; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1518)

; 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 @numWaterBottles(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
  %8 = 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
  %9 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %9, ptr %5, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %30, %2
  br label %11

11:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sdiv i32 %12, %13
  store i32 %14, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  store i32 %17, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %21

20:                                               ; preds = %11
  store i32 3, ptr %8, align 4
  br label %28

21:                                               ; preds = %11
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = add nsw i32 %23, %22
  store i32 %24, ptr %5, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = add nsw i32 %25, %26
  store i32 %27, ptr %3, align 4, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %28

28:                                               ; preds = %21, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %29 = load i32, ptr %8, align 4
  switch i32 %29, label %33 [
    i32 0, label %30
    i32 3, label %31
  ]

30:                                               ; preds = %28
  br label %10

31:                                               ; preds = %28
  %32 = load i32, ptr %5, align 4, !tbaa !5
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %32

33:                                               ; preds = %28
  unreachable
}

; 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"}


; 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 @numWaterBottles(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sdiv i32 %0, %1
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %5 = phi i32 [ %9, %.lr.ph ], [ %3, %2 ]
  %.01222 = phi i32 [ %8, %.lr.ph ], [ %0, %2 ]
  %.01321 = phi i32 [ %7, %.lr.ph ], [ %0, %2 ]
  %6 = srem i32 %.01222, %1
  %7 = add nsw i32 %5, %.01321
  %8 = add nsw i32 %6, %5
  %9 = sdiv i32 %8, %1
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.013.lcssa = phi i32 [ %0, %2 ], [ %7, %.lr.ph ]
  ret i32 %.013.lcssa
}

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" }

!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)"}


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