; LLVM IR from microsoft/LightAIMD :: src (json)

; 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.json = type { ptr, i64, i64, 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

declare void @x_free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @json_free(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.json, ptr %5, i32 0, i32 2
  %7 = load i64, ptr %6, align 8, !tbaa !9
  %8 = icmp eq i64 %7, 4
  br i1 %8, label %14, label %9

9:                                                ; preds = %1
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.json, ptr %10, i32 0, i32 2
  %12 = load i64, ptr %11, align 8, !tbaa !9
  %13 = icmp eq i64 %12, 5
  br i1 %13, label %14, label %28

14:                                               ; preds = %9, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.json, ptr %15, i32 0, i32 3
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  store ptr %17, ptr %3, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %21, %14
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %27

21:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.json, ptr %22, i32 0, i32 4
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  store ptr %24, ptr %4, align 8, !tbaa !5
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  call void @json_free(ptr noundef %25)
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %26, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %18, !llvm.loop !14

27:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %28

28:                                               ; preds = %27, %9
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  call void @x_free(ptr noundef %29)
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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, !11, i64 16}
!10 = !{!"json", !6, i64 0, !11, i64 8, !11, i64 16, !6, i64 24, !6, i64 32}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !6, i64 24}
!13 = !{!10, !6, i64 32}
!14 = distinct !{!14, !15}
!15 = !{!"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"

declare void @x_free(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @json_free(ptr noundef %0) local_unnamed_addr #1 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = and i64 %3, -2
  %switch = icmp eq i64 %4, 4
  br i1 %switch, label %5, label %.loopexit

5:                                                ; preds = %1
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %.not9 = icmp eq ptr %7, null
  br i1 %.not9, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %5, %.lr.ph
  %.010 = phi ptr [ %9, %.lr.ph ], [ %7, %5 ]
  %8 = getelementptr inbounds i8, ptr %.010, i64 32
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  tail call void @json_free(ptr noundef nonnull %.010)
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %5, %1
  tail call void @x_free(ptr noundef %0) #2
  ret void
}

attributes #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 = { 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, !10, i64 16}
!6 = !{!"json", !7, i64 0, !10, i64 8, !10, i64 16, !7, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 24}
!12 = !{!6, !7, i64 32}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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