; LLVM IR from EyalAr/lwip :: src/lib/png (pngset)

; 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.png_info_def = type { i32, i32, i32, i64, ptr, i16, i16, i8, i8, i8, i8, i8, i8, i8, i8, [8 x i8], %struct.png_colorspace, ptr, ptr, i32, i32, i32, ptr, %struct.png_time_struct, %struct.png_color_8_struct, ptr, %struct.png_color_16_struct, %struct.png_color_16_struct, i32, i32, i8, i32, i32, i8, ptr, ptr, i32, i32, ptr, ptr, i8, i8, i32, ptr, i32, ptr, i32, i8, ptr, ptr, ptr }
%struct.png_colorspace = type { i32, %struct.png_xy, %struct.png_XYZ, i16, i16 }
%struct.png_xy = type { i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.png_XYZ = type { i32, i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.png_time_struct = type { i16, i8, i8, i8, i8, i8 }
%struct.png_color_8_struct = type { i8, i8, i8, i8, i8 }
%struct.png_color_16_struct = type { i8, i16, i16, i16, i16 }

; 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 @png_set_hIST(ptr noalias noundef %0, ptr noalias noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %14, label %11

11:                                               ; preds = %3
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = icmp eq ptr %12, null
  br i1 %13, label %14, label %15

14:                                               ; preds = %11, %3
  store i32 1, ptr %8, align 4
  br label %74

15:                                               ; preds = %11
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.png_info_def, ptr %16, i32 0, i32 5
  %18 = load i16, ptr %17, align 8, !tbaa !9
  %19 = zext i16 %18 to i32
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %27, label %21

21:                                               ; preds = %15
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.png_info_def, ptr %22, i32 0, i32 5
  %24 = load i16, ptr %23, align 8, !tbaa !9
  %25 = zext i16 %24 to i32
  %26 = icmp sgt i32 %25, 256
  br i1 %26, label %27, label %29

27:                                               ; preds = %21, %15
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 1, ptr %8, align 4
  br label %74

29:                                               ; preds = %21
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  call void @png_free_data(ptr noundef %30, ptr noundef %31, i32 noundef 8, i32 noundef 0)
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = call noalias ptr @png_malloc_warn(ptr noundef %32, i64 noundef 512)
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.png_info_def, ptr %34, i32 0, i32 34
  store ptr %33, ptr %35, align 8, !tbaa !20
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.png_info_def, ptr %36, i32 0, i32 34
  %38 = load ptr, ptr %37, align 8, !tbaa !20
  %39 = icmp eq ptr %38, null
  br i1 %39, label %40, label %42

40:                                               ; preds = %29
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 1, ptr %8, align 4
  br label %74

42:                                               ; preds = %29
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.png_info_def, ptr %43, i32 0, i32 42
  %45 = load i32, ptr %44, align 4, !tbaa !21
  %46 = or i32 %45, 8
  store i32 %46, ptr %44, align 4, !tbaa !21
  store i32 0, ptr %7, align 4, !tbaa !22
  br label %47

47:                                               ; preds = %66, %42
  %48 = load i32, ptr %7, align 4, !tbaa !22
  %49 = load ptr, ptr %5, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.png_info_def, ptr %49, i32 0, i32 5
  %51 = load i16, ptr %50, align 8, !tbaa !9
  %52 = zext i16 %51 to i32
  %53 = icmp slt i32 %48, %52
  br i1 %53, label %54, label %69

54:                                               ; preds = %47
  %55 = load ptr, ptr %6, align 8, !tbaa !5
  %56 = load i32, ptr %7, align 4, !tbaa !22
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds i16, ptr %55, i64 %57
  %59 = load i16, ptr %58, align 2, !tbaa !23
  %60 = load ptr, ptr %5, align 8, !tbaa !5
  %61 = getelementptr inbounds %struct.png_info_def, ptr %60, i32 0, i32 34
  %62 = load ptr, ptr %61, align 8, !tbaa !20
  %63 = load i32, ptr %7, align 4, !tbaa !22
  %64 = sext i32 %63 to i64
  %65 = getelementptr inbounds i16, ptr %62, i64 %64
  store i16 %59, ptr %65, align 2, !tbaa !23
  br label %66

66:                                               ; preds = %54
  %67 = load i32, ptr %7, align 4, !tbaa !22
  %68 = add nsw i32 %67, 1
  store i32 %68, ptr %7, align 4, !tbaa !22
  br label %47, !llvm.loop !24

69:                                               ; preds = %47
  %70 = load ptr, ptr %5, align 8, !tbaa !5
  %71 = getelementptr inbounds %struct.png_info_def, ptr %70, i32 0, i32 2
  %72 = load i32, ptr %71, align 8, !tbaa !26
  %73 = or i32 %72, 64
  store i32 %73, ptr %71, align 8, !tbaa !26
  store i32 0, ptr %8, align 4
  br label %74

74:                                               ; preds = %69, %40, %27, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %75 = load i32, ptr %8, align 4
  switch i32 %75, label %77 [
    i32 0, label %76
    i32 1, label %76
  ]

76:                                               ; preds = %74, %74
  ret void

77:                                               ; preds = %74
  unreachable
}

declare void @png_free_data(ptr noundef, ptr noundef, i32 noundef, i32 noundef) #2

declare noalias ptr @png_malloc_warn(ptr noundef, i64 noundef) #2

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 = { "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, !13, i64 32}
!10 = !{!"png_info_def", !11, i64 0, !11, i64 4, !11, i64 8, !12, i64 16, !6, i64 24, !13, i64 32, !13, i64 34, !7, i64 36, !7, i64 37, !7, i64 38, !7, i64 39, !7, i64 40, !7, i64 41, !7, i64 42, !7, i64 43, !7, i64 44, !14, i64 52, !6, i64 128, !6, i64 136, !11, i64 144, !11, i64 148, !11, i64 152, !6, i64 160, !17, i64 168, !18, i64 176, !6, i64 184, !19, i64 192, !19, i64 202, !11, i64 212, !11, i64 216, !7, i64 220, !11, i64 224, !11, i64 228, !7, i64 232, !6, i64 240, !6, i64 248, !11, i64 256, !11, i64 260, !6, i64 264, !6, i64 272, !7, i64 280, !7, i64 281, !11, i64 284, !6, i64 288, !11, i64 296, !6, i64 304, !11, i64 312, !7, i64 316, !6, i64 320, !6, i64 328, !6, i64 336}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!"short", !7, i64 0}
!14 = !{!"png_colorspace", !11, i64 0, !15, i64 4, !16, i64 36, !13, i64 72, !13, i64 74}
!15 = !{!"png_xy", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !11, i64 28}
!16 = !{!"png_XYZ", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !11, i64 28, !11, i64 32}
!17 = !{!"png_time_struct", !13, i64 0, !7, i64 2, !7, i64 3, !7, i64 4, !7, i64 5, !7, i64 6}
!18 = !{!"png_color_8_struct", !7, i64 0, !7, i64 1, !7, i64 2, !7, i64 3, !7, i64 4}
!19 = !{!"png_color_16_struct", !7, i64 0, !13, i64 2, !13, i64 4, !13, i64 6, !13, i64 8}
!20 = !{!10, !6, i64 240}
!21 = !{!10, !11, i64 284}
!22 = !{!11, !11, i64 0}
!23 = !{!13, !13, i64 0}
!24 = distinct !{!24, !25}
!25 = !{!"llvm.loop.mustprogress"}
!26 = !{!10, !11, i64 8}


; 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 @png_set_hIST(ptr noalias noundef %0, ptr noalias noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  %5 = icmp eq ptr %1, null
  %or.cond = or i1 %4, %5
  br i1 %or.cond, label %24, label %6

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %1, i64 32
  %8 = load i16, ptr %7, align 8, !tbaa !5
  %9 = add i16 %8, -257
  %or.cond23 = icmp ult i16 %9, -256
  br i1 %or.cond23, label %24, label %10

10:                                               ; preds = %6
  tail call void @png_free_data(ptr noundef nonnull %0, ptr noundef nonnull %1, i32 noundef 8, i32 noundef 0) #3
  %11 = tail call noalias ptr @png_malloc_warn(ptr noundef nonnull %0, i64 noundef 512) #3
  %12 = getelementptr inbounds i8, ptr %1, i64 240
  store ptr %11, ptr %12, align 8, !tbaa !19
  %13 = icmp eq ptr %11, null
  br i1 %13, label %24, label %14

14:                                               ; preds = %10
  %15 = getelementptr inbounds i8, ptr %1, i64 284
  %16 = load i32, ptr %15, align 4, !tbaa !20
  %17 = or i32 %16, 8
  store i32 %17, ptr %15, align 4, !tbaa !20
  %18 = load i16, ptr %7, align 8, !tbaa !5
  %.not = icmp eq i16 %18, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %14
  %19 = zext i16 %18 to i64
  %20 = shl nuw nsw i64 %19, 1
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 2 %11, ptr align 2 %2, i64 %20, i1 false), !tbaa !21
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %14
  %21 = getelementptr inbounds i8, ptr %1, i64 8
  %22 = load i32, ptr %21, align 8, !tbaa !22
  %23 = or i32 %22, 64
  store i32 %23, ptr %21, align 8, !tbaa !22
  br label %24

24:                                               ; preds = %10, %6, %3, %._crit_edge
  ret void
}

declare void @png_free_data(ptr noundef, ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #1

declare noalias ptr @png_malloc_warn(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, 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 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !12, i64 32}
!6 = !{!"png_info_def", !7, i64 0, !7, i64 4, !7, i64 8, !10, i64 16, !11, i64 24, !12, i64 32, !12, i64 34, !8, i64 36, !8, i64 37, !8, i64 38, !8, i64 39, !8, i64 40, !8, i64 41, !8, i64 42, !8, i64 43, !8, i64 44, !13, i64 52, !11, i64 128, !11, i64 136, !7, i64 144, !7, i64 148, !7, i64 152, !11, i64 160, !16, i64 168, !17, i64 176, !11, i64 184, !18, i64 192, !18, i64 202, !7, i64 212, !7, i64 216, !8, i64 220, !7, i64 224, !7, i64 228, !8, i64 232, !11, i64 240, !11, i64 248, !7, i64 256, !7, i64 260, !11, i64 264, !11, i64 272, !8, i64 280, !8, i64 281, !7, i64 284, !11, i64 288, !7, i64 296, !11, i64 304, !7, i64 312, !8, i64 316, !11, i64 320, !11, i64 328, !11, i64 336}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"short", !8, i64 0}
!13 = !{!"png_colorspace", !7, i64 0, !14, i64 4, !15, i64 36, !12, i64 72, !12, i64 74}
!14 = !{!"png_xy", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !7, i64 28}
!15 = !{!"png_XYZ", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !7, i64 28, !7, i64 32}
!16 = !{!"png_time_struct", !12, i64 0, !8, i64 2, !8, i64 3, !8, i64 4, !8, i64 5, !8, i64 6}
!17 = !{!"png_color_8_struct", !8, i64 0, !8, i64 1, !8, i64 2, !8, i64 3, !8, i64 4}
!18 = !{!"png_color_16_struct", !8, i64 0, !12, i64 2, !12, i64 4, !12, i64 6, !12, i64 8}
!19 = !{!6, !11, i64 240}
!20 = !{!6, !7, i64 284}
!21 = !{!12, !12, i64 0}
!22 = !{!6, !7, i64 8}


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