; LLVM IR from erthink/libmdbx :: src (osal)

; 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 dso_local ptr @osal_fileext(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store ptr null, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %41, %2
  %8 = load i64, ptr %6, align 8, !tbaa !9
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = icmp ult i64 %8, %9
  br i1 %10, label %11, label %18

11:                                               ; preds = %7
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = getelementptr inbounds i8, ptr %12, i64 %13
  %15 = load i8, ptr %14, align 1, !tbaa !11
  %16 = sext i8 %15 to i32
  %17 = icmp ne i32 %16, 0
  br label %18

18:                                               ; preds = %11, %7
  %19 = phi i1 [ false, %7 ], [ %17, %11 ]
  br i1 %19, label %21, label %20

20:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %44

21:                                               ; preds = %18
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i64, ptr %6, align 8, !tbaa !9
  %24 = getelementptr inbounds i8, ptr %22, i64 %23
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = sext i8 %25 to i32
  %27 = icmp eq i32 %26, 46
  br i1 %27, label %28, label %32

28:                                               ; preds = %21
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = getelementptr inbounds i8, ptr %29, i64 %30
  store ptr %31, ptr %5, align 8, !tbaa !5
  br label %40

32:                                               ; preds = %21
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !9
  %35 = getelementptr inbounds i8, ptr %33, i64 %34
  %36 = load i8, ptr %35, align 1, !tbaa !11
  %37 = call zeroext i1 @osal_isdirsep(i8 noundef signext %36)
  br i1 %37, label %38, label %39

38:                                               ; preds = %32
  store ptr null, ptr %5, align 8, !tbaa !5
  br label %39

39:                                               ; preds = %38, %32
  br label %40

40:                                               ; preds = %39, %28
  br label %41

41:                                               ; preds = %40
  %42 = load i64, ptr %6, align 8, !tbaa !9
  %43 = add i64 %42, 1
  store i64 %43, ptr %6, align 8, !tbaa !9
  br label %7, !llvm.loop !12

44:                                               ; preds = %20
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %45
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i1 @osal_isdirsep(i8 noundef signext) #2

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 = { inlinehint 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 }

!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 = !{!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: nounwind uwtable
define dso_local ptr @osal_fileext(ptr noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %7
  %.014 = phi i64 [ %8, %7 ], [ 0, %2 ]
  %.01113 = phi ptr [ %.1, %7 ], [ null, %2 ]
  %3 = getelementptr inbounds i8, ptr %0, i64 %.014
  %4 = load i8, ptr %3, align 1, !tbaa !5
  switch i8 %4, label %5 [
    i8 0, label %.critedge
    i8 46, label %7
  ]

.critedge:                                        ; preds = %7, %.lr.ph, %2
  %.011.lcssa = phi ptr [ null, %2 ], [ %.01113, %.lr.ph ], [ %.1, %7 ]
  ret ptr %.011.lcssa

5:                                                ; preds = %.lr.ph
  %6 = tail call zeroext i1 @osal_isdirsep(i8 noundef signext %4)
  %spec.select = select i1 %6, ptr null, ptr %.01113
  br label %7

7:                                                ; preds = %5, %.lr.ph
  %.1 = phi ptr [ %3, %.lr.ph ], [ %spec.select, %5 ]
  %8 = add nuw i64 %.014, 1
  %exitcond.not = icmp eq i64 %8, %1
  br i1 %exitcond.not, label %.critedge, label %.lr.ph, !llvm.loop !8
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i1 @osal_isdirsep(i8 noundef signext) local_unnamed_addr #1

attributes #0 = { 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 #1 = { inlinehint 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" }

!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"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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