; 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
define dso_local noundef i32 @_ZN11__sanitizer16internal_strncmpEPKcS1_m(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = 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) #2
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %12

12:                                               ; preds = %45, %3
  %13 = load i64, ptr %8, align 8, !tbaa !9
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = icmp ult i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  store i32 2, ptr %9, align 4
  br label %48

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  store i32 %20, ptr %10, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i8, ptr %21, align 1, !tbaa !11
  %23 = sext i8 %22 to i32
  store i32 %23, ptr %11, align 4, !tbaa !12
  %24 = load i32, ptr %10, align 4, !tbaa !12
  %25 = load i32, ptr %11, align 4, !tbaa !12
  %26 = icmp ne i32 %24, %25
  br i1 %26, label %27, label %33

27:                                               ; preds = %17
  %28 = load i32, ptr %10, align 4, !tbaa !12
  %29 = load i32, ptr %11, align 4, !tbaa !12
  %30 = icmp ult i32 %28, %29
  %31 = zext i1 %30 to i64
  %32 = select i1 %30, i32 -1, i32 1
  store i32 %32, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %42

33:                                               ; preds = %17
  %34 = load i32, ptr %10, align 4, !tbaa !12
  %35 = icmp eq i32 %34, 0
  br i1 %35, label %36, label %37

36:                                               ; preds = %33
  store i32 2, ptr %9, align 4
  br label %42

37:                                               ; preds = %33
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = getelementptr inbounds i8, ptr %38, i32 1
  store ptr %39, ptr %5, align 8, !tbaa !5
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = getelementptr inbounds i8, ptr %40, i32 1
  store ptr %41, ptr %6, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %42

42:                                               ; preds = %37, %36, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %43 = load i32, ptr %9, align 4
  switch i32 %43, label %48 [
    i32 0, label %44
  ]

44:                                               ; preds = %42
  br label %45

45:                                               ; preds = %44
  %46 = load i64, ptr %8, align 8, !tbaa !9
  %47 = add i64 %46, 1
  store i64 %47, ptr %8, align 8, !tbaa !9
  br label %12, !llvm.loop !14

48:                                               ; preds = %42, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %49 = load i32, ptr %9, align 4
  switch i32 %49, label %53 [
    i32 2, label %50
    i32 1, label %51
  ]

50:                                               ; preds = %48
  store i32 0, ptr %4, align 4
  br label %51

51:                                               ; preds = %50, %48
  %52 = load i32, ptr %4, align 4
  ret i32 %52

53:                                               ; preds = %48
  unreachable
}

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 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_ZN11__sanitizer16internal_strncmpEPKcS1_m(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not37 = icmp eq i64 %2, 0
  br i1 %.not37, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %3, %9
  %.01432 = phi ptr [ %11, %9 ], [ %0, %3 ]
  %.01831 = phi i64 [ %13, %9 ], [ 0, %3 ]
  %.01930 = phi ptr [ %12, %9 ], [ %1, %3 ]
  %4 = load i8, ptr %.01432, align 1, !tbaa !5
  %5 = load i8, ptr %.01930, align 1, !tbaa !5
  %.not = icmp eq i8 %4, %5
  br i1 %.not, label %9, label %6

6:                                                ; preds = %.lr.ph
  %7 = icmp ult i8 %4, %5
  %8 = select i1 %7, i32 -1, i32 1
  br label %.thread

9:                                                ; preds = %.lr.ph
  %10 = icmp ne i8 %4, 0
  %11 = getelementptr inbounds i8, ptr %.01432, i64 1
  %12 = getelementptr inbounds i8, ptr %.01930, i64 1
  %13 = add nuw i64 %.01831, 1
  %14 = icmp ult i64 %13, %2
  %or.cond = select i1 %10, i1 %14, i1 false
  br i1 %or.cond, label %.lr.ph, label %.thread, !llvm.loop !8

.thread:                                          ; preds = %9, %3, %6
  %switch = phi i32 [ %8, %6 ], [ 0, %3 ], [ 0, %9 ]
  ret i32 %switch
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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, !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,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass