; LLVM IR from Aeternum-Veritas/Merry :: merry (merry_subcomms)

; 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.MerrySubChannel = type { ptr, ptr, i8 }

@stdout = external global ptr, align 8
@.str.3 = external hidden unnamed_addr constant [41 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [40 x i8], align 1

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare ptr @merry_open_pipe(...) #2

declare void @merry_destroy_pipe(ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @merry_create_channel_given(ptr noundef %0) #3 {
  %2 = alloca i8, align 1
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr @stdout, align 8, !tbaa !5
  %8 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %7, ptr noundef @.str.3, ptr noundef null) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %9 = call ptr (...) @merry_open_pipe()
  store ptr %9, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %1
  store i8 1, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %26

12:                                               ; preds = %1
  %13 = call ptr (...) @merry_open_pipe()
  store ptr %13, ptr %5, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %17

15:                                               ; preds = %12
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  call void @merry_destroy_pipe(ptr noundef %16)
  store i8 1, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %26

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.MerrySubChannel, ptr %19, i32 0, i32 0
  store ptr %18, ptr %20, align 8, !tbaa !9
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.MerrySubChannel, ptr %22, i32 0, i32 1
  store ptr %21, ptr %23, align 8, !tbaa !11
  %24 = load ptr, ptr @stdout, align 8, !tbaa !5
  %25 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %24, ptr noundef @.str.4, ptr noundef null) #4
  store i8 0, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %26

26:                                               ; preds = %17, %15, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %27 = load i8, ptr %2, align 1
  ret i8 %27
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"MerrySubChannel", !6, i64 0, !6, i64 8, !7, i64 16}
!11 = !{!10, !6, i64 8}


; 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"

@stdout = external local_unnamed_addr global ptr, align 8
@.str.3 = external hidden unnamed_addr constant [41 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [40 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

declare ptr @merry_open_pipe(...) local_unnamed_addr #1

declare void @merry_destroy_pipe(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local zeroext range(i8 0, 2) i8 @merry_create_channel_given(ptr nocapture noundef writeonly %0) local_unnamed_addr #2 {
  %2 = load ptr, ptr @stdout, align 8, !tbaa !5
  %3 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %2, ptr noundef nonnull @.str.3, ptr noundef null) #3
  %4 = tail call ptr (...) @merry_open_pipe() #3
  %5 = icmp eq ptr %4, null
  br i1 %5, label %14, label %6

6:                                                ; preds = %1
  %7 = tail call ptr (...) @merry_open_pipe() #3
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %6
  tail call void @merry_destroy_pipe(ptr noundef nonnull %4) #3
  br label %14

10:                                               ; preds = %6
  store ptr %7, ptr %0, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %4, ptr %11, align 8, !tbaa !11
  %12 = load ptr, ptr @stdout, align 8, !tbaa !5
  %13 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %12, ptr noundef nonnull @.str.4, ptr noundef null) #3
  br label %14

14:                                               ; preds = %1, %10, %9
  %.0 = phi i8 [ 1, %9 ], [ 0, %10 ], [ 1, %1 ]
  ret i8 %.0
}

attributes #0 = { nofree 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 #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 = { 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 }

!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, !6, i64 0}
!10 = !{!"MerrySubChannel", !6, i64 0, !6, i64 8, !7, i64 16}
!11 = !{!10, !6, i64 8}


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