; LLVM IR from EyalAr/lwip :: src/lib/gif (gifalloc)

; 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.ExtensionBlock = type { i32, ptr, i32 }

; 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 void @GifFreeExtensions(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i32 1, ptr %6, align 4
  br label %35

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  store ptr %13, ptr %5, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %27, %11
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds %struct.ExtensionBlock, ptr %17, i64 %20
  %22 = icmp ult ptr %15, %21
  br i1 %22, label %23, label %30

23:                                               ; preds = %14
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.ExtensionBlock, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  call void @free(ptr noundef %26) #3
  br label %27

27:                                               ; preds = %23
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.ExtensionBlock, ptr %28, i32 1
  store ptr %29, ptr %5, align 8, !tbaa !5
  br label %14, !llvm.loop !13

30:                                               ; preds = %14
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load ptr, ptr %31, align 8, !tbaa !5
  call void @free(ptr noundef %32) #3
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr null, ptr %33, align 8, !tbaa !5
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  store i32 0, ptr %34, align 4, !tbaa !9
  store i32 0, ptr %6, align 4
  br label %35

35:                                               ; preds = %30, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %36 = load i32, ptr %6, align 4
  switch i32 %36, label %38 [
    i32 0, label %37
    i32 1, label %37
  ]

37:                                               ; preds = %35, %35
  ret void

38:                                               ; preds = %35
  unreachable
}

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 = !{!12, !6, i64 8}
!12 = !{!"ExtensionBlock", !10, i64 0, !6, i64 8, !10, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"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"

%struct.ExtensionBlock = type { i32, ptr, i32 }

; 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 void @GifFreeExtensions(ptr nocapture noundef %0, ptr nocapture noundef %1) local_unnamed_addr #1 {
  %3 = load ptr, ptr %1, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %15, label %.preheader

.preheader:                                       ; preds = %2
  %5 = load i32, ptr %0, align 4, !tbaa !9
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.011 = phi ptr [ %9, %.lr.ph ], [ %3, %.preheader ]
  %7 = getelementptr inbounds i8, ptr %.011, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  tail call void @free(ptr noundef %8) #2
  %9 = getelementptr inbounds i8, ptr %.011, i64 24
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  %11 = load i32, ptr %0, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds %struct.ExtensionBlock, ptr %10, i64 %12
  %14 = icmp ult ptr %9, %13
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  %.lcssa = phi ptr [ %3, %.preheader ], [ %10, %.lr.ph ]
  tail call void @free(ptr noundef %.lcssa) #2
  store ptr null, ptr %1, align 8, !tbaa !5
  store i32 0, ptr %0, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %2, %._crit_edge
  ret void
}

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"ExtensionBlock", !10, i64 0, !6, i64 8, !10, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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