; LLVM IR from fhanau/Efficient-Compression-Tool :: src/optipng (codec)

; 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.opng_codec_context = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, i64, i64, i32, i32, i32, i8 }

declare void @png_destroy_read_struct(ptr noundef, ptr noundef, ptr noundef) #0

declare void @opng_init_image(ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local void @opng_decode_finish(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 = getelementptr inbounds %struct.opng_codec_context, ptr %6, i32 0, i32 4
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = icmp ne ptr %8, null
  br i1 %9, label %11, label %10

10:                                               ; preds = %2
  br label %31

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %18

14:                                               ; preds = %11
  store i32 1, ptr %5, align 4, !tbaa !9
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.opng_codec_context, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !15
  call void @opng_init_image(ptr noundef %17)
  br label %19

18:                                               ; preds = %11
  store i32 2, ptr %5, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %18, %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.opng_codec_context, ptr %20, i32 0, i32 4
  %22 = load ptr, ptr %21, align 8, !tbaa !11
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.opng_codec_context, ptr %23, i32 0, i32 5
  %25 = load ptr, ptr %24, align 8, !tbaa !16
  %26 = load i32, ptr %5, align 4, !tbaa !9
  call void @png_data_freer(ptr noundef %22, ptr noundef %25, i32 noundef %26, i32 noundef 65535)
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.opng_codec_context, ptr %27, i32 0, i32 4
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.opng_codec_context, ptr %29, i32 0, i32 5
  call void @png_destroy_read_struct(ptr noundef %28, ptr noundef %30, ptr noundef null)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %31

31:                                               ; preds = %19, %10
  ret void
}

declare void @png_data_freer(ptr noundef, ptr noundef, i32 noundef, i32 noundef) #0

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"_ZTS18opng_codec_context", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !13, i64 56, !13, i64 64, !10, i64 72, !10, i64 76, !10, i64 80, !14, i64 84}
!13 = !{!"long", !7, i64 0}
!14 = !{!"bool", !7, i64 0}
!15 = !{!12, !6, i64 0}
!16 = !{!12, !6, i64 40}


; 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 @png_destroy_read_struct(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

declare void @opng_init_image(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @opng_decode_finish(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = getelementptr inbounds i8, ptr %0, i64 32
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %12, label %5

5:                                                ; preds = %2
  %.not7 = icmp eq i32 %1, 0
  br i1 %.not7, label %8, label %6

6:                                                ; preds = %5
  %7 = load ptr, ptr %0, align 8, !tbaa !13
  tail call void @opng_init_image(ptr noundef %7)
  %.pre = load ptr, ptr %3, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %5, %6
  %9 = phi ptr [ %.pre, %6 ], [ %4, %5 ]
  %.0 = phi i32 [ 1, %6 ], [ 2, %5 ]
  %10 = getelementptr inbounds i8, ptr %0, i64 40
  %11 = load ptr, ptr %10, align 8, !tbaa !14
  tail call void @png_data_freer(ptr noundef %9, ptr noundef %11, i32 noundef %.0, i32 noundef 65535)
  tail call void @png_destroy_read_struct(ptr noundef nonnull %3, ptr noundef nonnull %10, ptr noundef null)
  br label %12

12:                                               ; preds = %2, %8
  ret void
}

declare void @png_data_freer(ptr noundef, ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

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 = { mustprogress 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" }

!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, !7, i64 32}
!6 = !{!"_ZTS18opng_codec_context", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !10, i64 56, !10, i64 64, !11, i64 72, !11, i64 76, !11, i64 80, !12, i64 84}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!"bool", !8, i64 0}
!13 = !{!6, !7, i64 0}
!14 = !{!6, !7, i64 40}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass