; LLVM IR from tenok-rtos/tenok :: kernel (kfifo)

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

; Function Attrs: nounwind uwtable
define dso_local void @kfifo_init(ptr noundef %0, ptr noundef %1, i64 noundef %2, i64 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  store i64 %3, ptr %8, align 8, !tbaa !9
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.kfifo, ptr %9, i32 0, i32 0
  store i32 0, ptr %10, align 8, !tbaa !11
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.kfifo, ptr %11, i32 0, i32 1
  store i32 0, ptr %12, align 4, !tbaa !14
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.kfifo, ptr %13, i32 0, i32 2
  store i32 0, ptr %14, align 8, !tbaa !15
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.kfifo, ptr %16, i32 0, i32 3
  store ptr %15, ptr %17, align 8, !tbaa !16
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.kfifo, ptr %19, i32 0, i32 5
  store i64 %18, ptr %20, align 8, !tbaa !17
  %21 = load i64, ptr %8, align 8, !tbaa !9
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.kfifo, ptr %22, i32 0, i32 4
  store i64 %21, ptr %23, align 8, !tbaa !18
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.kfifo, ptr %24, i32 0, i32 5
  %26 = load i64, ptr %25, align 8, !tbaa !17
  %27 = icmp ugt i64 %26, 1
  br i1 %27, label %28, label %35

28:                                               ; preds = %4
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.kfifo, ptr %29, i32 0, i32 6
  store i64 2, ptr %30, align 8, !tbaa !19
  %31 = load i64, ptr %7, align 8, !tbaa !9
  %32 = add i64 2, %31
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.kfifo, ptr %33, i32 0, i32 7
  store i64 %32, ptr %34, align 8, !tbaa !20
  br label %40

35:                                               ; preds = %4
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.kfifo, ptr %36, i32 0, i32 6
  store i64 0, ptr %37, align 8, !tbaa !19
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.kfifo, ptr %38, i32 0, i32 7
  store i64 1, ptr %39, align 8, !tbaa !20
  br label %40

40:                                               ; preds = %35, %28
  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 = !{!"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, !13, i64 0}
!12 = !{!"kfifo", !13, i64 0, !13, i64 4, !13, i64 8, !6, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !10, i64 48}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !13, i64 4}
!15 = !{!12, !13, i64 8}
!16 = !{!12, !6, i64 16}
!17 = !{!12, !10, i64 32}
!18 = !{!12, !10, i64 24}
!19 = !{!12, !10, i64 40}
!20 = !{!12, !10, i64 48}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @kfifo_init(ptr nocapture noundef writeonly %0, ptr noundef %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  store i32 0, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 4
  store i32 0, ptr %5, align 4, !tbaa !12
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 0, ptr %6, align 8, !tbaa !13
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  store ptr %1, ptr %7, align 8, !tbaa !14
  %8 = getelementptr inbounds i8, ptr %0, i64 32
  store i64 %2, ptr %8, align 8, !tbaa !15
  %9 = getelementptr inbounds i8, ptr %0, i64 24
  store i64 %3, ptr %9, align 8, !tbaa !16
  %10 = icmp ugt i64 %2, 1
  %11 = add i64 %2, 2
  %spec.select = select i1 %10, i64 2, i64 0
  %spec.select15 = select i1 %10, i64 %11, i64 1
  %12 = getelementptr inbounds i8, ptr %0, i64 40
  store i64 %spec.select, ptr %12, align 8
  %13 = getelementptr inbounds i8, ptr %0, i64 48
  store i64 %spec.select15, ptr %13, align 8
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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, !7, i64 0}
!6 = !{!"kfifo", !7, i64 0, !7, i64 4, !7, i64 8, !10, i64 16, !11, i64 24, !11, i64 32, !11, i64 40, !11, i64 48}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!6, !7, i64 4}
!13 = !{!6, !7, i64 8}
!14 = !{!6, !10, i64 16}
!15 = !{!6, !11, i64 32}
!16 = !{!6, !11, i64 24}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass