; LLVM IR from BrunoLevy/learn-fpga :: LiteX/software/Doom/mc1-doom/src (p_enemy)

; 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.mobj_s = type { %struct.thinker_s, i32, i32, i32, ptr, ptr, i32, i32, i32, ptr, ptr, ptr, i32, i32, i32, i32, i32, i32, i32, i32, i32, ptr, i32, ptr, i32, i32, i32, i32, ptr, i32, i32, ptr, i32, %struct.mapthing_t, ptr }
%struct.thinker_s = type { ptr, ptr, %union.actionf_t }
%union.actionf_t = type { ptr }
%struct.mapthing_t = type { i16, i16, i16, i16, i16 }

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

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @P_CheckMeleeRange(ptr noundef) #1

declare i32 @P_Random() #2

; Function Attrs: nounwind uwtable
declare dso_local void @A_FaceTarget(ptr noundef) #1

declare ptr @P_SpawnMissile(ptr noundef, ptr noundef, i32 noundef) #2

declare void @P_DamageMobj(ptr noundef, ptr noundef, ptr noundef, i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @A_HeadAttack(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.mobj_s, ptr %5, i32 0, i32 28
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %32

10:                                               ; preds = %1
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  call void @A_FaceTarget(ptr noundef %11)
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = call i32 @P_CheckMeleeRange(ptr noundef %12)
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %26

15:                                               ; preds = %10
  %16 = call i32 @P_Random()
  %17 = srem i32 %16, 6
  %18 = add nsw i32 %17, 1
  %19 = mul nsw i32 %18, 10
  store i32 %19, ptr %3, align 4, !tbaa !15
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.mobj_s, ptr %20, i32 0, i32 28
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = load i32, ptr %3, align 4, !tbaa !15
  call void @P_DamageMobj(ptr noundef %22, ptr noundef %23, ptr noundef %24, i32 noundef %25)
  store i32 1, ptr %4, align 4
  br label %32

26:                                               ; preds = %10
  %27 = load ptr, ptr %2, align 8, !tbaa !5
  %28 = load ptr, ptr %2, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.mobj_s, ptr %28, i32 0, i32 28
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  %31 = call ptr @P_SpawnMissile(ptr noundef %27, ptr noundef %30, i32 noundef 32)
  store i32 0, ptr %4, align 4
  br label %32

32:                                               ; preds = %26, %15, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  %33 = load i32, ptr %4, align 4
  switch i32 %33, label %35 [
    i32 0, label %34
    i32 1, label %34
  ]

34:                                               ; preds = %32, %32
  ret void

35:                                               ; preds = %32
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 176}
!10 = !{!"mobj_s", !11, i64 0, !12, i64 24, !12, i64 28, !12, i64 32, !6, i64 40, !6, i64 48, !12, i64 56, !12, i64 60, !12, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !12, i64 96, !12, i64 100, !12, i64 104, !12, i64 108, !12, i64 112, !12, i64 116, !12, i64 120, !12, i64 124, !12, i64 128, !6, i64 136, !12, i64 144, !6, i64 152, !12, i64 160, !12, i64 164, !12, i64 168, !12, i64 172, !6, i64 176, !12, i64 184, !12, i64 188, !6, i64 192, !12, i64 200, !13, i64 204, !6, i64 216}
!11 = !{!"thinker_s", !6, i64 0, !6, i64 8, !7, i64 16}
!12 = !{!"int", !7, i64 0}
!13 = !{!"", !14, i64 0, !14, i64 2, !14, i64 4, !14, i64 6, !14, i64 8}
!14 = !{!"short", !7, i64 0}
!15 = !{!12, !12, 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"

; Function Attrs: nounwind uwtable
declare dso_local i32 @P_CheckMeleeRange(ptr noundef) local_unnamed_addr #0

declare i32 @P_Random() local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @A_FaceTarget(ptr noundef) local_unnamed_addr #0

declare ptr @P_SpawnMissile(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

declare void @P_DamageMobj(ptr noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @A_HeadAttack(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 176
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %15, label %4

4:                                                ; preds = %1
  tail call void @A_FaceTarget(ptr noundef nonnull %0)
  %5 = tail call i32 @P_CheckMeleeRange(ptr noundef nonnull %0)
  %.not8 = icmp eq i32 %5, 0
  br i1 %.not8, label %12, label %6

6:                                                ; preds = %4
  %7 = tail call i32 @P_Random() #2
  %8 = srem i32 %7, 6
  %9 = mul nsw i32 %8, 10
  %10 = add nsw i32 %9, 10
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  tail call void @P_DamageMobj(ptr noundef %11, ptr noundef nonnull %0, ptr noundef nonnull %0, i32 noundef %10) #2
  br label %15

12:                                               ; preds = %4
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = tail call ptr @P_SpawnMissile(ptr noundef nonnull %0, ptr noundef %13, i32 noundef 32) #2
  br label %15

15:                                               ; preds = %1, %12, %6
  ret void
}

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, !8, i64 176}
!6 = !{!"mobj_s", !7, i64 0, !11, i64 24, !11, i64 28, !11, i64 32, !8, i64 40, !8, i64 48, !11, i64 56, !11, i64 60, !11, i64 64, !8, i64 72, !8, i64 80, !8, i64 88, !11, i64 96, !11, i64 100, !11, i64 104, !11, i64 108, !11, i64 112, !11, i64 116, !11, i64 120, !11, i64 124, !11, i64 128, !8, i64 136, !11, i64 144, !8, i64 152, !11, i64 160, !11, i64 164, !11, i64 168, !11, i64 172, !8, i64 176, !11, i64 184, !11, i64 188, !8, i64 192, !11, i64 200, !12, i64 204, !8, i64 216}
!7 = !{!"thinker_s", !8, i64 0, !8, i64 8, !9, i64 16}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"int", !9, i64 0}
!12 = !{!"", !13, i64 0, !13, i64 2, !13, i64 4, !13, i64 6, !13, i64 8}
!13 = !{!"short", !9, i64 0}


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