; LLVM IR from JayXon/Leanify :: lib/zopfli (lz77)

; 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.ZopfliLZ77Store = type { ptr, ptr, i64, ptr, ptr, ptr, ptr, 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

; Function Attrs: nounwind uwtable
define dso_local i64 @ZopfliLZ77GetByteRange(ptr noundef %0, i64 noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load i64, ptr %7, align 8, !tbaa !9
  %11 = sub i64 %10, 1
  store i64 %11, ptr %8, align 8, !tbaa !9
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = load i64, ptr %7, align 8, !tbaa !9
  %14 = icmp eq i64 %12, %13
  br i1 %14, label %15, label %16

15:                                               ; preds = %3
  store i64 0, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %51

16:                                               ; preds = %3
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.ZopfliLZ77Store, ptr %17, i32 0, i32 4
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = load i64, ptr %8, align 8, !tbaa !9
  %21 = getelementptr inbounds i64, ptr %19, i64 %20
  %22 = load i64, ptr %21, align 8, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.ZopfliLZ77Store, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = getelementptr inbounds i16, ptr %25, i64 %26
  %28 = load i16, ptr %27, align 2, !tbaa !14
  %29 = zext i16 %28 to i32
  %30 = icmp eq i32 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %16
  br label %40

32:                                               ; preds = %16
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.ZopfliLZ77Store, ptr %33, i32 0, i32 0
  %35 = load ptr, ptr %34, align 8, !tbaa !16
  %36 = load i64, ptr %8, align 8, !tbaa !9
  %37 = getelementptr inbounds i16, ptr %35, i64 %36
  %38 = load i16, ptr %37, align 2, !tbaa !14
  %39 = zext i16 %38 to i32
  br label %40

40:                                               ; preds = %32, %31
  %41 = phi i32 [ 1, %31 ], [ %39, %32 ]
  %42 = sext i32 %41 to i64
  %43 = add i64 %22, %42
  %44 = load ptr, ptr %5, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.ZopfliLZ77Store, ptr %44, i32 0, i32 4
  %46 = load ptr, ptr %45, align 8, !tbaa !11
  %47 = load i64, ptr %6, align 8, !tbaa !9
  %48 = getelementptr inbounds i64, ptr %46, i64 %47
  %49 = load i64, ptr %48, align 8, !tbaa !9
  %50 = sub i64 %43, %49
  store i64 %50, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %51

51:                                               ; preds = %40, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %52 = load i64, ptr %4, align 8
  ret i64 %52
}

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 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"ZopfliLZ77Store", !6, i64 0, !6, i64 8, !10, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !15, i64 0}
!15 = !{!"short", !7, i64 0}
!16 = !{!12, !6, i64 0}


; 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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local i64 @ZopfliLZ77GetByteRange(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = add i64 %2, -1
  %5 = icmp eq i64 %1, %2
  br i1 %5, label %27, label %6

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %0, i64 32
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = getelementptr inbounds i64, ptr %8, i64 %4
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  %13 = getelementptr inbounds i16, ptr %12, i64 %4
  %14 = load i16, ptr %13, align 2, !tbaa !13
  %15 = icmp eq i16 %14, 0
  br i1 %15, label %21, label %16

16:                                               ; preds = %6
  %17 = load ptr, ptr %0, align 8, !tbaa !15
  %18 = getelementptr inbounds i16, ptr %17, i64 %4
  %19 = load i16, ptr %18, align 2, !tbaa !13
  %20 = zext i16 %19 to i64
  br label %21

21:                                               ; preds = %6, %16
  %22 = phi i64 [ %20, %16 ], [ 1, %6 ]
  %23 = add i64 %22, %10
  %24 = getelementptr inbounds i64, ptr %8, i64 %1
  %25 = load i64, ptr %24, align 8, !tbaa !11
  %26 = sub i64 %23, %25
  br label %27

27:                                               ; preds = %3, %21
  %.0 = phi i64 [ %26, %21 ], [ 0, %3 ]
  ret i64 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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 = !{!"ZopfliLZ77Store", !7, i64 0, !7, i64 8, !10, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!10, !10, i64 0}
!12 = !{!6, !7, i64 8}
!13 = !{!14, !14, i64 0}
!14 = !{!"short", !8, i64 0}
!15 = !{!6, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass