; LLVM IR from datocms/fast_thumbhash :: ext/fast_thumbhash (fast_thumbhash)

; 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
define dso_local zeroext i8 @write_varying_factors(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i8, align 1
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %47, %4
  %12 = load i32, ptr %10, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %50

16:                                               ; preds = %11
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = zext i8 %18 to i32
  %20 = ashr i32 %19, 1
  %21 = trunc i32 %20 to i8
  store i8 %21, ptr %9, align 1, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %10, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %22, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !12
  %27 = fmul double 1.500000e+01, %26
  %28 = fptrunc double %27 to float
  %29 = call float @llvm.round.f32(float %28)
  %30 = fptoui float %29 to i8
  %31 = zext i8 %30 to i32
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = add i8 %33, 1
  store i8 %34, ptr %32, align 1, !tbaa !11
  %35 = zext i8 %33 to i32
  %36 = and i32 %35, 1
  %37 = shl i32 %36, 2
  %38 = shl i32 %31, %37
  %39 = load ptr, ptr %7, align 8, !tbaa !5
  %40 = load i8, ptr %9, align 1, !tbaa !11
  %41 = zext i8 %40 to i64
  %42 = getelementptr inbounds i8, ptr %39, i64 %41
  %43 = load i8, ptr %42, align 1, !tbaa !11
  %44 = zext i8 %43 to i32
  %45 = or i32 %44, %38
  %46 = trunc i32 %45 to i8
  store i8 %46, ptr %42, align 1, !tbaa !11
  br label %47

47:                                               ; preds = %16
  %48 = load i32, ptr %10, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %10, align 4, !tbaa !9
  br label %11, !llvm.loop !14

50:                                               ; preds = %15
  %51 = load i8, ptr %9, align 1, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #3
  ret i8 %51
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.round.f32(float) #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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; 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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local zeroext i8 @write_varying_factors(ptr nocapture noundef readonly %0, i32 noundef %1, ptr nocapture noundef %2, ptr nocapture noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.09.lcssa = phi i8 [ undef, %4 ], [ %7, %.lr.ph ]
  ret i8 %.09.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %6 = load i8, ptr %3, align 1, !tbaa !5
  %7 = lshr i8 %6, 1
  %8 = getelementptr inbounds double, ptr %0, i64 %indvars.iv
  %9 = load double, ptr %8, align 8, !tbaa !8
  %10 = fmul double %9, 1.500000e+01
  %11 = fptrunc double %10 to float
  %12 = tail call float @llvm.round.f32(float %11)
  %13 = fptoui float %12 to i8
  %14 = add i8 %6, 1
  store i8 %14, ptr %3, align 1, !tbaa !5
  %15 = shl i8 %6, 2
  %16 = and i8 %15, 4
  %17 = shl i8 %13, %16
  %18 = zext nneg i8 %7 to i64
  %19 = getelementptr inbounds i8, ptr %2, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = or i8 %17, %20
  store i8 %21, ptr %19, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.round.f32(float) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = { mustprogress 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"double", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass