; LLVM IR from kazunetakahashi/atcoder :: 2020/0112_ABC151/past/F2.ll (Z1fee)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl" }
%"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl" = type { %"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl_data" }
%"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%struct.P = type { x86_fp80, x86_fp80 }

@N = external dso_local global i32, align 4
@p = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef x86_fp80 @_Z4dist1PS_(ptr noundef byval(%struct.P) align 16, ptr noundef byval(%struct.P) align 16) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local noundef x86_fp80 @_Z1fee(x86_fp80 noundef %0, x86_fp80 noundef %1) #0 {
  %3 = alloca x86_fp80, align 16
  %4 = alloca x86_fp80, align 16
  %5 = alloca x86_fp80, align 16
  %6 = alloca i32, align 4
  %7 = alloca %struct.P, align 16
  %8 = alloca %struct.P, align 16
  store x86_fp80 %0, ptr %3, align 16, !tbaa !5
  store x86_fp80 %1, ptr %4, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #4
  store x86_fp80 0xK00000000000000000000, ptr %5, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %23, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr @N, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %26

14:                                               ; preds = %9
  %15 = getelementptr inbounds %struct.P, ptr %7, i32 0, i32 0
  %16 = load x86_fp80, ptr %3, align 16, !tbaa !5
  store x86_fp80 %16, ptr %15, align 16, !tbaa !11
  %17 = getelementptr inbounds %struct.P, ptr %7, i32 0, i32 1
  %18 = load x86_fp80, ptr %4, align 16, !tbaa !5
  store x86_fp80 %18, ptr %17, align 16, !tbaa !13
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = call noundef nonnull align 16 dereferenceable(32) ptr @_ZNSt6vectorI1PSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @p, i64 noundef %20) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %8, ptr align 16 %21, i64 32, i1 false), !tbaa.struct !14
  %22 = call noundef x86_fp80 @_Z4dist1PS_(ptr noundef byval(%struct.P) align 16 %7, ptr noundef byval(%struct.P) align 16 %8)
  call void @_Z6ch_maxIeEvRT_S0_(ptr noundef nonnull align 16 dereferenceable(16) %5, x86_fp80 noundef %22)
  br label %23

23:                                               ; preds = %14
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !15

26:                                               ; preds = %13
  %27 = load x86_fp80, ptr %5, align 16, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #4
  ret x86_fp80 %27
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6ch_maxIeEvRT_S0_(ptr noundef nonnull align 16 dereferenceable(16), x86_fp80 noundef) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 16 dereferenceable(32) ptr @_ZNSt6vectorI1PSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 = !{!"long double", !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, !6, i64 0}
!12 = !{!"_ZTS1P", !6, i64 0, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = !{i64 0, i64 16, !5, i64 16, i64 16, !5}
!15 = distinct !{!15, !16}
!16 = !{!"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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl" }
%"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl" = type { %"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl_data" }
%"struct.std::_Vector_base<P, std::allocator<P>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%struct.P = type { x86_fp80, x86_fp80 }

@N = external dso_local local_unnamed_addr global i32, align 4
@p = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef x86_fp80 @_Z4dist1PS_(ptr noundef byval(%struct.P) align 16, ptr noundef byval(%struct.P) align 16) local_unnamed_addr #0

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

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

; Function Attrs: mustprogress uwtable
define dso_local noundef x86_fp80 @_Z1fee(x86_fp80 noundef %0, x86_fp80 noundef %1) local_unnamed_addr #0 {
  %3 = alloca x86_fp80, align 16
  %4 = alloca %struct.P, align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #3
  store x86_fp80 0xK00000000000000000000, ptr %3, align 16, !tbaa !5
  %5 = load i32, ptr @N, align 4, !tbaa !9
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %7 = getelementptr inbounds i8, ptr %4, i64 16
  br label %9

._crit_edge.loopexit:                             ; preds = %9
  %.pre = load x86_fp80, ptr %3, align 16, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %8 = phi x86_fp80 [ %.pre, %._crit_edge.loopexit ], [ 0xK00000000000000000000, %2 ]
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #3
  ret x86_fp80 %8

9:                                                ; preds = %.lr.ph, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %9 ]
  store x86_fp80 %0, ptr %4, align 16, !tbaa !11
  store x86_fp80 %1, ptr %7, align 16, !tbaa !13
  %10 = call noundef nonnull align 16 dereferenceable(32) ptr @_ZNSt6vectorI1PSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @p, i64 noundef %indvars.iv) #3
  %11 = call noundef x86_fp80 @_Z4dist1PS_(ptr noundef nonnull byval(%struct.P) align 16 %4, ptr noundef nonnull byval(%struct.P) align 16 %10)
  call void @_Z6ch_maxIeEvRT_S0_(ptr noundef nonnull align 16 dereferenceable(16) %3, x86_fp80 noundef %11)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = load i32, ptr @N, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = icmp slt i64 %indvars.iv.next, %13
  br i1 %14, label %9, label %._crit_edge.loopexit, !llvm.loop !14
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6ch_maxIeEvRT_S0_(ptr noundef nonnull align 16 dereferenceable(16), x86_fp80 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 16 dereferenceable(32) ptr @_ZNSt6vectorI1PSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long double", !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, !6, i64 0}
!12 = !{!"_ZTS1P", !6, i64 0, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,MemCpyOptPass,SROAPass,SimplifyCFGPass