; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 06. Sorting/binary_search.ll (Z10bin_searchPiii)

; 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 @_Z10bin_searchPiii(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
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %14 = load i32, ptr %8, align 4, !tbaa !9
  %15 = load i32, ptr %9, align 4, !tbaa !9
  %16 = load i32, ptr %8, align 4, !tbaa !9
  %17 = sub nsw i32 %15, %16
  %18 = sdiv i32 %17, 2
  %19 = add nsw i32 %14, %18
  store i32 %19, ptr %10, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %48, %3
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = load i32, ptr %9, align 4, !tbaa !9
  %23 = icmp sle i32 %21, %22
  br i1 %23, label %24, label %55

24:                                               ; preds = %20
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = icmp eq i32 %29, %30
  br i1 %31, label %32, label %34

32:                                               ; preds = %24
  %33 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %33, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %56

34:                                               ; preds = %24
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !9
  %41 = icmp sgt i32 %35, %40
  br i1 %41, label %42, label %45

42:                                               ; preds = %34
  %43 = load i32, ptr %10, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %8, align 4, !tbaa !9
  br label %48

45:                                               ; preds = %34
  %46 = load i32, ptr %10, align 4, !tbaa !9
  %47 = sub nsw i32 %46, 1
  store i32 %47, ptr %9, align 4, !tbaa !9
  br label %48

48:                                               ; preds = %45, %42
  %49 = load i32, ptr %8, align 4, !tbaa !9
  %50 = load i32, ptr %9, align 4, !tbaa !9
  %51 = load i32, ptr %8, align 4, !tbaa !9
  %52 = sub nsw i32 %50, %51
  %53 = sdiv i32 %52, 2
  %54 = add nsw i32 %49, %53
  store i32 %54, ptr %10, align 4, !tbaa !9
  br label %20, !llvm.loop !11

55:                                               ; preds = %20
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %56

56:                                               ; preds = %55, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %57 = load i32, ptr %4, align 4
  ret i32 %57
}

; 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 = !{!"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 i32 @_Z10bin_searchPiii(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not24 = icmp slt i32 %1, 1
  br i1 %.not24, label %._crit_edge, label %.lr.ph.preheader

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

.lr.ph:                                           ; preds = %.lr.ph.preheader, %10
  %.027 = phi i32 [ %16, %10 ], [ %5, %.lr.ph.preheader ]
  %.01826 = phi i32 [ %.1, %10 ], [ %4, %.lr.ph.preheader ]
  %.01925 = phi i32 [ %.120, %10 ], [ 0, %.lr.ph.preheader ]
  %6 = sext i32 %.027 to i64
  %7 = getelementptr inbounds i32, ptr %0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp eq i32 %8, %2
  br i1 %9, label %._crit_edge, label %10

10:                                               ; preds = %.lr.ph
  %11 = icmp slt i32 %8, %2
  %12 = add nsw i32 %.027, 1
  %13 = add nsw i32 %.027, -1
  %.120 = select i1 %11, i32 %12, i32 %.01925
  %.1 = select i1 %11, i32 %.01826, i32 %13
  %14 = sub nsw i32 %.1, %.120
  %15 = sdiv i32 %14, 2
  %16 = add nsw i32 %15, %.120
  %.not = icmp sgt i32 %.120, %.1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %10, %3
  %.021 = phi i32 [ -1, %3 ], [ -1, %10 ], [ %.027, %.lr.ph ]
  ret i32 %.021
}

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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass