; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 06. Searching/01 Binary Search/01a.ll (Z12binarySearchSt6vectorIiSaIiEEi)

; 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 i32 @_Z12binarySearchSt6vectorIiSaIiEEi(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %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
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %11 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %12 = trunc i64 %11 to i32
  store i32 %12, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = sub nsw i32 %13, 1
  store i32 %14, ptr %8, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %49, %2
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = load i32, ptr %8, align 4, !tbaa !9
  %18 = icmp sle i32 %16, %17
  br i1 %18, label %19, label %50

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = add nsw i32 %20, %21
  %23 = sdiv i32 %22, 2
  store i32 %23, ptr %9, align 4, !tbaa !9
  %24 = load i32, ptr %9, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %25) #2
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = icmp eq i32 %27, %28
  br i1 %29, label %30, label %32

30:                                               ; preds = %19
  %31 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %31, ptr %3, align 4
  store i32 1, ptr %10, align 4
  br label %47

32:                                               ; preds = %19
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %34) #2
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = icmp sgt i32 %36, %37
  br i1 %38, label %39, label %42

39:                                               ; preds = %32
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = sub nsw i32 %40, 1
  store i32 %41, ptr %8, align 4, !tbaa !9
  br label %45

42:                                               ; preds = %32
  %43 = load i32, ptr %9, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %7, align 4, !tbaa !9
  br label %45

45:                                               ; preds = %42, %39
  br label %46

46:                                               ; preds = %45
  store i32 0, ptr %10, align 4
  br label %47

47:                                               ; preds = %46, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  %48 = load i32, ptr %10, align 4
  switch i32 %48, label %51 [
    i32 0, label %49
  ]

49:                                               ; preds = %47
  br label %15, !llvm.loop !11

50:                                               ; preds = %15
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %10, align 4
  br label %51

51:                                               ; preds = %50, %47
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %52 = load i32, ptr %3, align 4
  ret i32 %52
}

; 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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 i32 @_Z12binarySearchSt6vectorIiSaIiEEi(ptr noundef nonnull %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %4 = trunc i64 %3 to i32
  %.not26 = icmp slt i32 %4, 1
  br i1 %.not26, label %.thread, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %5 = add nsw i32 %4, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %11
  %.01528 = phi i32 [ %.116, %11 ], [ %5, %.lr.ph.preheader ]
  %.01827 = phi i32 [ %.119, %11 ], [ 0, %.lr.ph.preheader ]
  %6 = add nuw nsw i32 %.01528, %.01827
  %7 = lshr i32 %6, 1
  %8 = zext nneg i32 %7 to i64
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %.not22 = icmp eq i32 %10, %1
  br i1 %.not22, label %.thread, label %11

11:                                               ; preds = %.lr.ph
  %12 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %8) #1
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, %1
  %15 = add nsw i32 %7, -1
  %16 = add nuw nsw i32 %7, 1
  %.119 = select i1 %14, i32 %.01827, i32 %16
  %.116 = select i1 %14, i32 %15, i32 %.01528
  %.not = icmp sgt i32 %.119, %.116
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %11, %.lr.ph, %2
  %.2 = phi i32 [ -1, %2 ], [ %7, %.lr.ph ], [ -1, %11 ]
  ret i32 %.2
}

; 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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass