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

; 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_process_table" = type { 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400)) #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
define dso_local noundef ptr @_ZN7sc_core16sc_process_table6removeEPNS_17sc_method_processE(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store ptr null, ptr %7, align 8, !tbaa !5
  %10 = getelementptr inbounds %"class.sc_core::sc_process_table", ptr %9, i32 0, i32 0
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  store ptr %11, ptr %6, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %33, %2
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %36

15:                                               ; preds = %12
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = icmp eq ptr %16, %17
  br i1 %18, label %19, label %32

19:                                               ; preds = %15
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %26

22:                                               ; preds = %19
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = call noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400) %24)
  call void @_ZN7sc_core17sc_method_process14set_next_existEPS0_(ptr noundef nonnull align 8 dereferenceable(400) %23, ptr noundef %25)
  br label %30

26:                                               ; preds = %19
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = call noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400) %27)
  %29 = getelementptr inbounds %"class.sc_core::sc_process_table", ptr %9, i32 0, i32 0
  store ptr %28, ptr %29, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %26, %22
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %31, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %37

32:                                               ; preds = %15
  br label %33

33:                                               ; preds = %32
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = call noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400) %34)
  store ptr %35, ptr %6, align 8, !tbaa !5
  br label %12, !llvm.loop !11

36:                                               ; preds = %12
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %37

37:                                               ; preds = %36, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %38 = load ptr, ptr %3, align 8
  ret ptr %38
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN7sc_core17sc_method_process14set_next_existEPS0_(ptr noundef nonnull align 8 dereferenceable(400), ptr noundef) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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_core16sc_process_tableE", !6, i64 0, !6, i64 8}
!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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN7sc_core16sc_process_table6removeEPNS_17sc_method_processE(ptr nocapture noundef nonnull align 8 dereferenceable(16) %0, ptr noundef readnone %1) local_unnamed_addr #1 align 2 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not14 = icmp eq ptr %3, null
  br i1 %.not14, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %2, %7
  %.01115 = phi ptr [ %5, %7 ], [ %3, %2 ]
  %4 = icmp eq ptr %.01115, %1
  %5 = tail call noundef ptr @_ZN7sc_core17sc_method_process10next_existEv(ptr noundef nonnull align 8 dereferenceable(400) %.01115)
  br i1 %4, label %6, label %7

6:                                                ; preds = %.lr.ph
  store ptr %5, ptr %0, align 8, !tbaa !5
  br label %.loopexit

7:                                                ; preds = %.lr.ph
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !10

.loopexit:                                        ; preds = %7, %2, %6
  %.0 = phi ptr [ %1, %6 ], [ null, %2 ], [ null, %7 ]
  ret ptr %.0
}

attributes #0 = { inlinehint 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 = { 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_core16sc_process_tableE", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass