; 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 }
%struct.MerryPipe = type { %union.anon, i8, i8, i8 }
%union.anon = type { [2 x i32] }
%struct.anon = type { i32, i32 }

@stderr = external global ptr, align 8
@.str.5 = external hidden unnamed_addr constant [63 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [79 x i8], align 1

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

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @merry_channel_read(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %15, label %10

10:                                               ; preds = %7
  br label %11

11:                                               ; preds = %10
  %12 = load ptr, ptr @stderr, align 8, !tbaa !5
  %13 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %12, ptr noundef @.str.5, ptr noundef @.str.6, ptr noundef @.str.7, i32 noundef 68, ptr noundef @.str.8, ptr noundef @.str.9, ptr noundef @.str.7) #3
  br label %14

14:                                               ; preds = %11
  br label %15

15:                                               ; preds = %14, %7
  br label %16

16:                                               ; preds = %15
  br label %17

17:                                               ; preds = %16
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %25, label %20

20:                                               ; preds = %17
  br label %21

21:                                               ; preds = %20
  %22 = load ptr, ptr @stderr, align 8, !tbaa !5
  %23 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %22, ptr noundef @.str.5, ptr noundef @.str.6, ptr noundef @.str.7, i32 noundef 69, ptr noundef @.str.8, ptr noundef @.str.9, ptr noundef @.str.7) #3
  br label %24

24:                                               ; preds = %21
  br label %25

25:                                               ; preds = %24, %17
  br label %26

26:                                               ; preds = %25
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.MerrySubChannel, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  %30 = getelementptr inbounds %struct.MerryPipe, ptr %29, i32 0, i32 0
  %31 = getelementptr inbounds %struct.anon, ptr %30, i32 0, i32 0
  %32 = load i32, ptr %31, align 4, !tbaa !13
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load ptr, ptr %33, align 8, !tbaa !5
  %35 = load i64, ptr %6, align 8, !tbaa !9
  %36 = call i64 @read(i32 noundef %32, ptr noundef %34, i64 noundef %35)
  ret i8 0
}

declare i64 @read(i32 noundef, ptr noundef, i64 noundef) #2

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 = { 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 #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 }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"MerrySubChannel", !6, i64 0, !6, i64 8, !7, i64 16}
!13 = !{!7, !7, i64 0}


; 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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str.5 = external hidden unnamed_addr constant [63 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [79 x i8], align 1

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

; Function Attrs: nofree nounwind uwtable
define dso_local noundef zeroext i8 @merry_channel_read(ptr noundef readonly %0, ptr noundef readonly %1, i64 noundef %2) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %4, label %7

4:                                                ; preds = %3
  %5 = load ptr, ptr @stderr, align 8, !tbaa !5
  %6 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %5, ptr noundef nonnull @.str.5, ptr noundef nonnull @.str.6, ptr noundef nonnull @.str.7, i32 noundef 68, ptr noundef nonnull @.str.8, ptr noundef nonnull @.str.9, ptr noundef nonnull @.str.7) #3
  br label %7

7:                                                ; preds = %4, %3
  %.not4 = icmp eq ptr %1, null
  br i1 %.not4, label %8, label %11

8:                                                ; preds = %7
  %9 = load ptr, ptr @stderr, align 8, !tbaa !5
  %10 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %9, ptr noundef nonnull @.str.5, ptr noundef nonnull @.str.6, ptr noundef nonnull @.str.7, i32 noundef 69, ptr noundef nonnull @.str.8, ptr noundef nonnull @.str.9, ptr noundef nonnull @.str.7) #3
  br label %11

11:                                               ; preds = %7, %8
  %12 = getelementptr inbounds i8, ptr %0, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = load i32, ptr %13, align 4, !tbaa !11
  %15 = load ptr, ptr %1, align 8, !tbaa !5
  %16 = tail call i64 @read(i32 noundef %14, ptr noundef %15, i64 noundef %2) #4
  ret i8 0
}

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #2

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 = { nofree 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 #2 = { nofree "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 = { cold nounwind }
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 8}
!10 = !{!"MerrySubChannel", !6, i64 0, !6, i64 8, !7, i64 16}
!11 = !{!7, !7, i64 0}


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