; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 09. Hashing/12 Longest Common Span with Same Sum in Binary Array/12a Longest Common_1d4d1621 (i)

; 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 uwtable
define dso_local noundef i32 @_Z17longestCommonSpanPiS_i(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %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
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %56, %3
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %59

19:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %20 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %20, ptr %12, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %52, %19
  %22 = load i32, ptr %12, align 4, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = icmp slt i32 %22, %23
  br i1 %24, label %26, label %25

25:                                               ; preds = %21
  store i32 5, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %55

26:                                               ; preds = %21
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %12, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i32, ptr %27, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = load i32, ptr %10, align 4, !tbaa !9
  %33 = add nsw i32 %32, %31
  store i32 %33, ptr %10, align 4, !tbaa !9
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load i32, ptr %12, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = load i32, ptr %11, align 4, !tbaa !9
  %40 = add nsw i32 %39, %38
  store i32 %40, ptr %11, align 4, !tbaa !9
  %41 = load i32, ptr %10, align 4, !tbaa !9
  %42 = load i32, ptr %11, align 4, !tbaa !9
  %43 = icmp eq i32 %41, %42
  br i1 %43, label %44, label %51

44:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  %45 = load i32, ptr %12, align 4, !tbaa !9
  %46 = load i32, ptr %8, align 4, !tbaa !9
  %47 = sub nsw i32 %45, %46
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %13, align 4, !tbaa !9
  %49 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %13)
  %50 = load i32, ptr %49, align 4, !tbaa !9
  store i32 %50, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  br label %51

51:                                               ; preds = %44, %26
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %12, align 4, !tbaa !9
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %12, align 4, !tbaa !9
  br label %21, !llvm.loop !11

55:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %8, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %8, align 4, !tbaa !9
  br label %14, !llvm.loop !13

59:                                               ; preds = %18
  %60 = load i32, ptr %7, align 4, !tbaa !9
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret i32 %60
}

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

; 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)) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 nounwind uwtable
define dso_local noundef i32 @_Z17longestCommonSpanPiS_i(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  %6 = icmp sgt i32 %2, 0
  br i1 %6, label %.preheader.preheader, label %._crit_edge

.preheader.preheader:                             ; preds = %3
  %wide.trip.count29 = zext nneg i32 %2 to i64
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %9
  %7 = phi i32 [ 0, %.preheader.preheader ], [ %26, %9 ]
  %indvars.iv = phi i64 [ 0, %.preheader.preheader ], [ %indvars.iv.next, %9 ]
  br label %10

._crit_edge:                                      ; preds = %9, %3
  %8 = phi i32 [ 0, %3 ], [ %26, %9 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  ret i32 %8

9:                                                ; preds = %25
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond30.not = icmp eq i64 %indvars.iv.next, %wide.trip.count29
  br i1 %exitcond30.not, label %._crit_edge, label %.preheader, !llvm.loop !9

10:                                               ; preds = %.preheader, %25
  %11 = phi i32 [ %7, %.preheader ], [ %26, %25 ]
  %indvars.iv24 = phi i64 [ %indvars.iv, %.preheader ], [ %indvars.iv.next25, %25 ]
  %.01621 = phi i32 [ 0, %.preheader ], [ %17, %25 ]
  %.01720 = phi i32 [ 0, %.preheader ], [ %14, %25 ]
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv24
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = add nsw i32 %13, %.01720
  %15 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv24
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = add nsw i32 %16, %.01621
  %18 = icmp eq i32 %14, %17
  br i1 %18, label %19, label %25

19:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %20 = sub nuw nsw i64 %indvars.iv24, %indvars.iv
  %21 = trunc i64 %20 to i32
  %22 = add i32 %21, 1
  store i32 %22, ptr %5, align 4, !tbaa !5
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %24 = load i32, ptr %23, align 4, !tbaa !5
  store i32 %24, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  br label %25

25:                                               ; preds = %10, %19
  %26 = phi i32 [ %11, %10 ], [ %24, %19 ]
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next25, %wide.trip.count29
  br i1 %exitcond.not, label %9, label %10, !llvm.loop !11
}

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

; 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 #2

; Function Attrs: mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass