; LLVM IR from Mohammed-Shoaib/Coding-Problems :: CodeChef/Beginner/B0063.ll (Z14countSubarraysSt6vectorIiSaIiEE)

; 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 i64 @_Z14countSubarraysSt6vectorIiSaIiEE(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  store i64 1, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !11
  br label %6

6:                                                ; preds = %33, %1
  %7 = load i32, ptr %5, align 4, !tbaa !11
  %8 = sext i32 %7 to i64
  %9 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %10 = sub i64 %9, 1
  %11 = icmp ult i64 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %38

13:                                               ; preds = %6
  %14 = load i32, ptr %5, align 4, !tbaa !11
  %15 = sext i32 %14 to i64
  %16 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %15) #2
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = load i32, ptr %5, align 4, !tbaa !11
  %19 = add nsw i32 %18, 1
  %20 = sext i32 %19 to i64
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %20) #2
  %22 = load i32, ptr %21, align 4, !tbaa !11
  %23 = icmp sgt i32 %17, %22
  br i1 %23, label %24, label %32

24:                                               ; preds = %13
  %25 = load i64, ptr %3, align 8, !tbaa !9
  %26 = load i64, ptr %3, align 8, !tbaa !9
  %27 = add nsw i64 %26, 1
  %28 = mul nsw i64 %25, %27
  %29 = sdiv i64 %28, 2
  %30 = load i64, ptr %4, align 8, !tbaa !9
  %31 = add nsw i64 %30, %29
  store i64 %31, ptr %4, align 8, !tbaa !9
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %24, %13
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %5, align 4, !tbaa !11
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %5, align 4, !tbaa !11
  %36 = load i64, ptr %3, align 8, !tbaa !9
  %37 = add nsw i64 %36, 1
  store i64 %37, ptr %3, align 8, !tbaa !9
  br label %6, !llvm.loop !13

38:                                               ; preds = %12
  %39 = load i64, ptr %3, align 8, !tbaa !9
  %40 = load i64, ptr %3, align 8, !tbaa !9
  %41 = add nsw i64 %40, 1
  %42 = mul nsw i64 %39, %41
  %43 = sdiv i64 %42, 2
  %44 = load i64, ptr %4, align 8, !tbaa !9
  %45 = add nsw i64 %44, %43
  store i64 %45, ptr %4, align 8, !tbaa !9
  %46 = load i64, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %46
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 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 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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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 i64 @_Z14countSubarraysSt6vectorIiSaIiEE(ptr noundef nonnull %0) local_unnamed_addr #0 {
  %2 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not = icmp eq i64 %2, 1
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %17, %1
  %.013.lcssa = phi i64 [ 1, %1 ], [ %18, %17 ]
  %.012.lcssa = phi i64 [ 0, %1 ], [ %.1, %17 ]
  %3 = add nsw i64 %.013.lcssa, 1
  %4 = mul nsw i64 %3, %.013.lcssa
  %5 = sdiv i64 %4, 2
  %6 = add nsw i64 %5, %.012.lcssa
  ret i64 %6

.lr.ph:                                           ; preds = %1, %17
  %indvars.iv = phi i64 [ %indvars.iv.next, %17 ], [ 0, %1 ]
  %.01217 = phi i64 [ %.1, %17 ], [ 0, %1 ]
  %.01316 = phi i64 [ %18, %17 ], [ 1, %1 ]
  %7 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #1
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv.next) #1
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp sgt i32 %8, %10
  br i1 %11, label %12, label %17

12:                                               ; preds = %.lr.ph
  %13 = add nsw i64 %.01316, 1
  %14 = mul nsw i64 %13, %.01316
  %15 = sdiv i64 %14, 2
  %16 = add nsw i64 %15, %.01217
  br label %17

17:                                               ; preds = %.lr.ph, %12
  %.114 = phi i64 [ 0, %12 ], [ %.01316, %.lr.ph ]
  %.1 = phi i64 [ %16, %12 ], [ %.01217, %.lr.ph ]
  %18 = add nsw i64 %.114, 1
  %19 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %20 = add i64 %19, -1
  %21 = icmp ugt i64 %20, %indvars.iv.next
  br i1 %21, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = { 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"}


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