; LLVM IR from AngoraFuzzer/Angora :: llvm_mode/dfsan_rt/sanitizer_common (sanitizer_libc)

; 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: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN11__sanitizer15internal_memsetEPvim(ptr noundef, i32 noundef, i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN11__sanitizer16internal_strncpyEPcPKcm(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %28, %3
  %9 = load i64, ptr %7, align 8, !tbaa !9
  %10 = load i64, ptr %6, align 8, !tbaa !9
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %12, label %18

12:                                               ; preds = %8
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = getelementptr inbounds i8, ptr %13, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = icmp ne i8 %16, 0
  br label %18

18:                                               ; preds = %12, %8
  %19 = phi i1 [ false, %8 ], [ %17, %12 ]
  br i1 %19, label %20, label %31

20:                                               ; preds = %18
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %7, align 8, !tbaa !9
  %23 = getelementptr inbounds i8, ptr %21, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = getelementptr inbounds i8, ptr %25, i64 %26
  store i8 %24, ptr %27, align 1, !tbaa !11
  br label %28

28:                                               ; preds = %20
  %29 = load i64, ptr %7, align 8, !tbaa !9
  %30 = add i64 %29, 1
  store i64 %30, ptr %7, align 8, !tbaa !9
  br label %8, !llvm.loop !12

31:                                               ; preds = %18
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = load i64, ptr %7, align 8, !tbaa !9
  %34 = getelementptr inbounds i8, ptr %32, i64 %33
  %35 = load i64, ptr %6, align 8, !tbaa !9
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = sub i64 %35, %36
  %38 = call noundef ptr @_ZN11__sanitizer15internal_memsetEPvim(ptr noundef %34, i32 noundef 0, i64 noundef %37)
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret ptr %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"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: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN11__sanitizer15internal_memsetEPvim(ptr noundef, i32 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN11__sanitizer16internal_strncpyEPcPKcm(ptr noundef returned %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not17 = icmp eq i64 %2, 0
  br i1 %.not17, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %6
  %.014 = phi i64 [ %8, %6 ], [ 0, %3 ]
  %4 = getelementptr inbounds i8, ptr %1, i64 %.014
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %.not = icmp eq i8 %5, 0
  br i1 %.not, label %.critedge, label %6

6:                                                ; preds = %.lr.ph
  %7 = getelementptr inbounds i8, ptr %0, i64 %.014
  store i8 %5, ptr %7, align 1, !tbaa !5
  %8 = add nuw i64 %.014, 1
  %exitcond.not = icmp eq i64 %8, %2
  br i1 %exitcond.not, label %.critedge, label %.lr.ph, !llvm.loop !8

.critedge:                                        ; preds = %.lr.ph, %6, %3
  %.0.lcssa = phi i64 [ 0, %3 ], [ %2, %6 ], [ %.014, %.lr.ph ]
  %9 = getelementptr inbounds i8, ptr %0, i64 %.0.lcssa
  %10 = sub i64 %2, %.0.lcssa
  %11 = tail call noundef ptr @_ZN11__sanitizer15internal_memsetEPvim(ptr noundef %9, i32 noundef 0, i64 noundef %10)
  ret ptr %0
}

attributes #0 = { mustprogress 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass