; LLVM IR from csviragh/robotsim :: src/utilities (file_utils)

; 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: nounwind willreturn memory(none)
declare ptr @__ctype_b_loc() #0

; Function Attrs: nounwind uwtable
define dso_local ptr @LSkip(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %22, %1
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = load i8, ptr %4, align 1, !tbaa !9
  %6 = sext i8 %5 to i32
  %7 = icmp ne i32 %6, 0
  br i1 %7, label %8, label %20

8:                                                ; preds = %3
  %9 = call ptr @__ctype_b_loc() #2
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !9
  %13 = sext i8 %12 to i32
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds i16, ptr %10, i64 %14
  %16 = load i16, ptr %15, align 2, !tbaa !10
  %17 = zext i16 %16 to i32
  %18 = and i32 %17, 8192
  %19 = icmp ne i32 %18, 0
  br label %20

20:                                               ; preds = %8, %3
  %21 = phi i1 [ false, %3 ], [ %19, %8 ]
  br i1 %21, label %22, label %25

22:                                               ; preds = %20
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds i8, ptr %23, i32 1
  store ptr %24, ptr %2, align 8, !tbaa !5
  br label %3, !llvm.loop !12

25:                                               ; preds = %20
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  ret ptr %26
}

attributes #0 = { nounwind willreturn memory(none) "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 = { 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 willreturn memory(none) }

!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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !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: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__ctype_b_loc() local_unnamed_addr #0

; Function Attrs: nofree nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @LSkip(ptr noundef readonly %0) local_unnamed_addr #1 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %.not6 = icmp eq i8 %2, 0
  br i1 %.not6, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %3 = tail call ptr @__ctype_b_loc() #2
  %4 = load ptr, ptr %3, align 8, !tbaa !8
  br label %5

5:                                                ; preds = %.lr.ph, %11
  %6 = phi i8 [ %2, %.lr.ph ], [ %13, %11 ]
  %.07 = phi ptr [ %0, %.lr.ph ], [ %12, %11 ]
  %7 = sext i8 %6 to i64
  %8 = getelementptr inbounds i16, ptr %4, i64 %7
  %9 = load i16, ptr %8, align 2, !tbaa !10
  %10 = and i16 %9, 8192
  %.not5 = icmp eq i16 %10, 0
  br i1 %.not5, label %.critedge, label %11

11:                                               ; preds = %5
  %12 = getelementptr inbounds i8, ptr %.07, i64 1
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %.not = icmp eq i8 %13, 0
  br i1 %.not, label %.critedge, label %5, !llvm.loop !12

.critedge:                                        ; preds = %5, %11, %1
  %.0.lcssa = phi ptr [ %0, %1 ], [ %12, %11 ], [ %.07, %5 ]
  ret ptr %.0.lcssa
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 = { nofree nosync nounwind memory(read, inaccessiblemem: none) 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(none) }

!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 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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