; LLVM IR from ImChong/Practice_LeetCode_C :: F01_Common_Functions/src (common_array)

; 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
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @Array_Free2D(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %43

9:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %36, %9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %39

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds ptr, ptr %17, i64 %19
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %35

23:                                               ; preds = %15
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load ptr, ptr %24, align 8, !tbaa !5
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds ptr, ptr %25, i64 %27
  %29 = load ptr, ptr %28, align 8, !tbaa !5
  call void @free(ptr noundef %29) #3
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds ptr, ptr %31, i64 %33
  store ptr null, ptr %34, align 8, !tbaa !5
  br label %35

35:                                               ; preds = %23, %15
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

39:                                               ; preds = %14
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = load ptr, ptr %40, align 8, !tbaa !5
  call void @free(ptr noundef %41) #3
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr null, ptr %42, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %39, %2
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = distinct !{!11, !12}
!12 = !{!"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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @Array_Free2D(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %13, label %.preheader

.preheader:                                       ; preds = %2
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

._crit_edge.loopexit:                             ; preds = %12
  %.pre = load ptr, ptr %0, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.preheader
  %5 = phi ptr [ %.pre, %._crit_edge.loopexit ], [ %3, %.preheader ]
  tail call void @free(ptr noundef %5) #2
  store ptr null, ptr %0, align 8, !tbaa !5
  br label %13

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %12 ]
  %6 = load ptr, ptr %0, align 8, !tbaa !5
  %7 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %.not12 = icmp eq ptr %8, null
  br i1 %.not12, label %12, label %9

9:                                                ; preds = %.lr.ph
  tail call void @free(ptr noundef nonnull %8) #2
  %10 = load ptr, ptr %0, align 8, !tbaa !5
  %11 = getelementptr inbounds ptr, ptr %10, i64 %indvars.iv
  store ptr null, ptr %11, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %.lr.ph, %9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9

13:                                               ; preds = %._crit_edge, %2
  ret i32 0
}

attributes #0 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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