; LLVM IR from Tudor67/Competitive-Programming :: Codeforces/#615#div3/F/F.ll (Z7get_maxPiRKiS1_S1_)

; 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"

%"struct.std::pair" = type { i32, i32 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local i64 @_Z7get_maxPiRKiS1_S1_(ptr noundef %0, ptr noundef nonnull align 4 dereferenceable(4) %1, ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3) #1 {
  %5 = alloca %"struct.std::pair", align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca %"struct.std::pair", align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 -1, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 -1, ptr %11, align 4, !tbaa !9
  %14 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %10, ptr noundef nonnull align 4 dereferenceable(4) %11)
  store i64 %14, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  store i32 1, ptr %12, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %48, %4
  %16 = load i32, ptr %12, align 4, !tbaa !9
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = icmp sle i32 %16, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %51

21:                                               ; preds = %15
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load i32, ptr %12, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = getelementptr inbounds %"struct.std::pair", ptr %5, i32 0, i32 0
  %28 = load i32, ptr %27, align 4, !tbaa !11
  %29 = icmp sgt i32 %26, %28
  br i1 %29, label %30, label %47

30:                                               ; preds = %21
  %31 = load i32, ptr %12, align 4, !tbaa !9
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = load i32, ptr %32, align 4, !tbaa !9
  %34 = icmp ne i32 %31, %33
  br i1 %34, label %35, label %47

35:                                               ; preds = %30
  %36 = load i32, ptr %12, align 4, !tbaa !9
  %37 = load ptr, ptr %9, align 8, !tbaa !5
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = icmp ne i32 %36, %38
  br i1 %39, label %40, label %47

40:                                               ; preds = %35
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #3
  %41 = load ptr, ptr %6, align 8, !tbaa !5
  %42 = load i32, ptr %12, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds i32, ptr %41, i64 %43
  %45 = call i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %44, ptr noundef nonnull align 4 dereferenceable(4) %12)
  store i64 %45, ptr %13, align 4
  %46 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %5, ptr noundef nonnull align 4 dereferenceable(8) %13) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #3
  br label %47

47:                                               ; preds = %40, %35, %30, %21
  br label %48

48:                                               ; preds = %47
  %49 = load i32, ptr %12, align 4, !tbaa !9
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %12, align 4, !tbaa !9
  br label %15, !llvm.loop !13

51:                                               ; preds = %20
  %52 = load i64, ptr %5, align 4
  ret i64 %52
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { 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 #3 = { 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 = !{!12, !10, i64 0}
!12 = !{!"_ZTSSt4pairIiiE", !10, i64 0, !10, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"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"

%"struct.std::pair" = type { i32, i32 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local i64 @_Z7get_maxPiRKiS1_S1_(ptr noundef %0, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %1, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %2, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %3) local_unnamed_addr #1 {
  %5 = alloca %"struct.std::pair", align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca %"struct.std::pair", align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #3
  store i32 -1, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  store i32 -1, ptr %7, align 4, !tbaa !5
  %10 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %7)
  store i64 %10, ptr %5, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %8) #3
  store i32 1, ptr %8, align 4, !tbaa !5
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %.not8 = icmp slt i32 %11, 1
  br i1 %.not8, label %._crit_edge, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %24
  %.pre11 = load i64, ptr %5, align 8
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %4
  %12 = phi i64 [ %.pre11, %._crit_edge.loopexit ], [ %10, %4 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %8) #3
  ret i64 %12

.lr.ph:                                           ; preds = %4, %24
  %13 = phi i32 [ %25, %24 ], [ %11, %4 ]
  %storemerge9 = phi i32 [ %27, %24 ], [ 1, %4 ]
  %14 = sext i32 %storemerge9 to i64
  %15 = getelementptr inbounds i32, ptr %0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 8, !tbaa !9
  %18 = icmp sle i32 %16, %17
  %19 = load i32, ptr %2, align 4
  %.not5 = icmp eq i32 %storemerge9, %19
  %or.cond = select i1 %18, i1 true, i1 %.not5
  %20 = load i32, ptr %3, align 4
  %.not6 = icmp eq i32 %storemerge9, %20
  %or.cond7 = select i1 %or.cond, i1 true, i1 %.not6
  br i1 %or.cond7, label %24, label %21

21:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #3
  %22 = call i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %15, ptr noundef nonnull align 4 dereferenceable(4) %8)
  store i64 %22, ptr %9, align 8
  %23 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %5, ptr noundef nonnull align 4 dereferenceable(8) %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #3
  %.pre = load i32, ptr %8, align 4, !tbaa !5
  %.pre10 = load i32, ptr %1, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %.lr.ph, %21
  %25 = phi i32 [ %13, %.lr.ph ], [ %.pre10, %21 ]
  %26 = phi i32 [ %storemerge9, %.lr.ph ], [ %.pre, %21 ]
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %8, align 4, !tbaa !5
  %.not.not = icmp slt i32 %26, %25
  br i1 %.not.not, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !11
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { 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 #3 = { 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, !6, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass