; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Searching Algorithms (binary_search)

; 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: nounwind uwtable
define dso_local i32 @binarySearch(ptr noundef %0, i32 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
  %10 = alloca i32, align 4
  %11 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = sub nsw i32 %12, 1
  store i32 %13, ptr %9, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %59, %3
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = icmp sle i32 %15, %16
  br i1 %17, label %18, label %60

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = add nsw i32 %19, %20
  %22 = sdiv i32 %21, 2
  store i32 %22, ptr %10, align 4, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = load i32, ptr %10, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i32, ptr %23, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = icmp sgt i32 %27, %28
  br i1 %29, label %30, label %33

30:                                               ; preds = %18
  %31 = load i32, ptr %10, align 4, !tbaa !9
  %32 = sub nsw i32 %31, 1
  store i32 %32, ptr %9, align 4, !tbaa !9
  br label %56

33:                                               ; preds = %18
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load i32, ptr %10, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = icmp slt i32 %38, %39
  br i1 %40, label %41, label %44

41:                                               ; preds = %33
  %42 = load i32, ptr %10, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %8, align 4, !tbaa !9
  br label %55

44:                                               ; preds = %33
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load i32, ptr %10, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %45, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = load i32, ptr %7, align 4, !tbaa !9
  %51 = icmp eq i32 %49, %50
  br i1 %51, label %52, label %54

52:                                               ; preds = %44
  %53 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %53, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %57

54:                                               ; preds = %44
  br label %55

55:                                               ; preds = %54, %41
  br label %56

56:                                               ; preds = %55, %30
  store i32 0, ptr %11, align 4
  br label %57

57:                                               ; preds = %56, %52
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %58 = load i32, ptr %11, align 4
  switch i32 %58, label %61 [
    i32 0, label %59
  ]

59:                                               ; preds = %57
  br label %14, !llvm.loop !11

60:                                               ; preds = %14
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %61

61:                                               ; preds = %60, %57
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %62 = load i32, ptr %4, align 4
  ret i32 %62
}

; 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 = { 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/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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local i32 @binarySearch(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not5962 = icmp slt i32 %1, 1
  br i1 %.not5962, label %.split, label %.outer29.split.lr.ph.preheader

.outer29.split.lr.ph.preheader:                   ; preds = %3
  %4 = add nsw i32 %1, -1
  br label %.outer29.split.lr.ph

.outer29.split.lr.ph:                             ; preds = %.outer29.split.lr.ph.preheader, %.outer29.split.split.split.us
  %.in = phi i32 [ %18, %.outer29.split.split.split.us ], [ %4, %.outer29.split.lr.ph.preheader ]
  %.019.ph64 = phi i32 [ %.019.ph3060.lcssa, %.outer29.split.split.split.us ], [ %4, %.outer29.split.lr.ph.preheader ]
  %.022.ph63 = phi i32 [ %17, %.outer29.split.split.split.us ], [ 0, %.outer29.split.lr.ph.preheader ]
  %5 = lshr i32 %.in, 1
  %.pn.pn85 = zext nneg i32 %5 to i64
  %6 = getelementptr inbounds i32, ptr %0, i64 %.pn.pn85
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.fr86 = freeze i32 %7
  %8 = icmp sgt i32 %.fr86, %2
  br i1 %8, label %.outer29.split.split.us, label %.outer29.split.split

.outer29.split:                                   ; preds = %.outer29.split.split.us
  %9 = add nsw i32 %15, -1
  %10 = add nuw nsw i32 %9, %.022.ph63
  %11 = lshr i32 %10, 1
  %.pn.pn = zext nneg i32 %11 to i64
  %12 = getelementptr inbounds i32, ptr %0, i64 %.pn.pn
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %.fr = freeze i32 %13
  %14 = icmp sgt i32 %.fr, %2
  br i1 %14, label %.outer29.split.split.us, label %.outer29.split.split, !llvm.loop !9

.outer29.split.split.us:                          ; preds = %.outer29.split.lr.ph, %.outer29.split
  %15 = phi i32 [ %11, %.outer29.split ], [ %5, %.outer29.split.lr.ph ]
  %.not.not = icmp slt i32 %.022.ph63, %15
  br i1 %.not.not, label %.outer29.split, label %.split, !llvm.loop !9

.outer29.split.split:                             ; preds = %.outer29.split, %.outer29.split.lr.ph
  %.019.ph3060.lcssa = phi i32 [ %.019.ph64, %.outer29.split.lr.ph ], [ %9, %.outer29.split ]
  %.lcssa = phi i32 [ %5, %.outer29.split.lr.ph ], [ %11, %.outer29.split ]
  %.fr.lcssa = phi i32 [ %.fr86, %.outer29.split.lr.ph ], [ %.fr, %.outer29.split ]
  %16 = icmp slt i32 %.fr.lcssa, %2
  br i1 %16, label %.outer29.split.split.split.us, label %.outer29.split.split.split

.outer29.split.split.split.us:                    ; preds = %.outer29.split.split
  %17 = add nuw nsw i32 %.lcssa, 1
  %.not59.not = icmp slt i32 %.lcssa, %.019.ph3060.lcssa
  %18 = add nuw nsw i32 %.019.ph3060.lcssa, %17
  br i1 %.not59.not, label %.outer29.split.lr.ph, label %.split, !llvm.loop !9

.outer29.split.split.split:                       ; preds = %.outer29.split.split
  %.not28.le.le = icmp eq i32 %.fr.lcssa, %2
  br i1 %.not28.le.le, label %.split, label %.outer29.split.split.split.split.split

.outer29.split.split.split.split.split:           ; preds = %.outer29.split.split.split, %.outer29.split.split.split.split.split
  br label %.outer29.split.split.split.split.split

.split:                                           ; preds = %.outer29.split.split.split.us, %.outer29.split.split.us, %3, %.outer29.split.split.split
  %.2.split = phi i32 [ %.lcssa, %.outer29.split.split.split ], [ -1, %3 ], [ -1, %.outer29.split.split.us ], [ -1, %.outer29.split.split.split.us ]
  ret i32 %.2.split
}

attributes #0 = { nofree norecurse nosync nounwind 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass