; LLVM IR from kazunetakahashi/atcoder :: 2019/0204_TDPC/T.ll (Z6reduceRSt6vectorIxSaIxEE)

; 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 void @_Z6reduceRSt6vectorIxSaIxEE(ptr noundef nonnull align 8 dereferenceable(24) %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %14, %1
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = call noundef zeroext i1 @_ZNKSt6vectorIxSaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #1
  br i1 %5, label %12, label %6

6:                                                ; preds = %3
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEE4backEv(ptr noundef nonnull align 8 dereferenceable(24) %7) #1
  %9 = load i64, ptr %8, align 8, !tbaa !9
  %10 = srem i64 %9, 1000000007
  %11 = icmp eq i64 %10, 0
  br label %12

12:                                               ; preds = %6, %3
  %13 = phi i1 [ false, %3 ], [ %11, %6 ]
  br i1 %13, label %14, label %16

14:                                               ; preds = %12
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_ZNSt6vectorIxSaIxEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) %15) #1
  br label %3, !llvm.loop !11

16:                                               ; preds = %12
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorIxSaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !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 void @_Z6reduceRSt6vectorIxSaIxEE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #0 {
  %2 = tail call noundef zeroext i1 @_ZNKSt6vectorIxSaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  br i1 %2, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %7
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEE4backEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %5 = srem i64 %4, 1000000007
  %6 = icmp eq i64 %5, 0
  br i1 %6, label %7, label %.critedge

7:                                                ; preds = %.lr.ph
  tail call void @_ZNSt6vectorIxSaIxEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %8 = tail call noundef zeroext i1 @_ZNKSt6vectorIxSaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  br i1 %8, label %.critedge, label %.lr.ph, !llvm.loop !9

.critedge:                                        ; preds = %.lr.ph, %7, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt6vectorIxSaIxEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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