; LLVM IR from SOHNE/Dura2D :: src/math/d2VecN.ll (ZN6d2VecNmIERKS_)

; 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.d2VecN = type { i32, ptr }

; 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 noundef nonnull align 8 dereferenceable(16) ptr @_ZN6d2VecNmIERKS_(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 8 dereferenceable(16) %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %28, %2
  %8 = load i32, ptr %5, align 4, !tbaa !9
  %9 = getelementptr inbounds %struct.d2VecN, ptr %6, i32 0, i32 0
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = icmp slt i32 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %31

13:                                               ; preds = %7
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.d2VecN, ptr %14, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds float, ptr %16, i64 %18
  %20 = load float, ptr %19, align 4, !tbaa !14
  %21 = getelementptr inbounds %struct.d2VecN, ptr %6, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds float, ptr %22, i64 %24
  %26 = load float, ptr %25, align 4, !tbaa !14
  %27 = fsub float %26, %20
  store float %27, ptr %25, align 4, !tbaa !14
  br label %28

28:                                               ; preds = %13
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %5, align 4, !tbaa !9
  br label %7, !llvm.loop !16

31:                                               ; preds = %12
  ret ptr %6
}

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 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS6d2VecN", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !15, i64 0}
!15 = !{!"float", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 noundef nonnull align 8 dereferenceable(16) ptr @_ZN6d2VecNmIERKS_(ptr noundef nonnull readonly returned align 8 dereferenceable(16) %0, ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %1) local_unnamed_addr #0 align 2 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !11
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 8
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.memcheck

scalar.ph.preheader:                              ; preds = %middle.block, %vector.memcheck, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %9 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.prol
  %10 = load float, ptr %9, align 4, !tbaa !12
  %11 = getelementptr inbounds float, ptr %8, i64 %indvars.iv.prol
  %12 = load float, ptr %11, align 4, !tbaa !12
  %13 = fsub float %12, %10
  store float %13, ptr %11, align 4, !tbaa !12
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !14

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %14 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %15 = icmp ugt i64 %14, -4
  br i1 %15, label %._crit_edge, label %scalar.ph

vector.memcheck:                                  ; preds = %.lr.ph
  %16 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep = getelementptr i8, ptr %8, i64 %16
  %scevgep7 = getelementptr i8, ptr %6, i64 %16
  %bound0 = icmp ult ptr %8, %scevgep7
  %bound1 = icmp ult ptr %6, %scevgep
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483640
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %17 = getelementptr inbounds float, ptr %6, i64 %index
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  %wide.load = load <4 x float>, ptr %17, align 4, !tbaa !12, !alias.scope !16
  %wide.load8 = load <4 x float>, ptr %18, align 4, !tbaa !12, !alias.scope !16
  %19 = getelementptr inbounds float, ptr %8, i64 %index
  %20 = getelementptr inbounds i8, ptr %19, i64 16
  %wide.load9 = load <4 x float>, ptr %19, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  %wide.load10 = load <4 x float>, ptr %20, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  %21 = fsub <4 x float> %wide.load9, %wide.load
  %22 = fsub <4 x float> %wide.load10, %wide.load8
  store <4 x float> %21, ptr %19, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  store <4 x float> %22, ptr %20, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  %index.next = add nuw i64 %index, 8
  %23 = icmp eq i64 %index.next, %n.vec
  br i1 %23, label %middle.block, label %vector.body, !llvm.loop !21

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %scalar.ph.preheader

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %2
  ret ptr %0

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %24 = getelementptr inbounds float, ptr %6, i64 %indvars.iv
  %25 = load float, ptr %24, align 4, !tbaa !12
  %26 = getelementptr inbounds float, ptr %8, i64 %indvars.iv
  %27 = load float, ptr %26, align 4, !tbaa !12
  %28 = fsub float %27, %25
  store float %28, ptr %26, align 4, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %29 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next
  %30 = load float, ptr %29, align 4, !tbaa !12
  %31 = getelementptr inbounds float, ptr %8, i64 %indvars.iv.next
  %32 = load float, ptr %31, align 4, !tbaa !12
  %33 = fsub float %32, %30
  store float %33, ptr %31, align 4, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %34 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next.1
  %35 = load float, ptr %34, align 4, !tbaa !12
  %36 = getelementptr inbounds float, ptr %8, i64 %indvars.iv.next.1
  %37 = load float, ptr %36, align 4, !tbaa !12
  %38 = fsub float %37, %35
  store float %38, ptr %36, align 4, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %39 = getelementptr inbounds float, ptr %6, i64 %indvars.iv.next.2
  %40 = load float, ptr %39, align 4, !tbaa !12
  %41 = getelementptr inbounds float, ptr %8, i64 %indvars.iv.next.2
  %42 = load float, ptr %41, align 4, !tbaa !12
  %43 = fsub float %42, %40
  store float %43, ptr %41, align 4, !tbaa !12
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %scalar.ph, !llvm.loop !25
}

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, !7, i64 0}
!6 = !{!"_ZTS6d2VecN", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.unroll.disable"}
!16 = !{!17}
!17 = distinct !{!17, !18}
!18 = distinct !{!18, !"LVerDomain"}
!19 = !{!20}
!20 = distinct !{!20, !18}
!21 = distinct !{!21, !22, !23, !24}
!22 = !{!"llvm.loop.mustprogress"}
!23 = !{!"llvm.loop.isvectorized", i32 1}
!24 = !{!"llvm.loop.unroll.runtime.disable"}
!25 = distinct !{!25, !22, !23}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass