; 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

declare i32 @P_Random() #1

declare void @S_StartSound(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @A_FaceTarget(ptr noundef) #2

declare i32 @P_AimLineAttack(ptr noundef, i32 noundef, i32 noundef) #1

declare void @P_LineAttack(ptr noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @A_SPosAttack(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.mobj_s, ptr %9, i32 0, i32 28
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %12 = icmp ne ptr %11, null
  br i1 %12, label %14, label %13

13:                                               ; preds = %1
  store i32 1, ptr %8, align 4
  br label %45

14:                                               ; preds = %1
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  call void @S_StartSound(ptr noundef %15, i32 noundef 2)
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  call void @A_FaceTarget(ptr noundef %16)
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mobj_s, ptr %17, i32 0, i32 6
  %19 = load i32, ptr %18, align 8, !tbaa !15
  store i32 %19, ptr %5, align 4, !tbaa !16
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !16
  %22 = call i32 @P_AimLineAttack(ptr noundef %20, i32 noundef %21, i32 noundef 134217728)
  store i32 %22, ptr %7, align 4, !tbaa !16
  store i32 0, ptr %3, align 4, !tbaa !16
  br label %23

23:                                               ; preds = %41, %14
  %24 = load i32, ptr %3, align 4, !tbaa !16
  %25 = icmp slt i32 %24, 3
  br i1 %25, label %26, label %44

26:                                               ; preds = %23
  %27 = load i32, ptr %5, align 4, !tbaa !16
  %28 = call i32 @P_Random()
  %29 = call i32 @P_Random()
  %30 = sub nsw i32 %28, %29
  %31 = shl i32 %30, 20
  %32 = add nsw i32 %27, %31
  store i32 %32, ptr %4, align 4, !tbaa !16
  %33 = call i32 @P_Random()
  %34 = srem i32 %33, 5
  %35 = add nsw i32 %34, 1
  %36 = mul nsw i32 %35, 3
  store i32 %36, ptr %6, align 4, !tbaa !16
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = load i32, ptr %4, align 4, !tbaa !16
  %39 = load i32, ptr %7, align 4, !tbaa !16
  %40 = load i32, ptr %6, align 4, !tbaa !16
  call void @P_LineAttack(ptr noundef %37, i32 noundef %38, i32 noundef 134217728, i32 noundef %39, i32 noundef %40)
  br label %41

41:                                               ; preds = %26
  %42 = load i32, ptr %3, align 4, !tbaa !16
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %3, align 4, !tbaa !16
  br label %23, !llvm.loop !17

44:                                               ; preds = %23
  store i32 0, ptr %8, align 4
  br label %45

45:                                               ; preds = %44, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  %46 = load i32, ptr %8, align 4
  switch i32 %46, label %48 [
    i32 0, label %47
    i32 1, label %47
  ]

47:                                               ; preds = %45, %45
  ret void

48:                                               ; preds = %45
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 = !{!10, !12, i64 56}
!16 = !{!12, !12, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


; 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"

declare i32 @P_Random() local_unnamed_addr #0

declare void @S_StartSound(ptr noundef, i32 noundef) local_unnamed_addr #0

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

declare i32 @P_AimLineAttack(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

declare void @P_LineAttack(ptr noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @A_SPosAttack(ptr noundef %0) local_unnamed_addr #1 {
  %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 %.loopexit, label %.loopexit.loopexit

.loopexit.loopexit:                               ; preds = %1
  tail call void @S_StartSound(ptr noundef nonnull %0, i32 noundef 2) #2
  tail call void @A_FaceTarget(ptr noundef nonnull %0)
  %4 = getelementptr inbounds i8, ptr %0, i64 56
  %5 = load i32, ptr %4, align 8, !tbaa !14
  %6 = tail call i32 @P_AimLineAttack(ptr noundef nonnull %0, i32 noundef %5, i32 noundef 134217728) #2
  %7 = tail call i32 @P_Random() #2
  %8 = tail call i32 @P_Random() #2
  %9 = sub nsw i32 %7, %8
  %10 = shl i32 %9, 20
  %11 = add nsw i32 %10, %5
  %12 = tail call i32 @P_Random() #2
  %13 = srem i32 %12, 5
  %14 = mul nsw i32 %13, 3
  %15 = add nsw i32 %14, 3
  tail call void @P_LineAttack(ptr noundef nonnull %0, i32 noundef %11, i32 noundef 134217728, i32 noundef %6, i32 noundef %15) #2
  %16 = tail call i32 @P_Random() #2
  %17 = tail call i32 @P_Random() #2
  %18 = sub nsw i32 %16, %17
  %19 = shl i32 %18, 20
  %20 = add nsw i32 %19, %5
  %21 = tail call i32 @P_Random() #2
  %22 = srem i32 %21, 5
  %23 = mul nsw i32 %22, 3
  %24 = add nsw i32 %23, 3
  tail call void @P_LineAttack(ptr noundef nonnull %0, i32 noundef %20, i32 noundef 134217728, i32 noundef %6, i32 noundef %24) #2
  %25 = tail call i32 @P_Random() #2
  %26 = tail call i32 @P_Random() #2
  %27 = sub nsw i32 %25, %26
  %28 = shl i32 %27, 20
  %29 = add nsw i32 %28, %5
  %30 = tail call i32 @P_Random() #2
  %31 = srem i32 %30, 5
  %32 = mul nsw i32 %31, 3
  %33 = add nsw i32 %32, 3
  tail call void @P_LineAttack(ptr noundef nonnull %0, i32 noundef %29, i32 noundef 134217728, i32 noundef %6, i32 noundef %33) #2
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.loopexit, %1
  ret void
}

attributes #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 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 = { 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}
!14 = !{!6, !11, i64 56}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass