; LLVM IR from upupming/algorithm :: wheel/binarySearch.ll (Z22binarySearchLowerBoundPiiii)

; 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 nounwind uwtable
define dso_local noundef i32 @_Z22binarySearchLowerBoundPiiii(ptr noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #1 {
  %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
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr %9, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %36, %4
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = load i32, ptr %7, align 4, !tbaa !9
  %16 = icmp sle i32 %14, %15
  br i1 %16, label %17, label %37

17:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = add nsw i32 %18, %19
  %21 = sdiv i32 %20, 2
  store i32 %21, ptr %10, align 4, !tbaa !9
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %10, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %29, label %32

29:                                               ; preds = %17
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %6, align 4, !tbaa !9
  br label %36

32:                                               ; preds = %17
  %33 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %33, ptr %9, align 4, !tbaa !9
  %34 = load i32, ptr %10, align 4, !tbaa !9
  %35 = sub nsw i32 %34, 1
  store i32 %35, ptr %7, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %32, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %13, !llvm.loop !11

37:                                               ; preds = %13
  %38 = load i32, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret i32 %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z22binarySearchLowerBoundPiiii(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = add nsw i32 %2, 1
  %.not15 = icmp sgt i32 %1, %2
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.018 = phi i32 [ %.1, %.lr.ph ], [ %1, %4 ]
  %.01117 = phi i32 [ %.112, %.lr.ph ], [ %5, %4 ]
  %.01316 = phi i32 [ %.114, %.lr.ph ], [ %2, %4 ]
  %6 = add nsw i32 %.018, %.01316
  %7 = sdiv i32 %6, 2
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds i32, ptr %0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp slt i32 %10, %3
  %12 = add nsw i32 %7, 1
  %13 = add nsw i32 %7, -1
  %.114 = select i1 %11, i32 %.01316, i32 %13
  %.112 = select i1 %11, i32 %.01117, i32 %7
  %.1 = select i1 %11, i32 %12, i32 %.018
  %.not = icmp sgt i32 %.1, %.114
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.011.lcssa = phi i32 [ %5, %4 ], [ %.112, %.lr.ph ]
  ret i32 %.011.lcssa
}

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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass