; LLVM IR from seppo0010/rlite :: src (restore)

; 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.rl_restore_streamer = type { ptr, ptr }
%struct.stringwithlength = type { ptr, i64 }

; Function Attrs: nounwind uwtable
define dso_local i32 @ucread(ptr noundef %0, ptr noundef %1, i64 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  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
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.rl_restore_streamer, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  store ptr %12, ptr %8, align 8, !tbaa !5
  %13 = load i64, ptr %7, align 8, !tbaa !9
  %14 = load ptr, ptr %8, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.stringwithlength, ptr %14, i32 0, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !13
  %17 = icmp sgt i64 %13, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %3
  store i32 6, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %39

19:                                               ; preds = %3
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %28

22:                                               ; preds = %19
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.stringwithlength, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !15
  %27 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %23, ptr align 1 %26, i64 %27, i1 false)
  br label %28

28:                                               ; preds = %22, %19
  %29 = load i64, ptr %7, align 8, !tbaa !9
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.stringwithlength, ptr %30, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8, !tbaa !15
  %33 = getelementptr inbounds i8, ptr %32, i64 %29
  store ptr %33, ptr %31, align 8, !tbaa !15
  %34 = load i64, ptr %7, align 8, !tbaa !9
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.stringwithlength, ptr %35, i32 0, i32 1
  %37 = load i64, ptr %36, align 8, !tbaa !13
  %38 = sub nsw i64 %37, %34
  store i64 %38, ptr %36, align 8, !tbaa !13
  store i32 0, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %39

39:                                               ; preds = %28, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %40 = load i32, ptr %4, align 4
  ret i32 %40
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"rl_restore_streamer", !6, i64 0, !6, i64 8}
!13 = !{!14, !10, i64 8}
!14 = !{!"stringwithlength", !6, i64 0, !10, i64 8}
!15 = !{!14, !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 range(i32 0, 7) i32 @ucread(ptr nocapture noundef readonly %0, ptr noundef writeonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  %6 = load i64, ptr %5, align 8, !tbaa !10
  %7 = icmp slt i64 %6, %2
  br i1 %7, label %16, label %8

8:                                                ; preds = %3
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %11, label %9

9:                                                ; preds = %8
  %10 = load ptr, ptr %4, align 8, !tbaa !13
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %1, ptr align 1 %10, i64 %2, i1 false)
  %.pre = load i64, ptr %5, align 8, !tbaa !10
  br label %11

11:                                               ; preds = %9, %8
  %12 = phi i64 [ %.pre, %9 ], [ %6, %8 ]
  %13 = load ptr, ptr %4, align 8, !tbaa !13
  %14 = getelementptr inbounds i8, ptr %13, i64 %2
  store ptr %14, ptr %4, align 8, !tbaa !13
  %15 = sub nsw i64 %12, %2
  store i64 %15, ptr %5, align 8, !tbaa !10
  br label %16

16:                                               ; preds = %3, %11
  %.0 = phi i32 [ 0, %11 ], [ 6, %3 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

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" }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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 = !{!"rl_restore_streamer", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !12, i64 8}
!11 = !{!"stringwithlength", !7, i64 0, !12, i64 8}
!12 = !{!"long", !8, i64 0}
!13 = !{!11, !7, i64 0}


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