; LLVM IR from hutusi/rethink-c :: src (hash_table)

; 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"

%struct._HashTable = type { ptr, i32, ptr, ptr, ptr, ptr, i32, i32 }
%struct._HashTableEntity = type { ptr, ptr, ptr }

; 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 @hash_table_free(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %32, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct._HashTable, ptr %8, i32 0, i32 6
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = icmp ult i32 %7, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %35

13:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct._HashTable, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds ptr, ptr %16, i64 %18
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  store ptr %20, ptr %4, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %24, %13
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = icmp ne ptr %22, null
  br i1 %23, label %24, label %31

24:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %25, ptr %5, align 8, !tbaa !5
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._HashTableEntity, ptr %26, i32 0, i32 2
  %28 = load ptr, ptr %27, align 8, !tbaa !14
  store ptr %28, ptr %4, align 8, !tbaa !5
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  call void @hash_table_free_entity(ptr noundef %29, ptr noundef %30)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %21, !llvm.loop !16

31:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %3, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !18

35:                                               ; preds = %12
  %36 = load ptr, ptr %2, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct._HashTable, ptr %36, i32 0, i32 0
  %38 = load ptr, ptr %37, align 8, !tbaa !13
  call void @free(ptr noundef %38) #3
  %39 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %39) #3
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @hash_table_free_entity(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind
declare void @free(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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 48}
!12 = !{!"_HashTable", !6, i64 0, !10, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !10, i64 48, !10, i64 52}
!13 = !{!12, !6, i64 0}
!14 = !{!15, !6, i64 16}
!15 = !{!"_HashTableEntity", !6, i64 0, !6, i64 8, !6, i64 16}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !17}


; 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 void @hash_table_free(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 48
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %.not18 = icmp eq i32 %3, 0
  br i1 %.not18, label %._crit_edge17, label %.lr.ph16

._crit_edge17:                                    ; preds = %._crit_edge, %1
  %4 = load ptr, ptr %0, align 8, !tbaa !11
  tail call void @free(ptr noundef %4) #2
  tail call void @free(ptr noundef nonnull %0) #2
  ret void

.lr.ph16:                                         ; preds = %1, %._crit_edge
  %5 = phi i32 [ %11, %._crit_edge ], [ %3, %1 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %._crit_edge ], [ 0, %1 ]
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %7 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv
  %8 = load ptr, ptr %7, align 8, !tbaa !12
  %.not12 = icmp eq ptr %8, null
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph16, %.lr.ph
  %.01113 = phi ptr [ %10, %.lr.ph ], [ %8, %.lr.ph16 ]
  %9 = getelementptr inbounds i8, ptr %.01113, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !13
  tail call void @hash_table_free_entity(ptr noundef nonnull %0, ptr noundef nonnull %.01113)
  %.not = icmp eq ptr %10, null
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !15

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load i32, ptr %2, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph16
  %11 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %5, %.lr.ph16 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = zext i32 %11 to i64
  %13 = icmp ult i64 %indvars.iv.next, %12
  br i1 %13, label %.lr.ph16, label %._crit_edge17, !llvm.loop !17
}

; Function Attrs: nounwind uwtable
declare hidden void @hash_table_free_entity(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) 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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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, !10, i64 48}
!6 = !{!"_HashTable", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !10, i64 48, !10, i64 52}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !7, i64 16}
!14 = !{!"_HashTableEntity", !7, i64 0, !7, i64 8, !7, i64 16}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !16}


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