; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (2220)

; 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 @minBitFlips(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = icmp sgt i32 %8, %9
  br i1 %10, label %11, label %14

11:                                               ; preds = %2
  %12 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %12, ptr %6, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %13, ptr %7, align 4, !tbaa !5
  br label %17

14:                                               ; preds = %2
  %15 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %15, ptr %6, align 4, !tbaa !5
  %16 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %16, ptr %7, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %14, %11
  br label %18

18:                                               ; preds = %30, %17
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = icmp ne i32 %19, 0
  br i1 %20, label %21, label %35

21:                                               ; preds = %18
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = and i32 %22, 1
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = and i32 %24, 1
  %26 = icmp ne i32 %23, %25
  br i1 %26, label %27, label %30

27:                                               ; preds = %21
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %5, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %27, %21
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = ashr i32 %31, 1
  store i32 %32, ptr %7, align 4, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = ashr i32 %33, 1
  store i32 %34, ptr %6, align 4, !tbaa !5
  br label %18, !llvm.loop !9

35:                                               ; preds = %18
  br label %36

36:                                               ; preds = %46, %35
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = icmp ne i32 %37, 0
  br i1 %38, label %39, label %49

39:                                               ; preds = %36
  %40 = load i32, ptr %6, align 4, !tbaa !5
  %41 = and i32 %40, 1
  %42 = icmp ne i32 %41, 0
  br i1 %42, label %43, label %46

43:                                               ; preds = %39
  %44 = load i32, ptr %5, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %5, align 4, !tbaa !5
  br label %46

46:                                               ; preds = %43, %39
  %47 = load i32, ptr %6, align 4, !tbaa !5
  %48 = ashr i32 %47, 1
  store i32 %48, ptr %6, align 4, !tbaa !5
  br label %36, !llvm.loop !11

49:                                               ; preds = %36
  %50 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %50
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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(none) uwtable
define dso_local i32 @minBitFlips(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %. = tail call i32 @llvm.smax.i32(i32 %0, i32 %1)
  %.29 = tail call i32 @llvm.smin.i32(i32 %0, i32 %1)
  %.not31 = icmp eq i32 %.29, 0
  br i1 %.not31, label %.preheader, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %2
  %.019.lcssa = phi i32 [ 0, %2 ], [ %spec.select, %.lr.ph ]
  %.118.lcssa = phi i32 [ %., %2 ], [ %6, %.lr.ph ]
  %.not2636 = icmp eq i32 %.118.lcssa, 0
  br i1 %.not2636, label %._crit_edge, label %.lr.ph39

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.134 = phi i32 [ %5, %.lr.ph ], [ %.29, %2 ]
  %.11833 = phi i32 [ %6, %.lr.ph ], [ %., %2 ]
  %.01932 = phi i32 [ %spec.select, %.lr.ph ], [ 0, %2 ]
  %3 = xor i32 %.134, %.11833
  %4 = and i32 %3, 1
  %spec.select = add i32 %4, %.01932
  %5 = ashr i32 %.134, 1
  %6 = ashr i32 %.11833, 1
  %.not = icmp ult i32 %.134, 2
  br i1 %.not, label %.preheader, label %.lr.ph, !llvm.loop !5

.lr.ph39:                                         ; preds = %.preheader, %.lr.ph39
  %.238 = phi i32 [ %8, %.lr.ph39 ], [ %.118.lcssa, %.preheader ]
  %.22137 = phi i32 [ %spec.select30, %.lr.ph39 ], [ %.019.lcssa, %.preheader ]
  %7 = and i32 %.238, 1
  %spec.select30 = add i32 %7, %.22137
  %8 = ashr i32 %.238, 1
  %.not26 = icmp ult i32 %.238, 2
  br i1 %.not26, label %._crit_edge, label %.lr.ph39, !llvm.loop !7

._crit_edge:                                      ; preds = %.lr.ph39, %.preheader
  %.221.lcssa = phi i32 [ %.019.lcssa, %.preheader ], [ %spec.select30, %.lr.ph39 ]
  ret i32 %.221.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

attributes #0 = { nofree norecurse nosync nounwind memory(none) 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 speculatable willreturn memory(none) }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


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