; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/kernel (sc_event)

; 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.sc_core::sc_event_list" = type { %"class.std::vector.31", i8, i8, i32 }
%"class.std::vector.31" = type { %"struct.std::_Vector_base.32" }
%"struct.std::_Vector_base.32" = type { %"struct.std::_Vector_base<const sc_core::sc_event *, std::allocator<const sc_core::sc_event *>>::_Vector_impl" }
%"struct.std::_Vector_base<const sc_core::sc_event *, std::allocator<const sc_core::sc_event *>>::_Vector_impl" = type { %"struct.std::_Vector_base<const sc_core::sc_event *, std::allocator<const sc_core::sc_event *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<const sc_core::sc_event *, std::allocator<const sc_core::sc_event *>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; 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 @_ZN7sc_core13sc_event_list9push_backERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(160) %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %9 = load ptr, ptr %3, align 8
  %10 = getelementptr inbounds %"class.sc_core::sc_event_list", ptr %9, i32 0, i32 0
  %11 = call noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #3
  %12 = icmp ne i64 %11, 0
  br i1 %12, label %13, label %43

13:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %14 = getelementptr inbounds %"class.sc_core::sc_event_list", ptr %9, i32 0, i32 0
  %15 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %14, i64 noundef 0) #3
  store ptr %15, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %16 = getelementptr inbounds %"class.sc_core::sc_event_list", ptr %9, i32 0, i32 0
  %17 = call noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #3
  %18 = sub i64 %17, 1
  %19 = trunc i64 %18 to i32
  store i32 %19, ptr %6, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %34, %13
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp sge i32 %21, 0
  br i1 %22, label %24, label %23

23:                                               ; preds = %20
  store i32 2, ptr %7, align 4
  br label %37

24:                                               ; preds = %20
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds ptr, ptr %26, i64 %28
  %30 = load ptr, ptr %29, align 8, !tbaa !5
  %31 = icmp eq ptr %25, %30
  br i1 %31, label %32, label %33

32:                                               ; preds = %24
  store i32 1, ptr %7, align 4
  br label %37

33:                                               ; preds = %24
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = add nsw i32 %35, -1
  store i32 %36, ptr %6, align 4, !tbaa !9
  br label %20, !llvm.loop !11

37:                                               ; preds = %32, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %38 = load i32, ptr %7, align 4
  switch i32 %38, label %40 [
    i32 2, label %39
  ]

39:                                               ; preds = %37
  store i32 0, ptr %7, align 4
  br label %40

40:                                               ; preds = %39, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %41 = load i32, ptr %7, align 4
  switch i32 %41, label %47 [
    i32 0, label %42
    i32 1, label %46
  ]

42:                                               ; preds = %40
  br label %43

43:                                               ; preds = %42, %2
  %44 = getelementptr inbounds %"class.sc_core::sc_event_list", ptr %9, i32 0, i32 0
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %45, ptr %8, align 8, !tbaa !5
  call void @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EE9push_backEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %44, ptr noundef nonnull align 8 dereferenceable(8) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %46

46:                                               ; preds = %43, %40
  ret void

47:                                               ; preds = %40
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(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 @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EE9push_backEOS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #1 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 = 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 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 void @_ZN7sc_core13sc_event_list9push_backERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(160) %1) local_unnamed_addr #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = tail call noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %.thread, label %5

5:                                                ; preds = %2
  %6 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef 0) #3
  %7 = tail call noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  %8 = and i64 %7, 4294967295
  br label %9

9:                                                ; preds = %12, %5
  %indvars.iv = phi i64 [ %indvars.iv.next, %12 ], [ %8, %5 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %10 = and i64 %indvars.iv.next, 2147483648
  %11 = icmp eq i64 %10, 0
  br i1 %11, label %12, label %.thread

12:                                               ; preds = %9
  %13 = and i64 %indvars.iv.next, 2147483647
  %14 = getelementptr inbounds ptr, ptr %6, i64 %13
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  %16 = icmp eq ptr %15, %1
  br i1 %16, label %.loopexit, label %9, !llvm.loop !9

.thread:                                          ; preds = %9, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store ptr %1, ptr %3, align 8, !tbaa !5
  call void @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EE9push_backEOS3_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %.loopexit

.loopexit:                                        ; preds = %12, %.thread
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIPKN7sc_core8sc_eventESaIS3_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIPKN7sc_core8sc_eventESaIS3_EE9push_backEOS3_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass