; LLVM IR from 0intro/wmii :: lib/libstuff/event (event)

; 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"

@event_handler = external dso_local global [36 x ptr], align 16
@event_debug = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @event_dispatch(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr @event_debug, align 8, !tbaa !5
  %4 = icmp ne ptr %3, null
  br i1 %4, label %5, label %8

5:                                                ; preds = %1
  %6 = load ptr, ptr @event_debug, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  call void %6(ptr noundef %7)
  br label %8

8:                                                ; preds = %5, %1
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = load i32, ptr %9, align 8, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = icmp ult i64 %11, 36
  br i1 %12, label %13, label %28

13:                                               ; preds = %8
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i32, ptr %14, align 8, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [36 x ptr], ptr @event_handler, i64 0, i64 %16
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %20, label %27

20:                                               ; preds = %13
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = load i32, ptr %21, align 8, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [36 x ptr], ptr @event_handler, i64 0, i64 %23
  %25 = load ptr, ptr %24, align 8, !tbaa !5
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  call void %25(ptr noundef %26)
  br label %27

27:                                               ; preds = %20, %13
  br label %30

28:                                               ; preds = %8
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  call void @xext_event(ptr noundef %29)
  br label %30

30:                                               ; preds = %28, %27
  ret void
}

declare void @xext_event(ptr noundef) #1

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 = { "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" }

!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 = !{!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"

@event_handler = external dso_local local_unnamed_addr global [36 x ptr], align 16
@event_debug = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @event_dispatch(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @event_debug, align 8, !tbaa !5
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %4, label %3

3:                                                ; preds = %1
  tail call void %2(ptr noundef %0) #2
  br label %4

4:                                                ; preds = %3, %1
  %5 = load i32, ptr %0, align 8, !tbaa !9
  %6 = icmp ult i32 %5, 36
  br i1 %6, label %7, label %12

7:                                                ; preds = %4
  %8 = zext nneg i32 %5 to i64
  %9 = getelementptr inbounds [36 x ptr], ptr @event_handler, i64 0, i64 %8
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %.not8 = icmp eq ptr %10, null
  br i1 %.not8, label %13, label %11

11:                                               ; preds = %7
  tail call void %10(ptr noundef nonnull %0) #2
  br label %13

12:                                               ; preds = %4
  tail call void @xext_event(ptr noundef nonnull %0) #2
  br label %13

13:                                               ; preds = %7, %11, %12
  ret void
}

declare void @xext_event(ptr noundef) local_unnamed_addr #1

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 = { "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 }

!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 = !{!7, !7, i64 0}


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