv17 = phi i64 [ %indvars.iv.next18, %._crit_edge ], [ 0, %8 ]
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds i32, ptr %18, i64 %indvars.iv17
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = icmp sgt i32 %20, 0
  br i1 %21, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader
  %22 = getelementptr inbounds ptr, ptr %15, i64 %indvars.iv17
  br label %23

23:                                               ; preds = %.lr.ph, %23
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %23 ]
  %24 = load ptr, ptr %22, align 8, !tbaa !5
  %25 = getelementptr inbounds i32, ptr %24, i64 %indvars.iv
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %26)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds i32, ptr %28, i64 %indvars.iv17
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = icmp slt i64 %indvars.iv.next, %31
  br i1 %32, label %23, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %23, %.preheader
  %33 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %indvars.iv.next18 = add nuw nsw i64 %indvars.iv17, 1
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = icmp slt i64 %indvars.iv.next18, %35
  br i1 %36, label %.preheader, label %._crit_edge15, !llvm.loop !13

._crit_edge15:                                    ; preds = %._crit_edge, %8
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #8
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #8
  ret i32 0
}

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #4

; Function Attrs: nounwind uwtable
declare hidden ptr @combinationSum3(i32 noundef, i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

attributes #0 = { 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 = { 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 = { noreturn 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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 = { cold nounwind }
attributes #6 = { noreturn nounwind }
attributes #7 = { nounwind willreturn memory(read) }
attributes #8 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass