; LLVM IR from indygreg/python-zstandard :: zstd (zstd)

; 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.ZSTD_parameters = type { %struct.ZSTD_compressionParameters, %struct.ZSTD_frameParameters }
%struct.ZSTD_compressionParameters = type { i32, i32, i32, i32, i32, i32, i32 }
%struct.ZSTD_frameParameters = type { i32, i32, i32 }

; Function Attrs: nounwind uwtable
declare hidden i32 @ERR_isError(i64 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: nounwind uwtable
define dso_local i64 @ZSTD_CCtxParams_init_advanced(ptr noundef %0, ptr noundef byval(%struct.ZSTD_parameters) align 8 %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %19, label %10

10:                                               ; preds = %7
  br label %11

11:                                               ; preds = %10
  br label %12

12:                                               ; preds = %11
  br label %13

13:                                               ; preds = %12
  br label %14

14:                                               ; preds = %13
  br label %15

15:                                               ; preds = %14
  br label %16

16:                                               ; preds = %15
  br label %17

17:                                               ; preds = %16
  br label %18

18:                                               ; preds = %17
  store i64 -1, ptr %3, align 8
  br label %47

19:                                               ; preds = %7
  br label %20

20:                                               ; preds = %19
  br label %21

21:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %22 = getelementptr inbounds %struct.ZSTD_parameters, ptr %1, i32 0, i32 0
  %23 = call i64 @ZSTD_checkCParams(ptr noundef byval(%struct.ZSTD_compressionParameters) align 8 %22)
  store i64 %23, ptr %5, align 8, !tbaa !9
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = call i32 @ERR_isError(i64 noundef %24)
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %41

27:                                               ; preds = %21
  br label %28

28:                                               ; preds = %27
  br label %29

29:                                               ; preds = %28
  br label %30

30:                                               ; preds = %29
  br label %31

31:                                               ; preds = %30
  br label %32

32:                                               ; preds = %31
  br label %33

33:                                               ; preds = %32
  br label %34

34:                                               ; preds = %33
  br label %35

35:                                               ; preds = %34
  br label %36

36:                                               ; preds = %35
  br label %37

37:                                               ; preds = %36
  br label %38

38:                                               ; preds = %37
  br label %39

39:                                               ; preds = %38
  %40 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %40, ptr %3, align 8
  store i32 1, ptr %6, align 4
  br label %42

41:                                               ; preds = %21
  store i32 0, ptr %6, align 4
  br label %42

42:                                               ; preds = %41, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  %43 = load i32, ptr %6, align 4
  switch i32 %43, label %49 [
    i32 0, label %44
    i32 1, label %47
  ]

44:                                               ; preds = %42
  br label %45

45:                                               ; preds = %44
  %46 = load ptr, ptr %4, align 8, !tbaa !5
  call void @ZSTD_CCtxParams_init_internal(ptr noundef %46, ptr noundef %1, i32 noundef 0)
  store i64 0, ptr %3, align 8
  br label %47

47:                                               ; preds = %45, %42, %18
  %48 = load i64, ptr %3, align 8
  ret i64 %48

49:                                               ; preds = %42
  unreachable
}

; Function Attrs: nounwind uwtable
declare dso_local i64 @ZSTD_checkCParams(ptr noundef byval(%struct.ZSTD_compressionParameters) align 8) #0

; Function Attrs: nounwind uwtable
declare hidden void @ZSTD_CCtxParams_init_internal(ptr noundef, ptr noundef, i32 noundef) #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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"

%struct.ZSTD_parameters = type { %struct.ZSTD_compressionParameters, %struct.ZSTD_frameParameters }
%struct.ZSTD_compressionParameters = type { i32, i32, i32, i32, i32, i32, i32 }
%struct.ZSTD_frameParameters = type { i32, i32, i32 }

; Function Attrs: nounwind uwtable
declare hidden i32 @ERR_isError(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i64 @ZSTD_CCtxParams_init_advanced(ptr noundef %0, ptr noundef byval(%struct.ZSTD_parameters) align 8 %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %7, label %3

3:                                                ; preds = %2
  %4 = tail call i64 @ZSTD_checkCParams(ptr noundef nonnull byval(%struct.ZSTD_compressionParameters) align 8 %1)
  %5 = tail call i32 @ERR_isError(i64 noundef %4)
  %.not7.not = icmp eq i32 %5, 0
  br i1 %.not7.not, label %6, label %7

6:                                                ; preds = %3
  call void @ZSTD_CCtxParams_init_internal(ptr noundef nonnull %0, ptr noundef nonnull %1, i32 noundef 0)
  br label %7

7:                                                ; preds = %3, %2, %6
  %.1 = phi i64 [ %4, %3 ], [ 0, %6 ], [ -1, %2 ]
  ret i64 %.1
}

; Function Attrs: nounwind uwtable
declare dso_local i64 @ZSTD_checkCParams(ptr noundef byval(%struct.ZSTD_compressionParameters) align 8) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @ZSTD_CCtxParams_init_internal(ptr noundef, ptr noundef, i32 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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass