; LLVM IR from facebook/redex :: opt/nopper/Nopper.ll (ZN11nopper_impl19get_noppable_blocksERN3cfg16ControlFlowGraphE)

; 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.std::vector.88" = type { %"struct.std::_Vector_base.89" }
%"struct.std::_Vector_base.89" = type { %"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl" }
%"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl" = type { %"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.anon.106 = type { ptr }

declare i32 @__gxx_personality_v0(...)

; 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 @_ZN11nopper_impl19get_noppable_blocksERN3cfg16ControlFlowGraphE(ptr dead_on_unwind noalias writable sret(%"class.std::vector.88") align 8 %0, ptr noundef nonnull align 8 dereferenceable(160) %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i1, align 1
  %6 = alloca %class.anon.106, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZNK3cfg16ControlFlowGraph6blocksEv(ptr dead_on_unwind writable sret(%"class.std::vector.88") align 8 %0, ptr noundef nonnull align 8 dereferenceable(160) %9)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %10 = getelementptr inbounds %class.anon.106, ptr %6, i32 0, i32 0
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %11, ptr %10, align 8, !tbaa !5
  %12 = invoke noundef i64 @"_ZN5std208erase_ifIPN3cfg5BlockEZN11nopper_impl19get_noppable_blocksERNS1_16ControlFlowGraphEE3$_0EEmRSt6vectorIT_SaIS9_EERKT0_"(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %6)
          to label %13 unwind label %15

13:                                               ; preds = %2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  store i1 true, ptr %5, align 1
  %14 = load i1, ptr %5, align 1
  br i1 %14, label %20, label %19

15:                                               ; preds = %2
  %16 = landingpad { ptr, i32 }
          cleanup
  %17 = extractvalue { ptr, i32 } %16, 0
  store ptr %17, ptr %7, align 8
  %18 = extractvalue { ptr, i32 } %16, 1
  store i32 %18, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @_ZNSt6vectorIPN3cfg5BlockESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %21

19:                                               ; preds = %13
  call void @_ZNSt6vectorIPN3cfg5BlockESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %20

20:                                               ; preds = %19, %13
  ret void

21:                                               ; preds = %15
  %22 = load ptr, ptr %7, align 8
  %23 = load i32, ptr %8, align 4
  %24 = insertvalue { ptr, i32 } poison, ptr %22, 0
  %25 = insertvalue { ptr, i32 } %24, i32 %23, 1
  resume { ptr, i32 } %25
}

declare void @_ZNK3cfg16ControlFlowGraph6blocksEv(ptr dead_on_unwind writable sret(%"class.std::vector.88") align 8, ptr noundef nonnull align 8 dereferenceable(160)) #2

; Function Attrs: mustprogress uwtable
declare hidden noundef i64 @"_ZN5std208erase_ifIPN3cfg5BlockEZN11nopper_impl19get_noppable_blocksERNS1_16ControlFlowGraphEE3$_0EEmRSt6vectorIT_SaIS9_EERKT0_"(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN3cfg5BlockESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #3 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 = { "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 = { 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"}


; 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.std::vector.88" = type { %"struct.std::_Vector_base.89" }
%"struct.std::_Vector_base.89" = type { %"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl" }
%"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl" = type { %"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<cfg::Block *, std::allocator<cfg::Block *>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.anon.106 = type { ptr }

declare i32 @__gxx_personality_v0(...)

; 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 @_ZN11nopper_impl19get_noppable_blocksERN3cfg16ControlFlowGraphE(ptr dead_on_unwind noalias writable sret(%"class.std::vector.88") align 8 %0, ptr noundef nonnull align 8 dereferenceable(160) %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca %class.anon.106, align 8
  tail call void @_ZNK3cfg16ControlFlowGraph6blocksEv(ptr dead_on_unwind writable sret(%"class.std::vector.88") align 8 %0, ptr noundef nonnull align 8 dereferenceable(160) %1)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  store ptr %1, ptr %3, align 8, !tbaa !5
  %4 = invoke noundef i64 @"_ZN5std208erase_ifIPN3cfg5BlockEZN11nopper_impl19get_noppable_blocksERNS1_16ControlFlowGraphEE3$_0EEmRSt6vectorIT_SaIS9_EERKT0_"(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %5 unwind label %6

5:                                                ; preds = %2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  ret void

6:                                                ; preds = %2
  %7 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @_ZNSt6vectorIPN3cfg5BlockESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  resume { ptr, i32 } %7
}

declare void @_ZNK3cfg16ControlFlowGraph6blocksEv(ptr dead_on_unwind writable sret(%"class.std::vector.88") align 8, ptr noundef nonnull align 8 dereferenceable(160)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare hidden noundef i64 @"_ZN5std208erase_ifIPN3cfg5BlockEZN11nopper_impl19get_noppable_blocksERNS1_16ControlFlowGraphEE3$_0EEmRSt6vectorIT_SaIS9_EERKT0_"(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN3cfg5BlockESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #3 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 = { "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 = { 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"}


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