; LLVM IR from dbry/wavpack-stream :: src (entropy_utils)

; 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: nounwind uwtable
define dso_local signext i8 @store_weight(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 1024
  br i1 %4, label %5, label %6

5:                                                ; preds = %1
  store i32 1024, ptr %2, align 4, !tbaa !5
  br label %11

6:                                                ; preds = %1
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp slt i32 %7, -1024
  br i1 %8, label %9, label %10

9:                                                ; preds = %6
  store i32 -1024, ptr %2, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %9, %6
  br label %11

11:                                               ; preds = %10, %5
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %14, label %20

14:                                               ; preds = %11
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = add nsw i32 %15, 64
  %17 = ashr i32 %16, 7
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sub nsw i32 %18, %17
  store i32 %19, ptr %2, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %14, %11
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = add nsw i32 %21, 4
  %23 = ashr i32 %22, 3
  %24 = trunc i32 %23 to i8
  ret i8 %24
}

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 = !{!"int", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local signext i8 @store_weight(i32 noundef %0) local_unnamed_addr #0 {
  %spec.store.select = tail call i32 @llvm.smax.i32(i32 %0, i32 -1024)
  %.0 = tail call i32 @llvm.smin.i32(i32 %spec.store.select, i32 1024)
  %2 = icmp sgt i32 %0, 0
  %3 = add nuw nsw i32 %.0, 64
  %4 = lshr i32 %3, 7
  %5 = select i1 %2, i32 %4, i32 0
  %.1 = add nsw i32 %.0, 4
  %6 = sub nsw i32 %.1, %5
  %7 = lshr i32 %6, 3
  %8 = trunc i32 %7 to i8
  ret i8 %8
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 speculatable willreturn memory(none) }

!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: GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass