; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/utils/sc_list.ll (ZN7sc_core13sc_plist_base10push_frontEPv)

; 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_plist_base" = type { ptr, ptr }
%"class.sc_core::sc_plist_elem" = 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: mustprogress nounwind uwtable
declare dso_local void @_ZN7sc_core13sc_plist_elemdlEPvm(ptr noundef, i64 noundef) #1 align 2

; 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
declare dso_local noundef ptr @_ZN7sc_core13sc_plist_elemnwEm(i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7sc_core13sc_plist_elemC2EPvPS0_S2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef, ptr noundef, ptr noundef) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN7sc_core13sc_plist_base10push_frontEPv(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) #2 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %9 = call noundef ptr @_ZN7sc_core13sc_plist_elemnwEm(i64 noundef 24)
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !9
  invoke void @_ZN7sc_core13sc_plist_elemC2EPvPS0_S2_(ptr noundef nonnull align 8 dereferenceable(24) %9, ptr noundef %10, ptr noundef null, ptr noundef %12)
          to label %13 unwind label %24

13:                                               ; preds = %2
  store ptr %9, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %28

17:                                               ; preds = %13
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !9
  %21 = getelementptr inbounds %"class.sc_core::sc_plist_elem", ptr %20, i32 0, i32 1
  store ptr %18, ptr %21, align 8, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 0
  store ptr %22, ptr %23, align 8, !tbaa !9
  br label %32

24:                                               ; preds = %2
  %25 = landingpad { ptr, i32 }
          cleanup
  %26 = extractvalue { ptr, i32 } %25, 0
  store ptr %26, ptr %6, align 8
  %27 = extractvalue { ptr, i32 } %25, 1
  store i32 %27, ptr %7, align 4
  call void @_ZN7sc_core13sc_plist_elemdlEPvm(ptr noundef %9, i64 noundef 24) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %34

28:                                               ; preds = %13
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 1
  store ptr %29, ptr %30, align 8, !tbaa !13
  %31 = getelementptr inbounds %"class.sc_core::sc_plist_base", ptr %8, i32 0, i32 0
  store ptr %29, ptr %31, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %28, %17
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %33

34:                                               ; preds = %24
  %35 = load ptr, ptr %6, align 8
  %36 = load i32, ptr %7, align 4
  %37 = insertvalue { ptr, i32 } poison, ptr %35, 0
  %38 = insertvalue { ptr, i32 } %37, i32 %36, 1
  resume { ptr, i32 } %38
}

attributes #0 = { 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 = { 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 #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, !6, i64 0}
!10 = !{!"_ZTSN7sc_core13sc_plist_baseE", !6, i64 0, !6, i64 8}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTSN7sc_core13sc_plist_elemE", !6, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!10, !6, i64 8}


; 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 noundef ptr @_ZN7sc_core13sc_plist_elemnwEm(i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7sc_core13sc_plist_elemC2EPvPS0_S2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef, ptr noundef, ptr noundef) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN7sc_core13sc_plist_base10push_frontEPv(ptr nocapture noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = tail call noundef ptr @_ZN7sc_core13sc_plist_elemnwEm(i64 noundef 24)
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  tail call void @_ZN7sc_core13sc_plist_elemC2EPvPS0_S2_(ptr noundef nonnull align 8 dereferenceable(24) %3, ptr noundef %1, ptr noundef null, ptr noundef %4)
  %5 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %5, null
  %. = select i1 %.not, ptr %0, ptr %5
  %6 = getelementptr inbounds i8, ptr %., i64 8
  store ptr %3, ptr %6, align 8, !tbaa !10
  store ptr %3, ptr %0, align 8, !tbaa !5
  ret ptr %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 = { 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" }

!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, !7, i64 0}
!6 = !{!"_ZTSN7sc_core13sc_plist_baseE", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass