; LLVM IR from QiaoLiuHit/LSOTB-TIR :: vlfeat-0.9.19/vl (stringop)

; 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
define dso_local i64 @vl_string_copy_sub(ptr noundef %0, i64 noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i8, align 1
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  store i64 0, ptr %10, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %36, %4
  %12 = load ptr, ptr %7, align 8, !tbaa !5
  %13 = load ptr, ptr %8, align 8, !tbaa !5
  %14 = icmp ult ptr %12, %13
  br i1 %14, label %15, label %21

15:                                               ; preds = %11
  %16 = load ptr, ptr %7, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i32 1
  store ptr %17, ptr %7, align 8, !tbaa !5
  %18 = load i8, ptr %16, align 1, !tbaa !11
  store i8 %18, ptr %9, align 1, !tbaa !11
  %19 = sext i8 %18 to i32
  %20 = icmp ne i32 %19, 0
  br label %21

21:                                               ; preds = %15, %11
  %22 = phi i1 [ false, %11 ], [ %20, %15 ]
  br i1 %22, label %23, label %39

23:                                               ; preds = %21
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %36

26:                                               ; preds = %23
  %27 = load i64, ptr %10, align 8, !tbaa !9
  %28 = add i64 %27, 1
  %29 = load i64, ptr %6, align 8, !tbaa !9
  %30 = icmp ult i64 %28, %29
  br i1 %30, label %31, label %36

31:                                               ; preds = %26
  %32 = load i8, ptr %9, align 1, !tbaa !11
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %10, align 8, !tbaa !9
  %35 = getelementptr inbounds i8, ptr %33, i64 %34
  store i8 %32, ptr %35, align 1, !tbaa !11
  br label %36

36:                                               ; preds = %31, %26, %23
  %37 = load i64, ptr %10, align 8, !tbaa !9
  %38 = add i64 %37, 1
  store i64 %38, ptr %10, align 8, !tbaa !9
  br label %11, !llvm.loop !12

39:                                               ; preds = %21
  %40 = load i64, ptr %6, align 8, !tbaa !9
  %41 = icmp ugt i64 %40, 0
  br i1 %41, label %42, label %56

42:                                               ; preds = %39
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load i64, ptr %10, align 8, !tbaa !9
  %45 = load i64, ptr %6, align 8, !tbaa !9
  %46 = sub i64 %45, 1
  %47 = icmp ult i64 %44, %46
  br i1 %47, label %48, label %50

48:                                               ; preds = %42
  %49 = load i64, ptr %10, align 8, !tbaa !9
  br label %53

50:                                               ; preds = %42
  %51 = load i64, ptr %6, align 8, !tbaa !9
  %52 = sub i64 %51, 1
  br label %53

53:                                               ; preds = %50, %48
  %54 = phi i64 [ %49, %48 ], [ %52, %50 ]
  %55 = getelementptr inbounds i8, ptr %43, i64 %54
  store i8 0, ptr %55, align 1, !tbaa !11
  br label %56

56:                                               ; preds = %53, %39
  %57 = load i64, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #2
  ret i64 %57
}

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 long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; 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: nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local i64 @vl_string_copy_sub(ptr noundef writeonly %0, i64 noundef %1, ptr noundef readonly %2, ptr noundef readnone %3) local_unnamed_addr #0 {
  %5 = icmp ult ptr %2, %3
  br i1 %5, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %4
  %6 = ptrtoint ptr %3 to i64
  %7 = ptrtoint ptr %2 to i64
  %.not20.not = icmp eq ptr %0, null
  %8 = sub i64 %6, %7
  br i1 %.not20.not, label %.lr.ph.split.us, label %.lr.ph.split

.lr.ph.split.us:                                  ; preds = %.lr.ph, %10
  %.023.us = phi i64 [ %12, %10 ], [ 0, %.lr.ph ]
  %.01622.us = phi ptr [ %11, %10 ], [ %2, %.lr.ph ]
  %9 = load i8, ptr %.01622.us, align 1, !tbaa !5
  %.not.us = icmp eq i8 %9, 0
  br i1 %.not.us, label %.critedge, label %10

10:                                               ; preds = %.lr.ph.split.us
  %11 = getelementptr inbounds i8, ptr %.01622.us, i64 1
  %12 = add i64 %.023.us, 1
  %exitcond29.not = icmp eq i64 %12, %8
  br i1 %exitcond29.not, label %.critedge, label %.lr.ph.split.us, !llvm.loop !8

.lr.ph.split:                                     ; preds = %.lr.ph, %20
  %.023 = phi i64 [ %16, %20 ], [ 0, %.lr.ph ]
  %.01622 = phi ptr [ %13, %20 ], [ %2, %.lr.ph ]
  %13 = getelementptr inbounds i8, ptr %.01622, i64 1
  %14 = load i8, ptr %.01622, align 1, !tbaa !5
  %.not = icmp eq i8 %14, 0
  br i1 %.not, label %.critedge, label %15

15:                                               ; preds = %.lr.ph.split
  %16 = add i64 %.023, 1
  %17 = icmp ult i64 %16, %1
  br i1 %17, label %18, label %20

18:                                               ; preds = %15
  %19 = getelementptr inbounds i8, ptr %0, i64 %.023
  store i8 %14, ptr %19, align 1, !tbaa !5
  br label %20

20:                                               ; preds = %18, %15
  %exitcond.not = icmp eq i64 %16, %8
  br i1 %exitcond.not, label %.critedge, label %.lr.ph.split, !llvm.loop !8

.critedge:                                        ; preds = %.lr.ph.split, %20, %.lr.ph.split.us, %10, %4
  %.0.lcssa = phi i64 [ 0, %4 ], [ %8, %10 ], [ %.023.us, %.lr.ph.split.us ], [ %8, %20 ], [ %.023, %.lr.ph.split ]
  %.not19 = icmp eq i64 %1, 0
  br i1 %.not19, label %25, label %21

21:                                               ; preds = %.critedge
  %22 = add i64 %1, -1
  %23 = tail call i64 @llvm.umin.i64(i64 %.0.lcssa, i64 %22)
  %24 = getelementptr inbounds i8, ptr %0, i64 %23
  store i8 0, ptr %24, align 1, !tbaa !5
  br label %25

25:                                               ; preds = %21, %.critedge
  ret i64 %.0.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #1

attributes #0 = { nofree norecurse nosync nounwind memory(read, argmem: 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass