; LLVM IR from yourtion/LearningMasteringAlgorithms-C :: source (ohtbl)

; 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.OHTbl_ = type { i32, ptr, ptr, ptr, ptr, ptr, i32, 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 @ohtbl_destroy(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.OHTbl_, ptr %4, i32 0, i32 5
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %52

8:                                                ; preds = %1
  store i32 0, ptr %3, align 4, !tbaa !12
  br label %9

9:                                                ; preds = %48, %8
  %10 = load i32, ptr %3, align 4, !tbaa !12
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.OHTbl_, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !13
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %15, label %51

15:                                               ; preds = %9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.OHTbl_, ptr %16, i32 0, i32 7
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = load i32, ptr %3, align 4, !tbaa !12
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = icmp ne ptr %22, null
  br i1 %23, label %24, label %47

24:                                               ; preds = %15
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.OHTbl_, ptr %25, i32 0, i32 7
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = load i32, ptr %3, align 4, !tbaa !12
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds ptr, ptr %27, i64 %29
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  %32 = load ptr, ptr %2, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.OHTbl_, ptr %32, i32 0, i32 1
  %34 = load ptr, ptr %33, align 8, !tbaa !15
  %35 = icmp ne ptr %31, %34
  br i1 %35, label %36, label %47

36:                                               ; preds = %24
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.OHTbl_, ptr %37, i32 0, i32 5
  %39 = load ptr, ptr %38, align 8, !tbaa !9
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.OHTbl_, ptr %40, i32 0, i32 7
  %42 = load ptr, ptr %41, align 8, !tbaa !14
  %43 = load i32, ptr %3, align 4, !tbaa !12
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds ptr, ptr %42, i64 %44
  %46 = load ptr, ptr %45, align 8, !tbaa !5
  call void %39(ptr noundef %46)
  br label %47

47:                                               ; preds = %36, %24, %15
  br label %48

48:                                               ; preds = %47
  %49 = load i32, ptr %3, align 4, !tbaa !12
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %3, align 4, !tbaa !12
  br label %9, !llvm.loop !16

51:                                               ; preds = %9
  br label %52

52:                                               ; preds = %51, %1
  %53 = load ptr, ptr %2, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.OHTbl_, ptr %53, i32 0, i32 7
  %55 = load ptr, ptr %54, align 8, !tbaa !14
  call void @free(ptr noundef %55) #4
  %56 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %56, i8 0, i64 64, i1 false)
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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, !6, i64 40}
!10 = !{!"OHTbl_", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !11, i64 48, !6, i64 56}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 0}
!14 = !{!10, !6, i64 56}
!15 = !{!10, !6, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"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
define dso_local void @ohtbl_destroy(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 40
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %4 = load i32, ptr %0, align 8, !tbaa !11
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader
  %6 = getelementptr inbounds i8, ptr %0, i64 56
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  br label %8

8:                                                ; preds = %.lr.ph, %17
  %9 = phi i32 [ %4, %.lr.ph ], [ %18, %17 ]
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %17 ]
  %10 = load ptr, ptr %6, align 8, !tbaa !12
  %11 = getelementptr inbounds ptr, ptr %10, i64 %indvars.iv
  %12 = load ptr, ptr %11, align 8, !tbaa !13
  %.not14 = icmp eq ptr %12, null
  br i1 %.not14, label %17, label %13

13:                                               ; preds = %8
  %14 = load ptr, ptr %7, align 8, !tbaa !14
  %.not15 = icmp eq ptr %12, %14
  br i1 %.not15, label %17, label %15

15:                                               ; preds = %13
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  tail call void %16(ptr noundef nonnull %12) #3
  %.pre = load i32, ptr %0, align 8, !tbaa !11
  br label %17

17:                                               ; preds = %8, %13, %15
  %18 = phi i32 [ %9, %8 ], [ %9, %13 ], [ %.pre, %15 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %19 = sext i32 %18 to i64
  %20 = icmp slt i64 %indvars.iv.next, %19
  br i1 %20, label %8, label %.loopexit, !llvm.loop !15

.loopexit:                                        ; preds = %17, %.preheader, %1
  %21 = getelementptr inbounds i8, ptr %0, i64 56
  %22 = load ptr, ptr %21, align 8, !tbaa !12
  tail call void @free(ptr noundef %22) #3
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) %0, i8 0, i64 64, i1 false)
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress 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 = { 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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, !10, i64 40}
!6 = !{!"OHTbl_", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !7, i64 48, !10, i64 56}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 56}
!13 = !{!10, !10, i64 0}
!14 = !{!6, !10, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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