; LLVM IR from 0xilis/libNeoAppleArchive :: libNeoAppleArchive (libNeoAppleArchive_internal)

; 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 hidden ptr @internal_do_not_call_memrchr(ptr noundef %0, i32 noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load i64, ptr %7, align 8, !tbaa !11
  store i64 %10, ptr %8, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %28, %3
  %12 = load i64, ptr %8, align 8, !tbaa !11
  %13 = add i64 %12, -1
  store i64 %13, ptr %8, align 8, !tbaa !11
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i64, ptr %8, align 8, !tbaa !11
  %16 = getelementptr inbounds i8, ptr %14, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !13
  %18 = sext i8 %17 to i32
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = icmp eq i32 %18, %19
  br i1 %20, label %21, label %25

21:                                               ; preds = %11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %8, align 8, !tbaa !11
  %24 = getelementptr inbounds i8, ptr %22, i64 %23
  store ptr %24, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %30

25:                                               ; preds = %11
  %26 = load i64, ptr %8, align 8, !tbaa !11
  %27 = icmp ne i64 %26, 0
  br i1 %27, label %28, label %29

28:                                               ; preds = %25
  br label %11

29:                                               ; preds = %25
  store ptr null, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %30

30:                                               ; preds = %29, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %31 = load ptr, ptr %4, align 8
  ret ptr %31
}

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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!7, !7, i64 0}


; 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(argmem: read) uwtable
define hidden ptr @internal_do_not_call_memrchr(ptr noundef readonly %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  br label %4

4:                                                ; preds = %10, %3
  %.0 = phi i64 [ %2, %3 ], [ %5, %10 ]
  %5 = add i64 %.0, -1
  %6 = getelementptr inbounds i8, ptr %0, i64 %5
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = sext i8 %7 to i32
  %9 = icmp eq i32 %8, %1
  br i1 %9, label %.split.loop.exit.split.loop.exit13, label %10

10:                                               ; preds = %4
  %.not = icmp eq i64 %5, 0
  br i1 %.not, label %.split.loop.exit, label %4

.split.loop.exit.split.loop.exit13:               ; preds = %4
  %11 = getelementptr inbounds i8, ptr %0, i64 %5
  br label %.split.loop.exit

.split.loop.exit:                                 ; preds = %10, %.split.loop.exit.split.loop.exit13
  %.08 = phi ptr [ %11, %.split.loop.exit.split.loop.exit13 ], [ null, %10 ]
  ret ptr %.08
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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/C++ TBAA"}


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