; LLVM IR from litespeedtech/ls-qpack :: lsqpack (lsqpack_dec_int24)

; 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 dso_local i32 @lsqpack_dec_int(ptr noundef, ptr noundef, i32 noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @lsqpack_dec_int24(ptr noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i64, align 8
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !9
  store ptr %3, ptr %10, align 8, !tbaa !5
  store ptr %4, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #2
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = load ptr, ptr %8, align 8, !tbaa !5
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = load ptr, ptr %11, align 8, !tbaa !5
  %19 = call i32 @lsqpack_dec_int(ptr noundef %15, ptr noundef %16, i32 noundef %17, ptr noundef %12, ptr noundef %18)
  store i32 %19, ptr %13, align 4, !tbaa !9
  %20 = load i32, ptr %13, align 4, !tbaa !9
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %29

22:                                               ; preds = %5
  %23 = load i64, ptr %12, align 8, !tbaa !11
  %24 = icmp ult i64 %23, 16777216
  br i1 %24, label %25, label %29

25:                                               ; preds = %22
  %26 = load i64, ptr %12, align 8, !tbaa !11
  %27 = trunc i64 %26 to i32
  %28 = load ptr, ptr %10, align 8, !tbaa !5
  store i32 %27, ptr %28, align 4, !tbaa !9
  store i32 0, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %35

29:                                               ; preds = %22, %5
  %30 = load i32, ptr %13, align 4, !tbaa !9
  %31 = icmp ne i32 %30, 0
  br i1 %31, label %32, label %34

32:                                               ; preds = %29
  %33 = load i32, ptr %13, align 4, !tbaa !9
  store i32 %33, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %35

34:                                               ; preds = %29
  store i32 -2, ptr %6, align 4
  store i32 1, ptr %14, align 4
  br label %35

35:                                               ; preds = %34, %32, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  %36 = load i32, ptr %6, align 4
  ret i32 %36
}

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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @lsqpack_dec_int(ptr noundef, ptr noundef, i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @lsqpack_dec_int24(ptr noundef %0, ptr noundef %1, i32 noundef %2, ptr nocapture noundef writeonly %3, ptr noundef %4) local_unnamed_addr #1 {
  %6 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #2
  %7 = call i32 @lsqpack_dec_int(ptr noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef nonnull %6, ptr noundef %4)
  %8 = icmp eq i32 %7, 0
  %9 = load i64, ptr %6, align 8
  %10 = icmp ult i64 %9, 16777216
  %or.cond = select i1 %8, i1 %10, i1 false
  br i1 %or.cond, label %11, label %13

11:                                               ; preds = %5
  %12 = trunc nuw nsw i64 %9 to i32
  store i32 %12, ptr %3, align 4, !tbaa !5
  br label %14

13:                                               ; preds = %5
  %. = select i1 %8, i32 -2, i32 %7
  br label %14

14:                                               ; preds = %13, %11
  %.0 = phi i32 [ 0, %11 ], [ %., %13 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #2
  ret i32 %.0
}

attributes #0 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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