; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN6basisu9Resampler11scale_y_addEPfPKffi(ptr noundef nonnull align 8 dereferenceable(116) %0, ptr noundef %1, ptr noundef %2, float noundef %3, i32 noundef %4) #2 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) #3
  %13 = load i32, ptr %10, align 4, !tbaa !11
  store i32 %13, ptr %11, align 4, !tbaa !11
  br label %14

14:                                               ; preds = %27, %5
  %15 = load i32, ptr %11, align 4, !tbaa !11
  %16 = icmp sgt i32 %15, 0
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %30

18:                                               ; preds = %14
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  %20 = getelementptr inbounds float, ptr %19, i32 1
  store ptr %20, ptr %8, align 8, !tbaa !5
  %21 = load float, ptr %19, align 4, !tbaa !9
  %22 = load float, ptr %9, align 4, !tbaa !9
  %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
  %25 = load float, ptr %23, align 4, !tbaa !9
  %26 = call float @llvm.fmuladd.f32(float %21, float %22, float %25)
  store float %26, ptr %23, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %18
  %28 = load i32, ptr %11, align 4, !tbaa !11
  %29 = add nsw i32 %28, -1
  store i32 %29, ptr %11, align 4, !tbaa !11
  br label %14, !llvm.loop !13

30:                                               ; preds = %17
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #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++ 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 nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN6basisu9Resampler11scale_y_addEPfPKffi(ptr nocapture noundef nonnull readnone align 8 dereferenceable(116) %0, ptr nocapture noundef %1, ptr nocapture noundef readonly %2, float noundef %3, i32 noundef %4) local_unnamed_addr #1 align 2 {
  %6 = icmp sgt i32 %4, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %7 = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 8
  br i1 %min.iters.check, label %.lr.ph.preheader23, label %vector.memcheck

.lr.ph.preheader23:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.010.ph = phi i32 [ %4, %vector.memcheck ], [ %4, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.069.ph = phi ptr [ %1, %vector.memcheck ], [ %1, %.lr.ph.preheader ], [ %ind.end12, %middle.block ]
  %.078.ph = phi ptr [ %2, %vector.memcheck ], [ %2, %.lr.ph.preheader ], [ %ind.end14, %middle.block ]
  br label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %8 = add nsw i32 %4, -1
  %9 = zext i32 %8 to i64
  %10 = shl nuw nsw i64 %9, 2
  %11 = add nuw nsw i64 %10, 4
  %scevgep = getelementptr i8, ptr %1, i64 %11
  %scevgep11 = getelementptr i8, ptr %2, i64 %11
  %bound0 = icmp ugt ptr %scevgep11, %1
  %bound1 = icmp ugt ptr %scevgep, %2
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader23, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %7, 2147483640
  %.cast = trunc nuw nsw i64 %n.vec to i32
  %ind.end = sub nsw i32 %4, %.cast
  %12 = shl nuw nsw i64 %n.vec, 2
  %ind.end12 = getelementptr i8, ptr %1, i64 %12
  %13 = shl nuw nsw i64 %n.vec, 2
  %ind.end14 = getelementptr i8, ptr %2, i64 %13
  %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.idx17 = shl i64 %index, 2
  %next.gep18 = getelementptr i8, ptr %2, i64 %offset.idx17
  %14 = getelementptr i8, ptr %next.gep18, i64 16
  %wide.load = load <4 x float>, ptr %next.gep18, align 4, !tbaa !5, !alias.scope !9
  %wide.load20 = load <4 x float>, ptr %14, align 4, !tbaa !5, !alias.scope !9
  %15 = getelementptr i8, ptr %next.gep, i64 16
  %wide.load21 = load <4 x float>, ptr %next.gep, align 4, !tbaa !5, !alias.scope !12, !noalias !9
  %wide.load22 = load <4 x float>, ptr %15, align 4, !tbaa !5, !alias.scope !12, !noalias !9
  %16 = tail call <4 x float> @llvm.fmuladd.v4f32(<4 x float> %wide.load, <4 x float> %broadcast.splat, <4 x float> %wide.load21)
  %17 = tail call <4 x float> @llvm.fmuladd.v4f32(<4 x float> %wide.load20, <4 x float> %broadcast.splat, <4 x float> %wide.load22)
  store <4 x float> %16, ptr %next.gep, align 4, !tbaa !5, !alias.scope !12, !noalias !9
  store <4 x float> %17, ptr %15, align 4, !tbaa !5, !alias.scope !12, !noalias !9
  %index.next = add nuw i64 %index, 8
  %18 = icmp eq i64 %index.next, %n.vec
  br i1 %18, label %middle.block, label %vector.body, !llvm.loop !14

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %7
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader23

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

.lr.ph:                                           ; preds = %.lr.ph.preheader23, %.lr.ph
  %.010 = phi i32 [ %24, %.lr.ph ], [ %.010.ph, %.lr.ph.preheader23 ]
  %.069 = phi ptr [ %21, %.lr.ph ], [ %.069.ph, %.lr.ph.preheader23 ]
  %.078 = phi ptr [ %19, %.lr.ph ], [ %.078.ph, %.lr.ph.preheader23 ]
  %19 = getelementptr inbounds i8, ptr %.078, i64 4
  %20 = load float, ptr %.078, align 4, !tbaa !5
  %21 = getelementptr inbounds i8, ptr %.069, i64 4
  %22 = load float, ptr %.069, align 4, !tbaa !5
  %23 = tail call float @llvm.fmuladd.f32(float %20, float %3, float %22)
  store float %23, ptr %.069, align 4, !tbaa !5
  %24 = add nsw i32 %.010, -1
  %25 = icmp ugt i32 %.010, 1
  br i1 %25, label %.lr.ph, label %._crit_edge, !llvm.loop !18
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x float> @llvm.fmuladd.v4f32(<4 x float>, <4 x float>, <4 x float>) #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { 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" }
attributes #2 = { 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10}
!10 = distinct !{!10, !11}
!11 = distinct !{!11, !"LVerDomain"}
!12 = !{!13}
!13 = distinct !{!13, !11}
!14 = distinct !{!14, !15, !16, !17}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!"llvm.loop.isvectorized", i32 1}
!17 = !{!"llvm.loop.unroll.runtime.disable"}
!18 = distinct !{!18, !15, !16}


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