; LLVM IR from chensoft/libsocket :: src/core/ioctl.unix.ll (ZN4chen5ioctl11nonblockingEib)

; 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 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare { i32, ptr } @_ZN4chen3sys5errorEv() #1

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind
declare i32 @ioctl(i32 noundef, i64 noundef, ...) #3

; Function Attrs: mustprogress uwtable
define dso_local { i32, ptr } @_ZN4chen5ioctl11nonblockingEib(i32 noundef %0, i1 noundef zeroext %1) #4 align 2 {
  %3 = alloca %"class.std::error_code", align 8
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  %7 = zext i1 %1 to i8
  store i8 %7, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  %8 = load i8, ptr %5, align 1, !tbaa !9, !range !11, !noundef !12
  %9 = trunc i8 %8 to i1
  %10 = zext i1 %9 to i64
  %11 = select i1 %9, i32 1, i32 0
  store i32 %11, ptr %6, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = call i32 (i32, i64, ...) @ioctl(i32 noundef %12, i64 noundef 21537, ptr noundef %6) #5
  %14 = icmp slt i32 %13, 0
  br i1 %14, label %15, label %21

15:                                               ; preds = %2
  %16 = call { i32, ptr } @_ZN4chen3sys5errorEv()
  %17 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 0
  %18 = extractvalue { i32, ptr } %16, 0
  store i32 %18, ptr %17, align 8
  %19 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 1
  %20 = extractvalue { i32, ptr } %16, 1
  store ptr %20, ptr %19, align 8
  br label %22

21:                                               ; preds = %2
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #5
  br label %22

22:                                               ; preds = %21, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  %23 = load { i32, ptr }, ptr %3, align 8
  ret { i32, ptr } %23
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { nounwind "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}


; 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 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare { i32, ptr } @_ZN4chen3sys5errorEv() local_unnamed_addr #1

; 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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind
declare i32 @ioctl(i32 noundef, i64 noundef, ...) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local { i32, ptr } @_ZN4chen5ioctl11nonblockingEib(i32 noundef %0, i1 noundef zeroext %1) local_unnamed_addr #4 align 2 {
  %3 = alloca %"class.std::error_code", align 8
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  %5 = zext i1 %1 to i32
  store i32 %5, ptr %4, align 4, !tbaa !5
  %6 = call i32 (i32, i64, ...) @ioctl(i32 noundef %0, i64 noundef 21537, ptr noundef nonnull %4) #5
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %8, label %12

8:                                                ; preds = %2
  %9 = call { i32, ptr } @_ZN4chen3sys5errorEv()
  %10 = extractvalue { i32, ptr } %9, 0
  %11 = extractvalue { i32, ptr } %9, 1
  br label %13

12:                                               ; preds = %2
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #5
  %.fca.0.load.pre = load i32, ptr %3, align 8
  %.fca.1.gep.phi.trans.insert = getelementptr inbounds i8, ptr %3, i64 8
  %.fca.1.load.pre = load ptr, ptr %.fca.1.gep.phi.trans.insert, align 8
  br label %13

13:                                               ; preds = %12, %8
  %.fca.1.load = phi ptr [ %.fca.1.load.pre, %12 ], [ %11, %8 ]
  %.fca.0.load = phi i32 [ %.fca.0.load.pre, %12 ], [ %10, %8 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  %.fca.0.insert = insertvalue { i32, ptr } poison, i32 %.fca.0.load, 0
  %.fca.1.insert = insertvalue { i32, ptr } %.fca.0.insert, ptr %.fca.1.load, 1
  ret { i32, ptr } %.fca.1.insert
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { nounwind "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: BDCEPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass