; LLVM IR from eyangch/competitive-programming :: USACOcontests/gold/2016.01/angry.ll (Z7binSrchiPii)

; 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 @_Z7binSrchiPii(i32 noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %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
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sub nsw i32 %10, 1
  store i32 %11, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %8, align 4, !tbaa !5
  %14 = add nsw i32 %12, %13
  %15 = sdiv i32 %14, 2
  store i32 %15, ptr %9, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %34, %3
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %39

20:                                               ; preds = %16
  %21 = load ptr, ptr %5, align 8, !tbaa !9
  %22 = load i32, ptr %9, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = icmp sgt i32 %25, %26
  br i1 %27, label %28, label %31

28:                                               ; preds = %20
  %29 = load i32, ptr %9, align 4, !tbaa !5
  %30 = sub nsw i32 %29, 1
  store i32 %30, ptr %8, align 4, !tbaa !5
  br label %34

31:                                               ; preds = %20
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %7, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %31, %28
  %35 = load i32, ptr %7, align 4, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !5
  %37 = add nsw i32 %35, %36
  %38 = sdiv i32 %37, 2
  store i32 %38, ptr %9, align 4, !tbaa !5
  br label %16, !llvm.loop !11

39:                                               ; preds = %16
  %40 = load ptr, ptr %5, align 8, !tbaa !9
  %41 = load i32, ptr %9, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = load i32, ptr %6, align 4, !tbaa !5
  %46 = icmp slt i32 %44, %45
  br i1 %46, label %47, label %50

47:                                               ; preds = %39
  %48 = load i32, ptr %9, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %9, align 4, !tbaa !5
  br label %50

50:                                               ; preds = %47, %39
  %51 = load i32, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %51
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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 nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef range(i32 -1073741824, 1073741825) i32 @_Z7binSrchiPii(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = add nsw i32 %0, -1
  %.020 = sdiv i32 %4, 2
  %5 = icmp sgt i32 %0, 1
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.023 = phi i32 [ %.0, %.lr.ph ], [ %.020, %3 ]
  %.01622 = phi i32 [ %.117, %.lr.ph ], [ %4, %3 ]
  %.01821 = phi i32 [ %.119, %.lr.ph ], [ 0, %3 ]
  %6 = sext i32 %.023 to i64
  %7 = getelementptr inbounds i32, ptr %1, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, %2
  %10 = add nsw i32 %.023, -1
  %11 = add nsw i32 %.023, 1
  %.119 = select i1 %9, i32 %.01821, i32 %11
  %.117 = select i1 %9, i32 %10, i32 %.01622
  %12 = add nsw i32 %.119, %.117
  %.0 = sdiv i32 %12, 2
  %13 = icmp slt i32 %.119, %.117
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi i32 [ %.020, %3 ], [ %.0, %.lr.ph ]
  %14 = sext i32 %.0.lcssa to i64
  %15 = getelementptr inbounds i32, ptr %1, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp slt i32 %16, %2
  %18 = zext i1 %17 to i32
  %spec.select = add nsw i32 %.0.lcssa, %18
  ret i32 %spec.select
}

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 = !{!"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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass