; LLVM IR from facebook/redex :: libredex/ControlFlow.ll (ZNK3cfg5Block15contains_opcodeE8IROpcode)

; 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.boost::intrusive::list_iterator.38" = type { %"struct.boost::intrusive::iiterator_members" }
%"struct.boost::intrusive::iiterator_members" = type { ptr }
%struct.MethodItemEntry = type { %"class.boost::intrusive::list_member_hook", i32, %union.anon.16 }
%"class.boost::intrusive::list_member_hook" = type { %"class.boost::intrusive::generic_hook" }
%"class.boost::intrusive::generic_hook" = type { %"struct.boost::intrusive::list_node" }
%"struct.boost::intrusive::list_node" = type { ptr, ptr }
%union.anon.16 = type { 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
declare dso_local void @_ZNK3cfg5Block5beginEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator.38") align 8, ptr noundef nonnull align 8 dereferenceable(104)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK3cfg5Block3endEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator.38") align 8, ptr noundef nonnull align 8 dereferenceable(104)) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEES9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i16 @_ZNK13IRInstruction6opcodeEv(ptr noundef nonnull align 8 dereferenceable(32)) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #4 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZNK3cfg5Block15contains_opcodeE8IROpcode(ptr noundef nonnull align 8 dereferenceable(104) %0, i16 noundef zeroext %1) #1 align 2 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i16, align 2
  %6 = alloca %"class.boost::intrusive::list_iterator.38", align 8
  %7 = alloca %"class.boost::intrusive::list_iterator.38", align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i16 %1, ptr %5, align 2, !tbaa !9
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  call void @_ZNK3cfg5Block5beginEv(ptr dead_on_unwind writable sret(%"class.boost::intrusive::list_iterator.38") align 8 %6, ptr noundef nonnull align 8 dereferenceable(104) %9)
  br label %10

10:                                               ; preds = %30, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  call void @_ZNK3cfg5Block3endEv(ptr dead_on_unwind writable sret(%"class.boost::intrusive::list_iterator.38") align 8 %7, ptr noundef nonnull align 8 dereferenceable(104) %9)
  %11 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br i1 %11, label %13, label %12

12:                                               ; preds = %10
  store i32 2, ptr %8, align 4
  br label %32

13:                                               ; preds = %10
  %14 = call noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  %15 = getelementptr inbounds %struct.MethodItemEntry, ptr %14, i32 0, i32 1
  %16 = load i32, ptr %15, align 8, !tbaa !11
  %17 = icmp ne i32 %16, 2
  br i1 %17, label %18, label %19

18:                                               ; preds = %13
  br label %30

19:                                               ; preds = %13
  %20 = call noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  %21 = getelementptr inbounds %struct.MethodItemEntry, ptr %20, i32 0, i32 2
  %22 = load ptr, ptr %21, align 8, !tbaa !17
  %23 = call noundef zeroext i16 @_ZNK13IRInstruction6opcodeEv(ptr noundef nonnull align 8 dereferenceable(32) %22)
  %24 = zext i16 %23 to i32
  %25 = load i16, ptr %5, align 2, !tbaa !9
  %26 = zext i16 %25 to i32
  %27 = icmp eq i32 %24, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %19
  store i1 true, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %32

29:                                               ; preds = %19
  br label %30

30:                                               ; preds = %29, %18
  %31 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  br label %10, !llvm.loop !18

32:                                               ; preds = %28, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  %33 = load i32, ptr %8, align 4
  switch i32 %33, label %37 [
    i32 2, label %34
    i32 1, label %35
  ]

34:                                               ; preds = %32
  store i1 false, ptr %3, align 1
  br label %35

35:                                               ; preds = %34, %32
  %36 = load i1, ptr %3, align 1
  ret i1 %36

37:                                               ; preds = %32
  unreachable
}

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 = { inlinehint 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 = { 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 #4 = { 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 #5 = { 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 = !{!"_ZTS8IROpcode", !7, i64 0}
!11 = !{!12, !16, i64 16}
!12 = !{!"_ZTS15MethodItemEntry", !13, i64 0, !16, i64 16, !7, i64 24}
!13 = !{!"_ZTSN5boost9intrusive16list_member_hookIJEEE", !14, i64 0}
!14 = !{!"_ZTSN5boost9intrusive12generic_hookILNS0_10algo_typesE0ENS0_16list_node_traitsIPvEENS0_10member_tagELNS0_14link_mode_typeE1ELNS0_14base_hook_typeE0EEE", !15, i64 0}
!15 = !{!"_ZTSN5boost9intrusive9list_nodeIPvEE", !6, i64 0, !6, i64 8}
!16 = !{!"_ZTS14MethodItemType", !7, i64 0}
!17 = !{!7, !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"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"

%"class.boost::intrusive::list_iterator.38" = type { %"struct.boost::intrusive::iiterator_members" }
%"struct.boost::intrusive::iiterator_members" = type { ptr }

; 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
declare dso_local void @_ZNK3cfg5Block5beginEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator.38") align 8, ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK3cfg5Block3endEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator.38") align 8, ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEES9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i16 @_ZNK13IRInstruction6opcodeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZNK3cfg5Block15contains_opcodeE8IROpcode(ptr noundef nonnull align 8 dereferenceable(104) %0, i16 noundef zeroext %1) local_unnamed_addr #1 align 2 {
  %3 = alloca %"class.boost::intrusive::list_iterator.38", align 8
  %4 = alloca %"class.boost::intrusive::list_iterator.38", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  call void @_ZNK3cfg5Block5beginEv(ptr dead_on_unwind nonnull writable sret(%"class.boost::intrusive::list_iterator.38") align 8 %3, ptr noundef nonnull align 8 dereferenceable(104) %0)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  call void @_ZNK3cfg5Block3endEv(ptr dead_on_unwind nonnull writable sret(%"class.boost::intrusive::list_iterator.38") align 8 %4, ptr noundef nonnull align 8 dereferenceable(104) %0)
  %5 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %15
  %6 = call noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %8 = load i32, ptr %7, align 8, !tbaa !5
  %.not = icmp eq i32 %8, 2
  br i1 %.not, label %9, label %15

9:                                                ; preds = %.lr.ph
  %10 = call noundef ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEptEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
  %11 = getelementptr inbounds i8, ptr %10, i64 24
  %12 = load ptr, ptr %11, align 8, !tbaa !14
  %13 = call noundef zeroext i16 @_ZNK13IRInstruction6opcodeEv(ptr noundef nonnull align 8 dereferenceable(32) %12)
  %14 = icmp eq i16 %13, %1
  br i1 %14, label %._crit_edge, label %15

15:                                               ; preds = %9, %.lr.ph
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  call void @_ZNK3cfg5Block3endEv(ptr dead_on_unwind nonnull writable sret(%"class.boost::intrusive::list_iterator.38") align 8 %4, ptr noundef nonnull align 8 dereferenceable(104) %0)
  %17 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb1EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  br i1 %17, label %.lr.ph, label %._crit_edge, !llvm.loop !15

._crit_edge:                                      ; preds = %15, %9, %2
  %.lcssa = phi i1 [ false, %2 ], [ true, %9 ], [ false, %15 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  ret i1 %.lcssa
}

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 = { inlinehint 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 = { 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 #4 = { 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 #5 = { 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, !13, i64 16}
!6 = !{!"_ZTS15MethodItemEntry", !7, i64 0, !13, i64 16, !11, i64 24}
!7 = !{!"_ZTSN5boost9intrusive16list_member_hookIJEEE", !8, i64 0}
!8 = !{!"_ZTSN5boost9intrusive12generic_hookILNS0_10algo_typesE0ENS0_16list_node_traitsIPvEENS0_10member_tagELNS0_14link_mode_typeE1ELNS0_14base_hook_typeE0EEE", !9, i64 0}
!9 = !{!"_ZTSN5boost9intrusive9list_nodeIPvEE", !10, i64 0, !10, i64 8}
!10 = !{!"any pointer", !11, i64 0}
!11 = !{!"omnipotent char", !12, i64 0}
!12 = !{!"Simple C++ TBAA"}
!13 = !{!"_ZTS14MethodItemType", !11, i64 0}
!14 = !{!11, !11, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass