; 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_strcmpEPKcS1_(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %36, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load i8, ptr %10, align 1, !tbaa !9
  %12 = sext i8 %11 to i32
  store i32 %12, ptr %6, align 4, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i8, ptr %13, align 1, !tbaa !9
  %15 = sext i8 %14 to i32
  store i32 %15, ptr %7, align 4, !tbaa !10
  %16 = load i32, ptr %6, align 4, !tbaa !10
  %17 = load i32, ptr %7, align 4, !tbaa !10
  %18 = icmp ne i32 %16, %17
  br i1 %18, label %19, label %25

19:                                               ; preds = %9
  %20 = load i32, ptr %6, align 4, !tbaa !10
  %21 = load i32, ptr %7, align 4, !tbaa !10
  %22 = icmp ult i32 %20, %21
  %23 = zext i1 %22 to i64
  %24 = select i1 %22, i32 -1, i32 1
  store i32 %24, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %34

25:                                               ; preds = %9
  %26 = load i32, ptr %6, align 4, !tbaa !10
  %27 = icmp eq i32 %26, 0
  br i1 %27, label %28, label %29

28:                                               ; preds = %25
  store i32 3, ptr %8, align 4
  br label %34

29:                                               ; preds = %25
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %30, i32 1
  store ptr %31, ptr %4, align 8, !tbaa !5
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds i8, ptr %32, i32 1
  store ptr %33, ptr %5, align 8, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %34

34:                                               ; preds = %29, %28, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %35 = load i32, ptr %8, align 4
  switch i32 %35, label %40 [
    i32 0, label %36
    i32 1, label %38
    i32 3, label %37
  ]

36:                                               ; preds = %34
  br label %9, !llvm.loop !12

37:                                               ; preds = %34
  store i32 0, ptr %3, align 4
  br label %38

38:                                               ; preds = %37, %34
  %39 = load i32, ptr %3, align 4
  ret i32 %39

40:                                               ; preds = %34
  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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !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_strcmpEPKcS1_(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1, !tbaa !5
  %4 = load i8, ptr %1, align 1, !tbaa !5
  %.not30 = icmp eq i8 %3, %4
  br i1 %.not30, label %.lr.ph, label %.thread

.thread:                                          ; preds = %9, %2
  %.lcssa28 = phi i8 [ %3, %2 ], [ %12, %9 ]
  %.lcssa = phi i8 [ %4, %2 ], [ %13, %9 ]
  %5 = icmp ult i8 %.lcssa28, %.lcssa
  %6 = select i1 %5, i32 -1, i32 1
  br label %.loopexit

.lr.ph:                                           ; preds = %2, %9
  %7 = phi i8 [ %12, %9 ], [ %3, %2 ]
  %.01132 = phi ptr [ %10, %9 ], [ %0, %2 ]
  %.01331 = phi ptr [ %11, %9 ], [ %1, %2 ]
  %8 = icmp eq i8 %7, 0
  br i1 %8, label %.loopexit, label %9

9:                                                ; preds = %.lr.ph
  %10 = getelementptr inbounds i8, ptr %.01132, i64 1
  %11 = getelementptr inbounds i8, ptr %.01331, i64 1
  %12 = load i8, ptr %10, align 1, !tbaa !5
  %13 = load i8, ptr %11, align 1, !tbaa !5
  %.not = icmp eq i8 %12, %13
  br i1 %.not, label %.lr.ph, label %.thread

.loopexit:                                        ; preds = %.lr.ph, %.thread
  %.2 = phi i32 [ %6, %.thread ], [ 0, %.lr.ph ]
  ret i32 %.2
}

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"}


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