; LLVM IR from forestLoop/Learning-ITMO-Academy-Pilot-Course :: two-pointers/3-I.ll (Z6removeR13KnapsackStackS0_)

; 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 uwtable
declare dso_local void @_ZN13KnapsackStack4PushEi(ptr noundef nonnull align 8 dereferenceable(160), i32 noundef) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6removeR13KnapsackStackS0_(ptr noundef nonnull align 8 dereferenceable(160) %0, ptr noundef nonnull align 8 dereferenceable(160) %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = call noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160) %5)
  br i1 %6, label %7, label %18

7:                                                ; preds = %2
  br label %8

8:                                                ; preds = %12, %7
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = call noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160) %9)
  %11 = xor i1 %10, true
  br i1 %11, label %12, label %17

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = call noundef i32 @_ZNK13KnapsackStack6TopValEv(ptr noundef nonnull align 8 dereferenceable(160) %14)
  call void @_ZN13KnapsackStack4PushEi(ptr noundef nonnull align 8 dereferenceable(160) %13, i32 noundef %15)
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160) %16)
  br label %8, !llvm.loop !9

17:                                               ; preds = %8
  br label %18

18:                                               ; preds = %17, %2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160) %19)
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNK13KnapsackStack6TopValEv(ptr noundef nonnull align 8 dereferenceable(160)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160)) #0 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" }

!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"

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13KnapsackStack4PushEi(ptr noundef nonnull align 8 dereferenceable(160), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6removeR13KnapsackStackS0_(ptr noundef nonnull align 8 dereferenceable(160) %0, ptr noundef nonnull align 8 dereferenceable(160) %1) local_unnamed_addr #0 {
  %3 = tail call noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160) %1)
  br i1 %3, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %2
  %4 = tail call noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160) %0)
  br i1 %4, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %5 = tail call noundef i32 @_ZNK13KnapsackStack6TopValEv(ptr noundef nonnull align 8 dereferenceable(160) %0)
  tail call void @_ZN13KnapsackStack4PushEi(ptr noundef nonnull align 8 dereferenceable(160) %1, i32 noundef %5)
  tail call void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160) %0)
  %6 = tail call noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160) %0)
  br i1 %6, label %.loopexit, label %.lr.ph, !llvm.loop !5

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %2
  tail call void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160) %1)
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK13KnapsackStack5EmptyEv(ptr noundef nonnull align 8 dereferenceable(160)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNK13KnapsackStack6TopValEv(ptr noundef nonnull align 8 dereferenceable(160)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN13KnapsackStack3PopEv(ptr noundef nonnull align 8 dereferenceable(160)) local_unnamed_addr #0 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" }

!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,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass