; LLVM IR from Mohammed-Shoaib/Coding-Problems :: Google/Kick Start/2020/Round D/D.ll (Z12locked_doorsiiiRSt6vectorIiSaIiEE)

; 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 @_Z12locked_doorsiiiRSt6vectorIiSaIiEE(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr noundef nonnull align 8 dereferenceable(24) %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %11 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %11, ptr %10, align 4, !tbaa !5
  store i32 %11, ptr %9, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %34, %4
  %13 = load i32, ptr %7, align 4, !tbaa !5
  %14 = add nsw i32 %13, -1
  store i32 %14, ptr %7, align 4, !tbaa !5
  %15 = icmp ne i32 %13, 0
  br i1 %15, label %16, label %35

16:                                               ; preds = %12
  %17 = load ptr, ptr %8, align 8, !tbaa !9
  %18 = load i32, ptr %9, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %17, i64 noundef %19) #2
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = load ptr, ptr %8, align 8, !tbaa !9
  %23 = load i32, ptr %10, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %22, i64 noundef %24) #2
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = icmp sgt i32 %21, %26
  br i1 %27, label %28, label %31

28:                                               ; preds = %16
  %29 = load i32, ptr %10, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %10, align 4, !tbaa !5
  store i32 %30, ptr %6, align 4, !tbaa !5
  br label %34

31:                                               ; preds = %16
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = add nsw i32 %32, -1
  store i32 %33, ptr %9, align 4, !tbaa !5
  store i32 %32, ptr %6, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %31, %28
  br label %12, !llvm.loop !11

35:                                               ; preds = %12
  %36 = load i32, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret i32 %36
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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 nounwind uwtable
define dso_local noundef i32 @_Z12locked_doorsiiiRSt6vectorIiSaIiEE(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr noundef nonnull align 8 dereferenceable(24) %3) local_unnamed_addr #0 {
  %.not13 = icmp eq i32 %2, 0
  br i1 %.not13, label %15, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.016 = phi i32 [ %.1, %.lr.ph ], [ %1, %4 ]
  %.0815 = phi i32 [ %.19, %.lr.ph ], [ %1, %4 ]
  %.01214 = phi i32 [ %5, %.lr.ph ], [ %2, %4 ]
  %5 = add nsw i32 %.01214, -1
  %6 = sext i32 %.0815 to i64
  %7 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %6) #1
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sext i32 %.016 to i64
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %9) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sle i32 %8, %11
  %13 = add nsw i32 %.016, 1
  %14 = sext i1 %12 to i32
  %.19 = add nsw i32 %.0815, %14
  %.1 = select i1 %12, i32 %.016, i32 %13
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %.111.le = select i1 %12, i32 %.0815, i32 %13
  br label %15

15:                                               ; preds = %._crit_edge, %4
  %.010.lcssa = phi i32 [ %.111.le, %._crit_edge ], [ %1, %4 ]
  ret i32 %.010.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = { 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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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