; LLVM IR from kala13x/libxutils :: src/data (str)

; 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 willreturn memory(read)
declare i32 @strncmp(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @xstrncmpn(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #2 {
  %5 = alloca i8, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %19

13:                                               ; preds = %4
  %14 = load ptr, ptr %8, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %19

16:                                               ; preds = %13
  %17 = load i64, ptr %7, align 8, !tbaa !9
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %20, label %19

19:                                               ; preds = %16, %13, %4
  store i8 0, ptr %5, align 1
  br label %35

20:                                               ; preds = %16
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = load i64, ptr %9, align 8, !tbaa !9
  %23 = icmp eq i64 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i8 0, ptr %5, align 1
  br label %35

25:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = load i64, ptr %9, align 8, !tbaa !9
  %29 = call i32 @strncmp(ptr noundef %26, ptr noundef %27, i64 noundef %28) #4
  store i32 %29, ptr %10, align 4, !tbaa !11
  %30 = load i32, ptr %10, align 4, !tbaa !11
  %31 = icmp ne i32 %30, 0
  %32 = zext i1 %31 to i64
  %33 = select i1 %31, i32 0, i32 1
  %34 = trunc i32 %33 to i8
  store i8 %34, ptr %5, align 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %35

35:                                               ; preds = %25, %24, %19
  %36 = load i8, ptr %5, align 1
  ret i8 %36
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind willreturn memory(read) "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 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 #3 = { nounwind }
attributes #4 = { nounwind willreturn memory(read) }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strncmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read) uwtable
define dso_local zeroext range(i8 0, 2) i8 @xstrncmpn(ptr noundef readonly %0, i64 noundef %1, ptr noundef readonly %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = icmp ne ptr %0, null
  %6 = icmp ne ptr %2, null
  %or.cond = and i1 %5, %6
  %7 = icmp ne i64 %1, 0
  %or.cond3 = and i1 %7, %or.cond
  %8 = icmp eq i64 %1, %3
  %or.cond16 = and i1 %8, %or.cond3
  br i1 %or.cond16, label %9, label %12

9:                                                ; preds = %4
  %10 = tail call i32 @strncmp(ptr noundef nonnull %0, ptr noundef nonnull %2, i64 noundef %1) #2
  %.not = icmp eq i32 %10, 0
  %11 = zext i1 %.not to i8
  br label %12

12:                                               ; preds = %4, %9
  %.0 = phi i8 [ %11, %9 ], [ 0, %4 ]
  ret i8 %.0
}

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 #1 = { mustprogress nofree nounwind willreturn 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" }
attributes #2 = { nounwind willreturn memory(read) }

!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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass