; LLVM IR from zhemao/libds :: vector (vector_swap)

; 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.vector = type { ptr, ptr, i64, i64, ptr }

; 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 @vector_swap(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.vector, ptr %11, i32 0, i32 2
  %13 = load i64, ptr %12, align 8, !tbaa !11
  %14 = icmp uge i64 %10, %13
  br i1 %14, label %22, label %15

15:                                               ; preds = %3
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.vector, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !11
  %21 = icmp uge i64 %17, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %15, %3
  store i32 1, ptr %8, align 4
  br label %51

23:                                               ; preds = %15
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.vector, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !14
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds ptr, ptr %26, i64 %28
  %30 = load ptr, ptr %29, align 8, !tbaa !5
  store ptr %30, ptr %7, align 8, !tbaa !5
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.vector, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !14
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds ptr, ptr %33, i64 %35
  %37 = load ptr, ptr %36, align 8, !tbaa !5
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.vector, ptr %38, i32 0, i32 0
  %40 = load ptr, ptr %39, align 8, !tbaa !14
  %41 = load i32, ptr %5, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds ptr, ptr %40, i64 %42
  store ptr %37, ptr %43, align 8, !tbaa !5
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.vector, ptr %45, i32 0, i32 0
  %47 = load ptr, ptr %46, align 8, !tbaa !14
  %48 = load i32, ptr %6, align 4, !tbaa !9
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds ptr, ptr %47, i64 %49
  store ptr %44, ptr %50, align 8, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %51

51:                                               ; preds = %23, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  %52 = load i32, ptr %8, align 4
  switch i32 %52, label %54 [
    i32 0, label %53
    i32 1, label %53
  ]

53:                                               ; preds = %51, %51
  ret void

54:                                               ; preds = %51
  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 = { 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 = !{!"int", !7, i64 0}
!11 = !{!12, !13, i64 16}
!12 = !{!"vector", !6, i64 0, !6, i64 8, !13, i64 16, !13, i64 24, !6, i64 32}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !6, 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: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @vector_swap(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %1 to i64
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %.not = icmp ugt i64 %6, %4
  br i1 %.not, label %7, label %17

7:                                                ; preds = %3
  %8 = sext i32 %2 to i64
  %.not14 = icmp ugt i64 %6, %8
  br i1 %.not14, label %9, label %17

9:                                                ; preds = %7
  %10 = load ptr, ptr %0, align 8, !tbaa !11
  %11 = getelementptr inbounds ptr, ptr %10, i64 %4
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  %13 = getelementptr inbounds ptr, ptr %10, i64 %8
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  store ptr %14, ptr %11, align 8, !tbaa !12
  %15 = load ptr, ptr %0, align 8, !tbaa !11
  %16 = getelementptr inbounds ptr, ptr %15, i64 %8
  store ptr %12, ptr %16, align 8, !tbaa !12
  br label %17

17:                                               ; preds = %3, %7, %9
  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, !10, i64 16}
!6 = !{!"vector", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !7, i64 0}


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