; LLVM IR from catid/Zpng :: zstd (fse_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"

%struct.FSE_DTableHeader = type { 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 i64 @FSE_decompress_usingDTable(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) #1 {
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca ptr, align 8
  %14 = alloca i32, align 4
  %15 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store i64 %1, ptr %8, align 8, !tbaa !9
  store ptr %2, ptr %9, align 8, !tbaa !5
  store i64 %3, ptr %10, align 8, !tbaa !9
  store ptr %4, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  %16 = load ptr, ptr %11, align 8, !tbaa !5
  store ptr %16, ptr %12, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #3
  %17 = load ptr, ptr %12, align 8, !tbaa !5
  store ptr %17, ptr %13, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #3
  %18 = load ptr, ptr %13, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.FSE_DTableHeader, ptr %18, i32 0, i32 1
  %20 = load i16, ptr %19, align 2, !tbaa !11
  %21 = zext i16 %20 to i32
  store i32 %21, ptr %14, align 4, !tbaa !14
  %22 = load i32, ptr %14, align 4, !tbaa !14
  %23 = icmp ne i32 %22, 0
  br i1 %23, label %24, label %31

24:                                               ; preds = %5
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = load ptr, ptr %9, align 8, !tbaa !5
  %28 = load i64, ptr %10, align 8, !tbaa !9
  %29 = load ptr, ptr %11, align 8, !tbaa !5
  %30 = call i64 @FSE_decompress_usingDTable_generic(ptr noundef %25, i64 noundef %26, ptr noundef %27, i64 noundef %28, ptr noundef %29, i32 noundef 1)
  store i64 %30, ptr %6, align 8
  store i32 1, ptr %15, align 4
  br label %38

31:                                               ; preds = %5
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = load i64, ptr %8, align 8, !tbaa !9
  %34 = load ptr, ptr %9, align 8, !tbaa !5
  %35 = load i64, ptr %10, align 8, !tbaa !9
  %36 = load ptr, ptr %11, align 8, !tbaa !5
  %37 = call i64 @FSE_decompress_usingDTable_generic(ptr noundef %32, i64 noundef %33, ptr noundef %34, i64 noundef %35, ptr noundef %36, i32 noundef 0)
  store i64 %37, ptr %6, align 8
  store i32 1, ptr %15, align 4
  br label %38

38:                                               ; preds = %31, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  %39 = load i64, ptr %6, align 8
  ret i64 %39
}

; Function Attrs: alwaysinline nounwind uwtable
declare hidden i64 @FSE_decompress_usingDTable_generic(ptr noundef, i64 noundef, ptr noundef, i64 noundef, ptr noundef, i32 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 = { alwaysinline 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 #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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !13, i64 2}
!12 = !{!"", !13, i64 0, !13, i64 2}
!13 = !{!"short", !7, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"int", !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
define dso_local i64 @FSE_decompress_usingDTable(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) local_unnamed_addr #0 {
  %6 = getelementptr inbounds i8, ptr %4, i64 2
  %7 = load i16, ptr %6, align 2, !tbaa !5
  %.not = icmp ne i16 %7, 0
  %. = zext i1 %.not to i32
  %8 = tail call i64 @FSE_decompress_usingDTable_generic(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef nonnull %4, i32 noundef %.)
  ret i64 %8
}

; Function Attrs: alwaysinline nounwind uwtable
declare hidden i64 @FSE_decompress_usingDTable_generic(ptr noundef, i64 noundef, ptr noundef, i64 noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

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 = { alwaysinline 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)"}
!5 = !{!6, !7, i64 2}
!6 = !{!"", !7, i64 0, !7, i64 2}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


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