; 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 float @huff_cost(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = call i32 @is_leaf(ptr noundef %5)
  %7 = icmp ne i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  br label %34

9:                                                ; preds = %2
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr %4, align 4, !tbaa !9
  %12 = icmp slt i32 %11, 0
  br i1 %12, label %13, label %18

13:                                               ; preds = %9
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.huff_t, ptr %14, i32 0, i32 6
  %16 = getelementptr inbounds %struct.anon, ptr %15, i32 0, i32 2
  %17 = load float, ptr %16, align 4, !tbaa !11
  br label %32

18:                                               ; preds = %9
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.huff_t, ptr %19, i32 0, i32 2
  %21 = getelementptr inbounds [2 x ptr], ptr %20, i64 0, i64 0
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = call float @huff_cost(ptr noundef %22, i32 noundef %23)
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.huff_t, ptr %25, i32 0, i32 2
  %27 = getelementptr inbounds [2 x ptr], ptr %26, i64 0, i64 1
  %28 = load ptr, ptr %27, align 8, !tbaa !5
  %29 = load i32, ptr %4, align 4, !tbaa !9
  %30 = call float @huff_cost(ptr noundef %28, i32 noundef %29)
  %31 = fadd float %24, %30
  br label %32

32:                                               ; preds = %18, %13
  %33 = phi float [ %17, %13 ], [ %31, %18 ]
  br label %34

34:                                               ; preds = %32, %8
  %35 = phi float [ 0.000000e+00, %8 ], [ %33, %32 ]
  ret float %35
}

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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !14, i64 52}
!12 = !{!"huff_t", !6, i64 0, !6, i64 8, !7, i64 16, !10, i64 32, !10, i64 36, !10, i64 40, !13, i64 44, !10, i64 56, !10, i64 60, !10, i64 64}
!13 = !{!"", !10, i64 0, !10, i64 4, !14, i64 8}
!14 = !{!"float", !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 @is_leaf(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local float @huff_cost(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @is_leaf(ptr noundef %0)
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %4, label %common.ret6

4:                                                ; preds = %2
  %5 = icmp slt i32 %1, 1
  br i1 %5, label %6, label %9

6:                                                ; preds = %4
  %7 = getelementptr inbounds i8, ptr %0, i64 52
  %8 = load float, ptr %7, align 4, !tbaa !5
  br label %common.ret6

common.ret6:                                      ; preds = %6, %2, %9
  %common.ret6.op = phi float [ %17, %9 ], [ 0.000000e+00, %2 ], [ %8, %6 ]
  ret float %common.ret6.op

9:                                                ; preds = %4
  %10 = add nsw i32 %1, -1
  %11 = getelementptr inbounds i8, ptr %0, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !13
  %13 = tail call float @huff_cost(ptr noundef %12, i32 noundef %10)
  %14 = getelementptr inbounds i8, ptr %0, i64 24
  %15 = load ptr, ptr %14, align 8, !tbaa !13
  %16 = tail call float @huff_cost(ptr noundef %15, i32 noundef %10)
  %17 = fadd float %13, %16
  br label %common.ret6
}

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, !12, i64 52}
!6 = !{!"huff_t", !7, i64 0, !7, i64 8, !8, i64 16, !10, i64 32, !10, i64 36, !10, i64 40, !11, i64 44, !10, i64 56, !10, i64 60, !10, i64 64}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"", !10, i64 0, !10, i64 4, !12, i64 8}
!12 = !{!"float", !8, i64 0}
!13 = !{!7, !7, i64 0}


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