; LLVM IR from achilles288/robot-monitor-graphics :: src/base/context_container.ll (ZN3rmg11ContextList8iteratorppEi)

; 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.rmg::ContextList::iterator" = type { ptr, ptr }
%"struct.rmg::LinkedList<rmg::Context>::Node" = type { ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local { ptr, ptr } @_ZN3rmg11ContextList8iteratorppEi(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) #0 align 2 {
  %3 = alloca %"class.rmg::ContextList::iterator", align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8
  %7 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 1
  %10 = load ptr, ptr %9, align 8, !tbaa !13
  call void @_ZN3rmg11ContextList8iteratorC1EPNS_10LinkedListINS_7ContextEE4NodeEPS3_(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef %8, ptr noundef %10)
  %11 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %25

14:                                               ; preds = %2
  %15 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  %17 = getelementptr inbounds %"struct.rmg::LinkedList<rmg::Context>::Node", ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 1
  store ptr %18, ptr %19, align 8, !tbaa !13
  %20 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !11
  %22 = getelementptr inbounds %"struct.rmg::LinkedList<rmg::Context>::Node", ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !16
  %24 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 0
  store ptr %23, ptr %24, align 8, !tbaa !11
  br label %27

25:                                               ; preds = %2
  %26 = getelementptr inbounds %"class.rmg::ContextList::iterator", ptr %6, i32 0, i32 1
  store ptr null, ptr %26, align 8, !tbaa !13
  br label %27

27:                                               ; preds = %25, %14
  %28 = load { ptr, ptr }, ptr %3, align 8
  ret { ptr, ptr } %28
}

declare void @_ZN3rmg11ContextList8iteratorC1EPNS_10LinkedListINS_7ContextEE4NodeEPS3_(ptr, ptr, ptr)

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSN3rmg11ContextList8iteratorE", !6, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !6, i64 8}
!15 = !{!"_ZTSN3rmg10LinkedListINS_7ContextEE4NodeE", !6, i64 0, !6, i64 8}
!16 = !{!15, !6, i64 0}


; 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"

%"class.rmg::ContextList::iterator" = type { ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local { ptr, ptr } @_ZN3rmg11ContextList8iteratorppEi(ptr nocapture noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = alloca %"class.rmg::ContextList::iterator", align 8
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !10
  call void @_ZN3rmg11ContextList8iteratorC1EPNS_10LinkedListINS_7ContextEE4NodeEPS3_(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef %4, ptr noundef %6)
  %7 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %12, label %8

8:                                                ; preds = %2
  %9 = getelementptr inbounds i8, ptr %7, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = load ptr, ptr %7, align 8, !tbaa !13
  store ptr %11, ptr %0, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %2, %8
  %.sink = phi ptr [ %10, %8 ], [ null, %2 ]
  store ptr %.sink, ptr %5, align 8
  %.fca.0.load = load ptr, ptr %3, align 8
  %.fca.0.insert = insertvalue { ptr, ptr } poison, ptr %.fca.0.load, 0
  %.fca.1.gep = getelementptr inbounds i8, ptr %3, i64 8
  %.fca.1.load = load ptr, ptr %.fca.1.gep, align 8
  %.fca.1.insert = insertvalue { ptr, ptr } %.fca.0.insert, ptr %.fca.1.load, 1
  ret { ptr, ptr } %.fca.1.insert
}

declare void @_ZN3rmg11ContextList8iteratorC1EPNS_10LinkedListINS_7ContextEE4NodeEPS3_(ptr, ptr, ptr) local_unnamed_addr

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, !7, i64 0}
!6 = !{!"_ZTSN3rmg11ContextList8iteratorE", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{!12, !7, i64 8}
!12 = !{!"_ZTSN3rmg10LinkedListINS_7ContextEE4NodeE", !7, i64 0, !7, i64 8}
!13 = !{!12, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SROAPass