; LLVM IR from holzschu/ios_system :: text_cmds/csplit (csplit)

; 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"

@prefix = external dso_local global ptr, align 8
@sufflen = external dso_local global i64, align 8
@doclean = external dso_local global i32, align 4
@nfiles = external dso_local global i64, align 8
@.str.17 = external hidden unnamed_addr constant [8 x i8], align 1

; 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 void @cleanup() #1 {
  %1 = alloca [4096 x i8], align 16
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4096, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %4 = load i32, ptr @doclean, align 4, !tbaa !5
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %7, label %6

6:                                                ; preds = %0
  store i32 1, ptr %3, align 4
  br label %25

7:                                                ; preds = %0
  store i64 0, ptr %2, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %21, %7
  %9 = load i64, ptr %2, align 8, !tbaa !9
  %10 = load i64, ptr @nfiles, align 8, !tbaa !9
  %11 = icmp slt i64 %9, %10
  br i1 %11, label %12, label %24

12:                                               ; preds = %8
  %13 = getelementptr inbounds [4096 x i8], ptr %1, i64 0, i64 0
  %14 = load ptr, ptr @prefix, align 8, !tbaa !11
  %15 = load i64, ptr @sufflen, align 8, !tbaa !9
  %16 = trunc i64 %15 to i32
  %17 = load i64, ptr %2, align 8, !tbaa !9
  %18 = call i32 (ptr, i64, ptr, ...) @snprintf(ptr noundef %13, i64 noundef 4096, ptr noundef @.str.17, ptr noundef %14, i32 noundef %16, i64 noundef %17) #3
  %19 = getelementptr inbounds [4096 x i8], ptr %1, i64 0, i64 0
  %20 = call i32 @unlink(ptr noundef %19) #3
  br label %21

21:                                               ; preds = %12
  %22 = load i64, ptr %2, align 8, !tbaa !9
  %23 = add nsw i64 %22, 1
  store i64 %23, ptr %2, align 8, !tbaa !9
  br label %8, !llvm.loop !13

24:                                               ; preds = %8
  store i32 0, ptr %3, align 4
  br label %25

25:                                               ; preds = %24, %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4096, ptr %1) #3
  %26 = load i32, ptr %3, align 4
  switch i32 %26, label %28 [
    i32 0, label %27
    i32 1, label %27
  ]

27:                                               ; preds = %25, %25
  ret void

28:                                               ; preds = %25
  unreachable
}

; Function Attrs: nounwind
declare i32 @snprintf(ptr noundef, i64 noundef, ptr noundef, ...) #2

; Function Attrs: nounwind
declare i32 @unlink(ptr noundef) #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 = { nounwind "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 = !{!"int", !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 = !{!"any pointer", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

@prefix = external dso_local local_unnamed_addr global ptr, align 8
@sufflen = external dso_local local_unnamed_addr global i64, align 8
@doclean = external dso_local local_unnamed_addr global i32, align 4
@nfiles = external dso_local local_unnamed_addr global i64, align 8
@.str.17 = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nofree nounwind uwtable
define dso_local void @cleanup() local_unnamed_addr #1 {
  %1 = alloca [4096 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 4096, ptr nonnull %1) #3
  %2 = load i32, ptr @doclean, align 4, !tbaa !5
  %.not = icmp ne i32 %2, 0
  %3 = load i64, ptr @nfiles, align 8
  %4 = icmp sgt i64 %3, 0
  %or.cond = select i1 %.not, i1 %4, i1 false
  br i1 %or.cond, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.03 = phi i64 [ %10, %.lr.ph ], [ 0, %0 ]
  %5 = load ptr, ptr @prefix, align 8, !tbaa !9
  %6 = load i64, ptr @sufflen, align 8, !tbaa !11
  %7 = trunc i64 %6 to i32
  %8 = call i32 (ptr, i64, ptr, ...) @snprintf(ptr noundef nonnull dereferenceable(1) %1, i64 noundef 4096, ptr noundef nonnull @.str.17, ptr noundef %5, i32 noundef %7, i64 noundef %.03) #3
  %9 = call i32 @unlink(ptr noundef nonnull %1) #3
  %10 = add nuw nsw i64 %.03, 1
  %11 = load i64, ptr @nfiles, align 8, !tbaa !11
  %12 = icmp slt i64 %10, %11
  br i1 %12, label %.lr.ph, label %.loopexit, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %0
  call void @llvm.lifetime.end.p0(i64 4096, ptr nonnull %1) #3
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @snprintf(ptr noalias nocapture noundef writeonly, i64 noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @unlink(ptr nocapture noundef readonly) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nofree 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 = { nofree nounwind "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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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