; LLVM IR from kazunetakahashi/atcoder :: 2019/0810_ABC137/past/F.ll (Z6reduceRSt6vectorI4mintSaIS0_EE)

; 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.mint = type { i64 }

; 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 void @_Z6reduceRSt6vectorI4mintSaIS0_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca %class.mint, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %13, %1
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = call noundef zeroext i1 @_ZNKSt6vectorI4mintSaIS0_EE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  br i1 %6, label %11, label %7

7:                                                ; preds = %4
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4mintSaIS0_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24) %8) #3
  call void @_ZN4mintC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %3, i64 noundef 0)
  %10 = call noundef zeroext i1 @_ZNK4minteqERKS_(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef nonnull align 8 dereferenceable(8) %3)
  br label %11

11:                                               ; preds = %7, %4
  %12 = phi i1 [ false, %4 ], [ %10, %7 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br i1 %12, label %13, label %15

13:                                               ; preds = %11
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZNSt6vectorI4mintSaIS0_EE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #3
  br label %4, !llvm.loop !9

15:                                               ; preds = %11
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorI4mintSaIS0_EE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4mintSaIS0_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK4minteqERKS_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4mintC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorI4mintSaIS0_EE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) #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 = distinct !{!9, !10}
!10 = !{!"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.mint = type { i64 }

; 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 nounwind uwtable
define dso_local void @_Z6reduceRSt6vectorI4mintSaIS0_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #1 {
  %2 = alloca %class.mint, align 8
  %3 = tail call noundef zeroext i1 @_ZNKSt6vectorI4mintSaIS0_EE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #2
  br i1 %3, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %6
  %4 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4mintSaIS0_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  call void @_ZN4mintC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %2, i64 noundef 0)
  %5 = call noundef zeroext i1 @_ZNK4minteqERKS_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #2
  br i1 %5, label %6, label %.loopexit

6:                                                ; preds = %.lr.ph
  call void @_ZNSt6vectorI4mintSaIS0_EE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %7 = call noundef zeroext i1 @_ZNKSt6vectorI4mintSaIS0_EE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #2
  br i1 %7, label %.critedge, label %.lr.ph, !llvm.loop !5

.critedge:                                        ; preds = %6, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #2
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %.critedge
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorI4mintSaIS0_EE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorI4mintSaIS0_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK4minteqERKS_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4mintC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorI4mintSaIS0_EE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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