; LLVM IR from TLE-MEC/Hack-CP-DSA :: Codechef/Doctor Chef/solution.ll (Z13binarySearch2Pxxxx)

; 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: mustprogress uwtable
define dso_local noundef i64 @_Z13binarySearch2Pxxxx(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) #1 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store i64 %2, ptr %8, align 8, !tbaa !9
  store i64 %3, ptr %9, align 8, !tbaa !9
  %12 = load i64, ptr %8, align 8, !tbaa !9
  %13 = load i64, ptr %7, align 8, !tbaa !9
  %14 = icmp sge i64 %12, %13
  br i1 %14, label %15, label %60

15:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = load i64, ptr %8, align 8, !tbaa !9
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = sub nsw i64 %17, %18
  %20 = sdiv i64 %19, 2
  %21 = add nsw i64 %16, %20
  store i64 %21, ptr %10, align 8, !tbaa !9
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load i64, ptr %10, align 8, !tbaa !9
  %24 = getelementptr inbounds i64, ptr %22, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = load i64, ptr %9, align 8, !tbaa !9
  %27 = icmp slt i64 %25, %26
  br i1 %27, label %28, label %38

28:                                               ; preds = %15
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load i64, ptr %10, align 8, !tbaa !9
  %31 = add nsw i64 %30, 1
  %32 = getelementptr inbounds i64, ptr %29, i64 %31
  %33 = load i64, ptr %32, align 8, !tbaa !9
  %34 = load i64, ptr %9, align 8, !tbaa !9
  %35 = icmp sgt i64 %33, %34
  br i1 %35, label %36, label %38

36:                                               ; preds = %28
  %37 = load i64, ptr %10, align 8, !tbaa !9
  store i64 %37, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %59

38:                                               ; preds = %28, %15
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = load i64, ptr %10, align 8, !tbaa !9
  %41 = getelementptr inbounds i64, ptr %39, i64 %40
  %42 = load i64, ptr %41, align 8, !tbaa !9
  %43 = load i64, ptr %9, align 8, !tbaa !9
  %44 = icmp sgt i64 %42, %43
  br i1 %44, label %45, label %52

45:                                               ; preds = %38
  %46 = load ptr, ptr %6, align 8, !tbaa !5
  %47 = load i64, ptr %7, align 8, !tbaa !9
  %48 = load i64, ptr %10, align 8, !tbaa !9
  %49 = sub nsw i64 %48, 1
  %50 = load i64, ptr %9, align 8, !tbaa !9
  %51 = call noundef i64 @_Z13binarySearch2Pxxxx(ptr noundef %46, i64 noundef %47, i64 noundef %49, i64 noundef %50)
  store i64 %51, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %59

52:                                               ; preds = %38
  %53 = load ptr, ptr %6, align 8, !tbaa !5
  %54 = load i64, ptr %10, align 8, !tbaa !9
  %55 = add nsw i64 %54, 1
  %56 = load i64, ptr %8, align 8, !tbaa !9
  %57 = load i64, ptr %9, align 8, !tbaa !9
  %58 = call noundef i64 @_Z13binarySearch2Pxxxx(ptr noundef %53, i64 noundef %55, i64 noundef %56, i64 noundef %57)
  store i64 %58, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %59

59:                                               ; preds = %52, %45, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  br label %61

60:                                               ; preds = %4
  store i64 -1, ptr %5, align 8
  br label %61

61:                                               ; preds = %60, %59
  %62 = load i64, ptr %5, align 8
  ret i64 %62
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 long", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i64 @_Z13binarySearch2Pxxxx(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  %.not3135 = icmp slt i64 %2, %1
  br i1 %.not3135, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %tailrecurse.outer
  %.tr28.ph37 = phi i64 [ %.tr2832, %tailrecurse.outer ], [ %2, %4 ]
  %.tr27.ph36 = phi i64 [ %19, %tailrecurse.outer ], [ %1, %4 ]
  br label %5

5:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr2832 = phi i64 [ %.tr28.ph37, %.lr.ph ], [ %18, %tailrecurse ]
  %6 = sub nsw i64 %.tr2832, %.tr27.ph36
  %7 = sdiv i64 %6, 2
  %8 = add nsw i64 %7, %.tr27.ph36
  %9 = getelementptr inbounds i64, ptr %0, i64 %8
  %10 = load i64, ptr %9, align 8, !tbaa !5
  %11 = icmp slt i64 %10, %3
  br i1 %11, label %12, label %16

12:                                               ; preds = %5
  %13 = getelementptr i8, ptr %9, i64 8
  %14 = load i64, ptr %13, align 8, !tbaa !5
  %15 = icmp sgt i64 %14, %3
  br i1 %15, label %tailrecurse.outer._crit_edge, label %16

16:                                               ; preds = %12, %5
  %17 = icmp sgt i64 %10, %3
  br i1 %17, label %tailrecurse, label %tailrecurse.outer

tailrecurse:                                      ; preds = %16
  %18 = add nsw i64 %8, -1
  %.not.not = icmp sgt i64 %6, 1
  br i1 %.not.not, label %5, label %tailrecurse.outer._crit_edge

tailrecurse.outer:                                ; preds = %16
  %19 = add nsw i64 %8, 1
  %.not31.not = icmp sgt i64 %.tr2832, %8
  br i1 %.not31.not, label %.lr.ph, label %tailrecurse.outer._crit_edge

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %12, %tailrecurse, %4
  %.1 = phi i64 [ -1, %4 ], [ -1, %tailrecurse ], [ %8, %12 ], [ -1, %tailrecurse.outer ]
  ret i64 %.1
}

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 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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