; LLVM IR from facebookresearch/habitat-sim :: src/deps/basis-universal/encoder (basisu_resampler)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZN6basisu9Resampler11scale_y_movEPfPKffi(ptr noundef nonnull align 8 dereferenceable(116) %0, ptr noundef %1, ptr noundef %2, float noundef %3, i32 noundef %4) #1 align 2 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca float, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store float %3, ptr %9, align 4, !tbaa !9
  store i32 %4, ptr %10, align 4, !tbaa !11
  %12 = load ptr, ptr %6, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %13 = load i32, ptr %10, align 4, !tbaa !11
  store i32 %13, ptr %11, align 4, !tbaa !11
  br label %14

14:                                               ; preds = %25, %5
  %15 = load i32, ptr %11, align 4, !tbaa !11
  %16 = icmp sgt i32 %15, 0
  br i1 %16, label %17, label %28

17:                                               ; preds = %14
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = getelementptr inbounds float, ptr %18, i32 1
  store ptr %19, ptr %8, align 8, !tbaa !5
  %20 = load float, ptr %18, align 4, !tbaa !9
  %21 = load float, ptr %9, align 4, !tbaa !9
  %22 = fmul float %20, %21
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds float, ptr %23, i32 1
  store ptr %24, ptr %7, align 8, !tbaa !5
  store float %22, ptr %23, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %17
  %26 = load i32, ptr %11, align 4, !tbaa !11
  %27 = add nsw i32 %26, -1
  store i32 %27, ptr %11, align 4, !tbaa !11
  br label %14, !llvm.loop !13

28:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN6basisu9Resampler11scale_y_movEPfPKffi(ptr nocapture noundef nonnull readnone align 8 dereferenceable(116) %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef readonly %2, float noundef %3, i32 noundef %4) local_unnamed_addr #0 align 2 {
  %6 = icmp sgt i32 %4, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %7 = ptrtoint ptr %1 to i64
  %8 = ptrtoint ptr %2 to i64
  %9 = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 8
  %10 = sub i64 %7, %8
  %diff.check = icmp ult i64 %10, 32
  %or.cond = or i1 %min.iters.check, %diff.check
  br i1 %or.cond, label %.lr.ph.preheader20, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %9, 2147483640
  %.cast = trunc nuw nsw i64 %n.vec to i32
  %ind.end = sub nsw i32 %4, %.cast
  %11 = shl nuw nsw i64 %n.vec, 2
  %ind.end11 = getelementptr i8, ptr %1, i64 %11
  %12 = shl nuw nsw i64 %n.vec, 2
  %ind.end13 = getelementptr i8, ptr %2, i64 %12
  %broadcast.splatinsert = insertelement <4 x float> poison, float %3, i64 0
  %broadcast.splat = shufflevector <4 x float> %broadcast.splatinsert, <4 x float> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = shl i64 %index, 2
  %next.gep = getelementptr i8, ptr %1, i64 %offset.idx
  %offset.idx16 = shl i64 %index, 2
  %next.gep17 = getelementptr i8, ptr %2, i64 %offset.idx16
  %13 = getelementptr i8, ptr %next.gep17, i64 16
  %wide.load = load <4 x float>, ptr %next.gep17, align 4, !tbaa !5
  %wide.load19 = load <4 x float>, ptr %13, align 4, !tbaa !5
  %14 = fmul <4 x float> %wide.load, %broadcast.splat
  %15 = fmul <4 x float> %wide.load19, %broadcast.splat
  %16 = getelementptr i8, ptr %next.gep, i64 16
  store <4 x float> %14, ptr %next.gep, align 4, !tbaa !5
  store <4 x float> %15, ptr %16, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %17 = icmp eq i64 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %9
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader20

.lr.ph.preheader20:                               ; preds = %middle.block, %.lr.ph.preheader
  %.010.ph = phi i32 [ %4, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.069.ph = phi ptr [ %1, %.lr.ph.preheader ], [ %ind.end11, %middle.block ]
  %.078.ph = phi ptr [ %2, %.lr.ph.preheader ], [ %ind.end13, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader20, %.lr.ph
  %.010 = phi i32 [ %22, %.lr.ph ], [ %.010.ph, %.lr.ph.preheader20 ]
  %.069 = phi ptr [ %21, %.lr.ph ], [ %.069.ph, %.lr.ph.preheader20 ]
  %.078 = phi ptr [ %18, %.lr.ph ], [ %.078.ph, %.lr.ph.preheader20 ]
  %18 = getelementptr inbounds i8, ptr %.078, i64 4
  %19 = load float, ptr %.078, align 4, !tbaa !5
  %20 = fmul float %19, %3
  %21 = getelementptr inbounds i8, ptr %.069, i64 4
  store float %20, ptr %.069, align 4, !tbaa !5
  %22 = add nsw i32 %.010, -1
  %23 = icmp ugt i32 %.010, 1
  br i1 %23, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: 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" }

!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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass