; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 05. Arrays/24 Find Subarray with Given Sum (24a Check Subarray with Given 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z8subArrayPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i1, align 1
  %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 i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %46, %3
  %13 = load i32, ptr %8, align 4, !tbaa !9
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  store i32 2, ptr %9, align 4
  br label %49

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %18 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %18, ptr %11, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %37, %17
  %20 = load i32, ptr %11, align 4, !tbaa !9
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  store i32 5, ptr %9, align 4
  br label %40

24:                                               ; preds = %19
  %25 = load i32, ptr %10, align 4, !tbaa !9
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load i32, ptr %11, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = add nsw i32 %25, %30
  store i32 %31, ptr %10, align 4, !tbaa !9
  %32 = load i32, ptr %10, align 4, !tbaa !9
  %33 = load i32, ptr %7, align 4, !tbaa !9
  %34 = icmp eq i32 %32, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %24
  store i1 true, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %40

36:                                               ; preds = %24
  br label %37

37:                                               ; preds = %36
  %38 = load i32, ptr %11, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %11, align 4, !tbaa !9
  br label %19, !llvm.loop !11

40:                                               ; preds = %35, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  %41 = load i32, ptr %9, align 4
  switch i32 %41, label %43 [
    i32 5, label %42
  ]

42:                                               ; preds = %40
  store i32 0, ptr %9, align 4
  br label %43

43:                                               ; preds = %42, %40
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %44 = load i32, ptr %9, align 4
  switch i32 %44, label %49 [
    i32 0, label %45
  ]

45:                                               ; preds = %43
  br label %46

46:                                               ; preds = %45
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %8, align 4, !tbaa !9
  br label %12, !llvm.loop !13

49:                                               ; preds = %43, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %50 = load i32, ptr %9, align 4
  switch i32 %50, label %54 [
    i32 2, label %51
    i32 1, label %52
  ]

51:                                               ; preds = %49
  store i1 false, ptr %4, align 1
  br label %52

52:                                               ; preds = %51, %49
  %53 = load i1, ptr %4, align 1
  ret i1 %53

54:                                               ; preds = %49
  unreachable
}

; 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

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 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef zeroext i1 @_Z8subArrayPiii(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not2430 = icmp sgt i32 %1, 0
  br i1 %.not2430, label %.preheader.preheader, label %.thread

.preheader.preheader:                             ; preds = %3
  %wide.trip.count38 = zext nneg i32 %1 to i64
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %10
  %indvars.iv = phi i64 [ 0, %.preheader.preheader ], [ %indvars.iv.next, %10 ]
  %.not2432 = phi i1 [ true, %.preheader.preheader ], [ %.not24, %10 ]
  %.01831 = phi i32 [ 0, %.preheader.preheader ], [ %11, %10 ]
  br label %5

4:                                                ; preds = %5
  %indvars.iv.next36 = add nuw nsw i64 %indvars.iv35, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next36, %wide.trip.count38
  br i1 %exitcond.not, label %10, label %5, !llvm.loop !5

5:                                                ; preds = %.preheader, %4
  %indvars.iv35 = phi i64 [ %indvars.iv, %.preheader ], [ %indvars.iv.next36, %4 ]
  %.01628 = phi i32 [ 0, %.preheader ], [ %8, %4 ]
  %6 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv35
  %7 = load i32, ptr %6, align 4, !tbaa !7
  %8 = add nsw i32 %7, %.01628
  %9 = icmp eq i32 %8, %2
  br i1 %9, label %.thread, label %4

10:                                               ; preds = %4
  %11 = add nuw nsw i32 %.01831, 1
  %.not24 = icmp slt i32 %11, %1
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond39.not = icmp eq i64 %indvars.iv.next, %wide.trip.count38
  br i1 %exitcond39.not, label %.thread, label %.preheader, !llvm.loop !11

.thread:                                          ; preds = %10, %5, %3
  %.not2427 = phi i1 [ false, %3 ], [ %.not2432, %5 ], [ %.not24, %10 ]
  ret i1 %.not2427
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = distinct !{!11, !6}


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