; LLVM IR from aws/s2n-tls :: tests/testlib (s2n_connection_test_utils)

; 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"

%struct.s2n_test_io_pair = type { i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @s2n_io_pair_init(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca [2 x i32], align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = call ptr @signal(i32 noundef 13, ptr noundef inttoptr (i64 1 to ptr)) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  br label %7

7:                                                ; preds = %1
  %8 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 0
  %9 = call i32 @socketpair(i32 noundef 1, i32 noundef 1, i32 noundef 0, ptr noundef %8) #3
  %10 = icmp sgt i32 %9, -1
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %23

12:                                               ; preds = %7
  br label %13

13:                                               ; preds = %12
  br label %14

14:                                               ; preds = %13
  %15 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 0
  %16 = load i32, ptr %15, align 4, !tbaa !9
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.s2n_test_io_pair, ptr %17, i32 0, i32 0
  store i32 %16, ptr %18, align 4, !tbaa !11
  %19 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 1
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.s2n_test_io_pair, ptr %21, i32 0, i32 1
  store i32 %20, ptr %22, align 4, !tbaa !13
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %23

23:                                               ; preds = %14, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %24 = load i32, ptr %2, align 4
  ret i32 %24
}

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind
declare i32 @socketpair(i32 noundef, i32 noundef, i32 noundef, ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { 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 #1 = { 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"s2n_test_io_pair", !10, i64 0, !10, i64 4}
!13 = !{!12, !10, i64 4}


; 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"

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @s2n_io_pair_init(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = alloca [2 x i32], align 8
  %3 = tail call ptr @signal(i32 noundef 13, ptr noundef nonnull inttoptr (i64 1 to ptr)) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %4 = call i32 @socketpair(i32 noundef 1, i32 noundef 1, i32 noundef 0, ptr noundef nonnull %2) #3
  %5 = icmp sgt i32 %4, -1
  br i1 %5, label %6, label %8

6:                                                ; preds = %1
  %7 = load <2 x i32>, ptr %2, align 8, !tbaa !5
  store <2 x i32> %7, ptr %0, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %1, %6
  %.0 = phi i32 [ 0, %6 ], [ -1, %1 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  ret i32 %.0
}

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind
declare i32 @socketpair(i32 noundef, i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { 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 #1 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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/C++ TBAA"}


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