; LLVM IR from AnzoDK/RPAudio :: includes/minimp3/huffopt (huffopt)

; 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.huff_t = type { ptr, ptr, [2 x ptr], i32, i32, i32, %struct.anon, i32, i32, i32 }
%struct.anon = type { i32, i32, float }

; Function Attrs: nounwind uwtable
declare hidden i32 @is_leaf(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @huff_depth(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = call i32 @is_leaf(ptr noundef %3)
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %6, label %7

6:                                                ; preds = %1
  br label %20

7:                                                ; preds = %1
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.huff_t, ptr %8, i32 0, i32 2
  %10 = getelementptr inbounds [2 x ptr], ptr %9, i64 0, i64 0
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = call i32 @huff_depth(ptr noundef %11)
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.huff_t, ptr %13, i32 0, i32 2
  %15 = getelementptr inbounds [2 x ptr], ptr %14, i64 0, i64 1
  %16 = load ptr, ptr %15, align 8, !tbaa !5
  %17 = call i32 @huff_depth(ptr noundef %16)
  %18 = call i32 @imax(i32 noundef %12, i32 noundef %17)
  %19 = add nsw i32 1, %18
  br label %20

20:                                               ; preds = %7, %6
  %21 = phi i32 [ 0, %6 ], [ %19, %7 ]
  ret i32 %21
}

; Function Attrs: nounwind uwtable
declare hidden i32 @imax(i32 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" }

!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"}


; 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 @is_leaf(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 -2147483647, -2147483648) i32 @huff_depth(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @is_leaf(ptr noundef %0)
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %3, label %common.ret3

common.ret3:                                      ; preds = %1, %3
  %common.ret3.op = phi i32 [ %11, %3 ], [ 0, %1 ]
  ret i32 %common.ret3.op

3:                                                ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = tail call i32 @huff_depth(ptr noundef %5)
  %7 = getelementptr inbounds i8, ptr %0, i64 24
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = tail call i32 @huff_depth(ptr noundef %8)
  %10 = tail call i32 @imax(i32 noundef %6, i32 noundef %9)
  %11 = add nsw i32 %10, 1
  br label %common.ret3
}

; Function Attrs: nounwind uwtable
declare hidden i32 @imax(i32 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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