; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Dynamic Programming (sum_of_subsets)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @findSubsetSum_worker(ptr noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #1 {
  %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
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i32 %3, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %13 = load i32, ptr %9, align 4, !tbaa !9
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %15, label %16

15:                                               ; preds = %4
  store i32 1, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %52

16:                                               ; preds = %4
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = icmp slt i32 %17, 0
  br i1 %18, label %19, label %20

19:                                               ; preds = %16
  store i32 0, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %52

20:                                               ; preds = %16
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = icmp eq i32 %21, %22
  br i1 %23, label %24, label %25

24:                                               ; preds = %20
  store i32 0, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %52

25:                                               ; preds = %20
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds i32, ptr %31, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !9
  %36 = sub nsw i32 %30, %35
  %37 = call i32 @findSubsetSum_worker(ptr noundef %26, i32 noundef %27, i32 noundef %29, i32 noundef %36)
  store i32 %37, ptr %10, align 4, !tbaa !9
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = load i32, ptr %8, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  %42 = load i32, ptr %9, align 4, !tbaa !9
  %43 = call i32 @findSubsetSum_worker(ptr noundef %38, i32 noundef %39, i32 noundef %41, i32 noundef %42)
  store i32 %43, ptr %11, align 4, !tbaa !9
  %44 = load i32, ptr %10, align 4, !tbaa !9
  %45 = icmp ne i32 %44, 0
  br i1 %45, label %49, label %46

46:                                               ; preds = %25
  %47 = load i32, ptr %11, align 4, !tbaa !9
  %48 = icmp ne i32 %47, 0
  br label %49

49:                                               ; preds = %46, %25
  %50 = phi i1 [ true, %25 ], [ %48, %46 ]
  %51 = zext i1 %50 to i32
  store i32 %51, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %52

52:                                               ; preds = %49, %24, %19, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %53 = load i32, ptr %5, align 4
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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}


; 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"

; Function Attrs: nofree nosync nounwind memory(argmem: read) uwtable
define dso_local range(i32 0, 2) i32 @findSubsetSum_worker(ptr noundef readonly %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp eq i32 %3, 0
  br i1 %5, label %common.ret19, label %6

6:                                                ; preds = %4
  %7 = icmp slt i32 %3, 0
  %8 = icmp eq i32 %2, %1
  %or.cond = or i1 %8, %7
  br i1 %or.cond, label %common.ret19, label %9

common.ret19:                                     ; preds = %6, %4, %9
  %common.ret19.op = phi i32 [ %20, %9 ], [ 1, %4 ], [ 0, %6 ]
  ret i32 %common.ret19.op

9:                                                ; preds = %6
  %10 = add nsw i32 %2, 1
  %11 = sext i32 %2 to i64
  %12 = getelementptr inbounds i32, ptr %0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = sub nsw i32 %3, %13
  %15 = tail call i32 @findSubsetSum_worker(ptr noundef %0, i32 noundef %1, i32 noundef %10, i32 noundef %14)
  %16 = tail call i32 @findSubsetSum_worker(ptr noundef %0, i32 noundef %1, i32 noundef %10, i32 noundef %3)
  %17 = icmp ne i32 %15, 0
  %18 = icmp ne i32 %16, 0
  %19 = select i1 %17, i1 true, i1 %18
  %20 = zext i1 %19 to i32
  br label %common.ret19
}

attributes #0 = { nofree nosync nounwind memory(argmem: 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" }

!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"}


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