; LLVM IR from VoidRune/Audio-engine :: src (minivorbis)

; 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.oggpack_buffer = type { i64, i32, ptr, ptr, i64 }

@mask8B = external hidden constant [9 x i32], align 16

; 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
define dso_local void @oggpackB_writetrunc(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load i64, ptr %4, align 8, !tbaa !9
  %7 = ashr i64 %6, 3
  store i64 %7, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.oggpack_buffer, ptr %8, i32 0, i32 3
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %41

12:                                               ; preds = %2
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = mul nsw i64 %13, 8
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = sub nsw i64 %15, %14
  store i64 %16, ptr %4, align 8, !tbaa !9
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.oggpack_buffer, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %18, align 8, !tbaa !14
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = getelementptr inbounds i8, ptr %19, i64 %20
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.oggpack_buffer, ptr %22, i32 0, i32 3
  store ptr %21, ptr %23, align 8, !tbaa !11
  %24 = load i64, ptr %4, align 8, !tbaa !9
  %25 = trunc i64 %24 to i32
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.oggpack_buffer, ptr %26, i32 0, i32 1
  store i32 %25, ptr %27, align 8, !tbaa !15
  %28 = load i64, ptr %5, align 8, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.oggpack_buffer, ptr %29, i32 0, i32 0
  store i64 %28, ptr %30, align 8, !tbaa !16
  %31 = load i64, ptr %4, align 8, !tbaa !9
  %32 = getelementptr inbounds [9 x i32], ptr @mask8B, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !17
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.oggpack_buffer, ptr %34, i32 0, i32 3
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  %37 = load i8, ptr %36, align 1, !tbaa !18
  %38 = zext i8 %37 to i32
  %39 = and i32 %38, %33
  %40 = trunc i32 %39 to i8
  store i8 %40, ptr %36, align 1, !tbaa !18
  br label %41

41:                                               ; preds = %12, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #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 = !{!"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 24}
!12 = !{!"", !10, i64 0, !13, i64 8, !6, i64 16, !6, i64 24, !10, i64 32}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !6, i64 16}
!15 = !{!12, !13, i64 8}
!16 = !{!12, !10, i64 0}
!17 = !{!13, !13, i64 0}
!18 = !{!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"

@mask8B = external hidden local_unnamed_addr constant [9 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @oggpackB_writetrunc(ptr nocapture noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %18, label %5

5:                                                ; preds = %2
  %6 = ashr i64 %1, 3
  %7 = and i64 %1, 7
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  %10 = getelementptr inbounds i8, ptr %9, i64 %6
  store ptr %10, ptr %3, align 8, !tbaa !5
  %11 = trunc nuw nsw i64 %7 to i32
  %12 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 %11, ptr %12, align 8, !tbaa !13
  store i64 %6, ptr %0, align 8, !tbaa !14
  %13 = getelementptr inbounds [9 x i32], ptr @mask8B, i64 0, i64 %7
  %14 = load i32, ptr %13, align 4, !tbaa !15
  %15 = load i8, ptr %10, align 1, !tbaa !16
  %16 = trunc i32 %14 to i8
  %17 = and i8 %15, %16
  store i8 %17, ptr %10, align 1, !tbaa !16
  br label %18

18:                                               ; preds = %5, %2
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) 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, !11, i64 24}
!6 = !{!"", !7, i64 0, !10, i64 8, !11, i64 16, !11, i64 24, !7, i64 32}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !11, i64 16}
!13 = !{!6, !10, i64 8}
!14 = !{!6, !7, i64 0}
!15 = !{!10, !10, i64 0}
!16 = !{!8, !8, i64 0}


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