; 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"

@xstrfill.sRetVal = external hidden global [8192 x i8], align 16

; 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 @xstrfill(i64 noundef %0, i8 noundef signext %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i8, align 1
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i8 %1, ptr %4, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @xstrnul(ptr noundef @xstrfill.sRetVal)
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp ult i64 %7, 8191
  br i1 %8, label %9, label %11

9:                                                ; preds = %2
  %10 = load i64, ptr %3, align 8, !tbaa !5
  br label %12

11:                                               ; preds = %2
  br label %12

12:                                               ; preds = %11, %9
  %13 = phi i64 [ %10, %9 ], [ 8191, %11 ]
  store i64 %13, ptr %5, align 8, !tbaa !5
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %21, %12
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %18, label %24

18:                                               ; preds = %14
  %19 = load i64, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds [8192 x i8], ptr @xstrfill.sRetVal, i64 0, i64 %19
  store i8 32, ptr %20, align 1, !tbaa !9
  br label %21

21:                                               ; preds = %18
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = add i64 %22, 1
  store i64 %23, ptr %6, align 8, !tbaa !5
  br label %14, !llvm.loop !10

24:                                               ; preds = %14
  %25 = load i64, ptr %6, align 8, !tbaa !5
  %26 = getelementptr inbounds [8192 x i8], ptr @xstrfill.sRetVal, i64 0, i64 %25
  store i8 0, ptr %26, align 1, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr @xstrfill.sRetVal
}

; Function Attrs: nounwind uwtable
declare dso_local void @xstrnul(ptr noundef) #1

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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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"

@xstrfill.sRetVal = external hidden global [8192 x i8], align 16

; Function Attrs: nounwind uwtable
define dso_local noundef nonnull ptr @xstrfill(i64 noundef %0, i8 noundef signext %1) local_unnamed_addr #0 {
  tail call void @xstrnul(ptr noundef nonnull @xstrfill.sRetVal)
  %.not = icmp eq i64 %0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %3 = tail call i64 @llvm.umin.i64(i64 %0, i64 8191)
  tail call void @llvm.memset.p0.i64(ptr nonnull align 16 @xstrfill.sRetVal, i8 32, i64 %3, i1 false), !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %2
  %.0.lcssa = phi i64 [ 0, %2 ], [ %3, %.lr.ph.preheader ]
  %4 = getelementptr inbounds [8192 x i8], ptr @xstrfill.sRetVal, i64 0, i64 %.0.lcssa
  store i8 0, ptr %4, align 1, !tbaa !5
  ret ptr @xstrfill.sRetVal
}

; Function Attrs: nounwind uwtable
declare dso_local void @xstrnul(ptr noundef) local_unnamed_addr #0

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass