; LLVM IR from chensoft/libsocket :: src/core/reactor.ll (ZN4chen7reactor3runEv)

; 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::error_code" = type { i32, ptr }
%"class.std::error_condition" = type { i32, 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
define dso_local void @_ZN4chen7reactor3runEv(ptr noundef nonnull align 8 dereferenceable(264) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::error_code", align 8
  %4 = alloca %"class.std::error_condition", align 8
  %5 = alloca %"class.std::error_code", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #5
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #5
  br label %7

7:                                                ; preds = %11, %1
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #5
  call void @_ZNSt15error_conditionC2ISt4errcvEET_(ptr noundef nonnull align 8 dereferenceable(16) %4, i32 noundef 125) #5
  %8 = call noundef zeroext i1 @_ZStneRKSt10error_codeRKSt15error_condition(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 8 dereferenceable(16) %4) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #5
  br i1 %8, label %10, label %9

9:                                                ; preds = %7
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #5
  br label %17

10:                                               ; preds = %7
  br label %11

11:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #5
  %12 = call { i32, ptr } @_ZN4chen7reactor4pollEv(ptr noundef nonnull align 8 dereferenceable(264) %6)
  %13 = getelementptr inbounds { i32, ptr }, ptr %5, i32 0, i32 0
  %14 = extractvalue { i32, ptr } %12, 0
  store i32 %14, ptr %13, align 8
  %15 = getelementptr inbounds { i32, ptr }, ptr %5, i32 0, i32 1
  %16 = extractvalue { i32, ptr } %12, 1
  store ptr %16, ptr %15, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %3, ptr align 8 %5, i64 16, i1 false), !tbaa.struct !9
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #5
  br label %7, !llvm.loop !12

17:                                               ; preds = %9
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt10error_codeRKSt15error_condition(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15error_conditionC2ISt4errcvEET_(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { i32, ptr } @_ZN4chen7reactor4pollEv(ptr noundef nonnull align 8 dereferenceable(264)) #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #4

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 = { 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 #3 = { 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{i64 0, i64 4, !10, i64 8, i64 8, !5}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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.std::error_code" = type { i32, ptr }
%"class.std::error_condition" = type { i32, 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
define dso_local void @_ZN4chen7reactor3runEv(ptr noundef nonnull align 8 dereferenceable(264) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca %"class.std::error_code", align 8
  %3 = alloca %"class.std::error_condition", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #4
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %2) #4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #4
  call void @_ZNSt15error_conditionC2ISt4errcvEET_(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef 125) #4
  %4 = call noundef zeroext i1 @_ZStneRKSt10error_codeRKSt15error_condition(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 8 dereferenceable(16) %3) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #4
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %.sroa.41.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 8
  br label %5

._crit_edge:                                      ; preds = %5, %1
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #4
  ret void

5:                                                ; preds = %.lr.ph, %5
  %6 = call { i32, ptr } @_ZN4chen7reactor4pollEv(ptr noundef nonnull align 8 dereferenceable(264) %0)
  %7 = extractvalue { i32, ptr } %6, 0
  %8 = extractvalue { i32, ptr } %6, 1
  store i32 %7, ptr %2, align 8, !tbaa !5
  store ptr %8, ptr %.sroa.41.0..sroa_idx, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #4
  call void @_ZNSt15error_conditionC2ISt4errcvEET_(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef 125) #4
  %9 = call noundef zeroext i1 @_ZStneRKSt10error_codeRKSt15error_condition(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 8 dereferenceable(16) %3) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #4
  br i1 %9, label %5, label %._crit_edge, !llvm.loop !11
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt10error_codeRKSt15error_condition(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15error_conditionC2ISt4errcvEET_(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { i32, ptr } @_ZN4chen7reactor4pollEv(ptr noundef nonnull align 8 dereferenceable(264)) local_unnamed_addr #1 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 = { 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 #3 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass