; LLVM IR from catid/Zpng :: zstd (zstd_decompress)

; 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"

; 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
declare hidden i32 @ERR_isError(i64 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i64 @ZSTD_decompressBegin(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @ZSTD_decompressBegin_usingDict(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = call i64 @ZSTD_decompressBegin(ptr noundef %11)
  store i64 %12, ptr %8, align 8, !tbaa !9
  %13 = load i64, ptr %8, align 8, !tbaa !9
  %14 = call i32 @ERR_isError(i64 noundef %13)
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %18

16:                                               ; preds = %3
  %17 = load i64, ptr %8, align 8, !tbaa !9
  store i64 %17, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %19

18:                                               ; preds = %3
  store i32 0, ptr %9, align 4
  br label %19

19:                                               ; preds = %18, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %20 = load i32, ptr %9, align 4
  switch i32 %20, label %43 [
    i32 0, label %21
    i32 1, label %41
  ]

21:                                               ; preds = %19
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = icmp ne ptr %22, null
  br i1 %23, label %24, label %40

24:                                               ; preds = %21
  %25 = load i64, ptr %7, align 8, !tbaa !9
  %26 = icmp ne i64 %25, 0
  br i1 %26, label %27, label %40

27:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load i64, ptr %7, align 8, !tbaa !9
  %31 = call i64 @ZSTD_decompress_insertDictionary(ptr noundef %28, ptr noundef %29, i64 noundef %30)
  store i64 %31, ptr %10, align 8, !tbaa !9
  %32 = load i64, ptr %10, align 8, !tbaa !9
  %33 = call i32 @ERR_isError(i64 noundef %32)
  %34 = icmp ne i32 %33, 0
  br i1 %34, label %35, label %36

35:                                               ; preds = %27
  store i64 -30, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %37

36:                                               ; preds = %27
  store i32 0, ptr %9, align 4
  br label %37

37:                                               ; preds = %36, %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  %38 = load i32, ptr %9, align 4
  switch i32 %38, label %43 [
    i32 0, label %39
    i32 1, label %41
  ]

39:                                               ; preds = %37
  br label %40

40:                                               ; preds = %39, %24, %21
  store i64 0, ptr %4, align 8
  br label %41

41:                                               ; preds = %40, %37, %19
  %42 = load i64, ptr %4, align 8
  ret i64 %42

43:                                               ; preds = %37, %19
  unreachable
}

; Function Attrs: nounwind uwtable
declare hidden i64 @ZSTD_decompress_insertDictionary(ptr noundef, ptr noundef, i64 noundef) #1

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}


; 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
declare hidden i32 @ERR_isError(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i64 @ZSTD_decompressBegin(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i64 @ZSTD_decompressBegin_usingDict(ptr noundef %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = tail call i64 @ZSTD_decompressBegin(ptr noundef %0)
  %5 = tail call i32 @ERR_isError(i64 noundef %4)
  %.not.not = icmp eq i32 %5, 0
  br i1 %.not.not, label %6, label %13

6:                                                ; preds = %3
  %7 = icmp ne ptr %1, null
  %8 = icmp ne i64 %2, 0
  %or.cond = and i1 %7, %8
  br i1 %or.cond, label %9, label %12

9:                                                ; preds = %6
  %10 = tail call i64 @ZSTD_decompress_insertDictionary(ptr noundef %0, ptr noundef nonnull %1, i64 noundef %2)
  %11 = tail call i32 @ERR_isError(i64 noundef %10)
  %.not15.not = icmp eq i32 %11, 0
  br i1 %.not15.not, label %12, label %13

12:                                               ; preds = %9, %6
  br label %13

13:                                               ; preds = %9, %3, %12
  %.2 = phi i64 [ %4, %3 ], [ -30, %9 ], [ 0, %12 ]
  ret i64 %.2
}

; Function Attrs: nounwind uwtable
declare hidden i64 @ZSTD_decompress_insertDictionary(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #0

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" }

!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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass