; LLVM IR from ryansturmer/thinfat32 :: src (thinfat32)

; 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
declare dso_local i32 @tf_get_fat_entry(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @tf_set_fat_entry(i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @tf_free_clusterchain(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = call i32 @tf_get_fat_entry(i32 noundef %4)
  store i32 %5, ptr %3, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %13, %1
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = icmp ult i32 %7, 268435448
  br i1 %8, label %9, label %19

9:                                                ; preds = %6
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp ule i32 %10, 2
  br i1 %11, label %12, label %13

12:                                               ; preds = %9
  br label %19

13:                                               ; preds = %9
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = call i32 @tf_set_fat_entry(i32 noundef %14, i32 noundef 0)
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = call i32 @tf_get_fat_entry(i32 noundef %16)
  store i32 %17, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %18, ptr %2, align 4, !tbaa !5
  br label %6, !llvm.loop !9

19:                                               ; preds = %12, %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 0
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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
declare dso_local i32 @tf_get_fat_entry(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @tf_set_fat_entry(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @tf_free_clusterchain(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @tf_get_fat_entry(i32 noundef %0)
  %3 = add i32 %2, -268435448
  %or.cond8 = icmp ult i32 %3, -268435445
  br i1 %or.cond8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.010 = phi i32 [ %5, %.lr.ph ], [ %2, %1 ]
  %.079 = phi i32 [ %5, %.lr.ph ], [ %0, %1 ]
  %4 = tail call i32 @tf_set_fat_entry(i32 noundef %.079, i32 noundef 0)
  %5 = tail call i32 @tf_get_fat_entry(i32 noundef %.010)
  %6 = add i32 %5, -268435448
  %or.cond = icmp ult i32 %6, -268435445
  br i1 %or.cond, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret i32 0
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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