; LLVM IR from Stephane-D/SGDK :: src (vdp)

; 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"

; 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 zeroext i8 @VDP_isEnable() #1

; Function Attrs: nounwind uwtable
define dso_local void @VDP_waitVActive(i8 noundef zeroext %0) #1 {
  %2 = alloca i8, align 1
  %3 = alloca ptr, align 8
  store i8 %0, ptr %2, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store ptr inttoptr (i64 12582916 to ptr), ptr %3, align 8, !tbaa !8
  %4 = load i8, ptr %2, align 1, !tbaa !5
  %5 = icmp ne i8 %4, 0
  br i1 %5, label %6, label %16

6:                                                ; preds = %1
  br label %7

7:                                                ; preds = %14, %6
  %8 = load ptr, ptr %3, align 8, !tbaa !8
  %9 = load volatile i16, ptr %8, align 2, !tbaa !10
  %10 = zext i16 %9 to i32
  %11 = and i32 %10, 8
  %12 = icmp ne i32 %11, 0
  %13 = xor i1 %12, true
  br i1 %13, label %14, label %15

14:                                               ; preds = %7
  br label %7, !llvm.loop !12

15:                                               ; preds = %7
  br label %16

16:                                               ; preds = %15, %1
  %17 = call zeroext i8 @VDP_isEnable()
  %18 = icmp ne i8 %17, 0
  br i1 %18, label %19, label %28

19:                                               ; preds = %16
  br label %20

20:                                               ; preds = %26, %19
  %21 = load ptr, ptr %3, align 8, !tbaa !8
  %22 = load volatile i16, ptr %21, align 2, !tbaa !10
  %23 = zext i16 %22 to i32
  %24 = and i32 %23, 8
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %26, label %27

26:                                               ; preds = %20
  br label %20, !llvm.loop !14

27:                                               ; preds = %20
  br label %28

28:                                               ; preds = %27, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret void
}

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 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}


; 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 zeroext i8 @VDP_isEnable() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @VDP_waitVActive(i8 noundef zeroext %0) local_unnamed_addr #0 {
  %.not = icmp eq i8 %0, 0
  br i1 %.not, label %.loopexit6, label %.preheader5

.preheader5:                                      ; preds = %1, %.preheader5
  %2 = load volatile i16, ptr inttoptr (i64 12582916 to ptr), align 4, !tbaa !5
  %3 = and i16 %2, 8
  %.not2 = icmp eq i16 %3, 0
  br i1 %.not2, label %.preheader5, label %.loopexit6, !llvm.loop !9

.loopexit6:                                       ; preds = %.preheader5, %1
  %4 = tail call zeroext i8 @VDP_isEnable()
  %.not3 = icmp eq i8 %4, 0
  br i1 %.not3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %.loopexit6, %.preheader
  %5 = load volatile i16, ptr inttoptr (i64 12582916 to ptr), align 4, !tbaa !5
  %6 = and i16 %5, 8
  %.not4 = icmp eq i16 %6, 0
  br i1 %.not4, label %.loopexit, label %.preheader, !llvm.loop !11

.loopexit:                                        ; preds = %.preheader, %.loopexit6
  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" }

!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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass