; 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__sanitizer15internal_memcmpEPKvS1_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 ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %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
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %12, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %13, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  store i64 0, ptr %10, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %38, %3
  %15 = load i64, ptr %10, align 8, !tbaa !9
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 2, ptr %11, align 4
  br label %45

19:                                               ; preds = %14
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = load ptr, ptr %9, align 8, !tbaa !5
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = sext i8 %24 to i32
  %26 = icmp ne i32 %22, %25
  br i1 %26, label %27, label %37

27:                                               ; preds = %19
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = sext i8 %29 to i32
  %31 = load ptr, ptr %9, align 8, !tbaa !5
  %32 = load i8, ptr %31, align 1, !tbaa !11
  %33 = sext i8 %32 to i32
  %34 = icmp slt i32 %30, %33
  %35 = zext i1 %34 to i64
  %36 = select i1 %34, i32 -1, i32 1
  store i32 %36, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %45

37:                                               ; preds = %19
  br label %38

38:                                               ; preds = %37
  %39 = load i64, ptr %10, align 8, !tbaa !9
  %40 = add i64 %39, 1
  store i64 %40, ptr %10, align 8, !tbaa !9
  %41 = load ptr, ptr %8, align 8, !tbaa !5
  %42 = getelementptr inbounds i8, ptr %41, i32 1
  store ptr %42, ptr %8, align 8, !tbaa !5
  %43 = load ptr, ptr %9, align 8, !tbaa !5
  %44 = getelementptr inbounds i8, ptr %43, i32 1
  store ptr %44, ptr %9, align 8, !tbaa !5
  br label %14, !llvm.loop !12

45:                                               ; preds = %27, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  %46 = load i32, ptr %11, align 4
  switch i32 %46, label %48 [
    i32 2, label %47
  ]

47:                                               ; preds = %45
  store i32 0, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %48

48:                                               ; preds = %47, %45
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %49 = load i32, ptr %4, align 4
  ret i32 %49
}

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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_ZN11__sanitizer15internal_memcmpEPKvS1_m(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not1820.not = icmp eq i64 %2, 0
  br i1 %.not1820.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %9
  %.01223 = phi i64 [ %10, %9 ], [ 0, %3 ]
  %.01322 = phi ptr [ %12, %9 ], [ %1, %3 ]
  %.01421 = phi ptr [ %11, %9 ], [ %0, %3 ]
  %4 = load i8, ptr %.01421, align 1, !tbaa !5
  %5 = load i8, ptr %.01322, align 1, !tbaa !5
  %.not = icmp eq i8 %4, %5
  br i1 %.not, label %9, label %6

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

9:                                                ; preds = %.lr.ph
  %10 = add nuw i64 %.01223, 1
  %11 = getelementptr inbounds i8, ptr %.01421, i64 1
  %12 = getelementptr inbounds i8, ptr %.01322, i64 1
  %exitcond.not = icmp eq i64 %10, %2
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !8

.loopexit:                                        ; preds = %9, %3, %6
  %spec.select = phi i32 [ %8, %6 ], [ 0, %3 ], [ 0, %9 ]
  ret i32 %spec.select
}

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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass