; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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 void @r8vec_concatenate(i32 noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %11, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %26, %5
  %13 = load i32, ptr %11, align 4, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %29

16:                                               ; preds = %12
  %17 = load ptr, ptr %7, align 8, !tbaa !9
  %18 = load i32, ptr %11, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds double, ptr %17, i64 %19
  %21 = load double, ptr %20, align 8, !tbaa !11
  %22 = load ptr, ptr %10, align 8, !tbaa !9
  %23 = load i32, ptr %11, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %22, i64 %24
  store double %21, ptr %25, align 8, !tbaa !11
  br label %26

26:                                               ; preds = %16
  %27 = load i32, ptr %11, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %11, align 4, !tbaa !5
  br label %12, !llvm.loop !13

29:                                               ; preds = %12
  store i32 0, ptr %11, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %46, %29
  %31 = load i32, ptr %11, align 4, !tbaa !5
  %32 = load i32, ptr %8, align 4, !tbaa !5
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %34, label %49

34:                                               ; preds = %30
  %35 = load ptr, ptr %9, align 8, !tbaa !9
  %36 = load i32, ptr %11, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds double, ptr %35, i64 %37
  %39 = load double, ptr %38, align 8, !tbaa !11
  %40 = load ptr, ptr %10, align 8, !tbaa !9
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = load i32, ptr %11, align 4, !tbaa !5
  %43 = add nsw i32 %41, %42
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds double, ptr %40, i64 %44
  store double %39, ptr %45, align 8, !tbaa !11
  br label %46

46:                                               ; preds = %34
  %47 = load i32, ptr %11, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %11, align 4, !tbaa !5
  br label %30, !llvm.loop !15

49:                                               ; preds = %30
  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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 void @r8vec_concatenate(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, ptr nocapture noundef readonly %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #0 {
  %6 = ptrtoint ptr %3 to i64
  %7 = ptrtoint ptr %4 to i64
  %8 = icmp sgt i32 %0, 0
  br i1 %8, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %5
  %9 = ptrtoint ptr %4 to i64
  %10 = ptrtoint ptr %1 to i64
  %wide.trip.count = zext nneg i32 %0 to i64
  %min.iters.check = icmp ult i32 %0, 6
  %11 = sub i64 %9, %10
  %diff.check = icmp ult i64 %11, 32
  %or.cond = or i1 %min.iters.check, %diff.check
  br i1 %or.cond, label %.lr.ph.preheader41, label %vector.ph

.lr.ph.preheader41:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %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 %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader41, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader41 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader41 ]
  %12 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.prol
  %13 = load double, ptr %12, align 8, !tbaa !5
  %14 = getelementptr inbounds double, ptr %4, i64 %indvars.iv.prol
  store double %13, ptr %14, align 8, !tbaa !5
  %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 %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !9

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader41
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader41 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %15 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %16 = icmp ugt i64 %15, -4
  br i1 %16, label %.preheader, label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %17 = getelementptr inbounds double, ptr %1, i64 %index
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  %wide.load = load <2 x double>, ptr %17, align 8, !tbaa !5
  %wide.load24 = load <2 x double>, ptr %18, align 8, !tbaa !5
  %19 = getelementptr inbounds double, ptr %4, i64 %index
  %20 = getelementptr inbounds i8, ptr %19, i64 16
  store <2 x double> %wide.load, ptr %19, align 8, !tbaa !5
  store <2 x double> %wide.load24, ptr %20, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %21 = icmp eq i64 %index.next, %n.vec
  br i1 %21, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %.preheader, label %.lr.ph.preheader41

.preheader:                                       ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %5
  %22 = icmp sgt i32 %2, 0
  br i1 %22, label %.lr.ph17.preheader, label %._crit_edge

.lr.ph17.preheader:                               ; preds = %.preheader
  %23 = sext i32 %0 to i64
  %wide.trip.count22 = zext nneg i32 %2 to i64
  %invariant.gep = getelementptr double, ptr %4, i64 %23
  %min.iters.check29 = icmp ult i32 %2, 10
  br i1 %min.iters.check29, label %.lr.ph17.preheader40, label %vector.memcheck25

.lr.ph17.preheader40:                             ; preds = %middle.block27, %vector.memcheck25, %.lr.ph17.preheader
  %indvars.iv19.ph = phi i64 [ 0, %vector.memcheck25 ], [ 0, %.lr.ph17.preheader ], [ %n.vec32, %middle.block27 ]
  %xtraiter42 = and i64 %wide.trip.count22, 3
  %lcmp.mod43.not = icmp eq i64 %xtraiter42, 0
  br i1 %lcmp.mod43.not, label %.lr.ph17.prol.loopexit, label %.lr.ph17.prol

.lr.ph17.prol:                                    ; preds = %.lr.ph17.preheader40, %.lr.ph17.prol
  %indvars.iv19.prol = phi i64 [ %indvars.iv.next20.prol, %.lr.ph17.prol ], [ %indvars.iv19.ph, %.lr.ph17.preheader40 ]
  %prol.iter44 = phi i64 [ %prol.iter44.next, %.lr.ph17.prol ], [ 0, %.lr.ph17.preheader40 ]
  %24 = getelementptr inbounds double, ptr %3, i64 %indvars.iv19.prol
  %25 = load double, ptr %24, align 8, !tbaa !5
  %gep.prol = getelementptr double, ptr %invariant.gep, i64 %indvars.iv19.prol
  store double %25, ptr %gep.prol, align 8, !tbaa !5
  %indvars.iv.next20.prol = add nuw nsw i64 %indvars.iv19.prol, 1
  %prol.iter44.next = add i64 %prol.iter44, 1
  %prol.iter44.cmp.not = icmp eq i64 %prol.iter44.next, %xtraiter42
  br i1 %prol.iter44.cmp.not, label %.lr.ph17.prol.loopexit, label %.lr.ph17.prol, !llvm.loop !15

.lr.ph17.prol.loopexit:                           ; preds = %.lr.ph17.prol, %.lr.ph17.preheader40
  %indvars.iv19.unr = phi i64 [ %indvars.iv19.ph, %.lr.ph17.preheader40 ], [ %indvars.iv.next20.prol, %.lr.ph17.prol ]
  %26 = sub nsw i64 %indvars.iv19.ph, %wide.trip.count22
  %27 = icmp ugt i64 %26, -4
  br i1 %27, label %._crit_edge, label %.lr.ph17

vector.memcheck25:                                ; preds = %.lr.ph17.preheader
  %28 = shl nsw i64 %23, 3
  %29 = add i64 %28, %7
  %30 = sub i64 %29, %6
  %diff.check26 = icmp ult i64 %30, 32
  br i1 %diff.check26, label %.lr.ph17.preheader40, label %vector.ph30

vector.ph30:                                      ; preds = %vector.memcheck25
  %n.vec32 = and i64 %wide.trip.count22, 2147483644
  br label %vector.body34

vector.body34:                                    ; preds = %vector.body34, %vector.ph30
  %index35 = phi i64 [ 0, %vector.ph30 ], [ %index.next38, %vector.body34 ]
  %31 = getelementptr inbounds double, ptr %3, i64 %index35
  %32 = getelementptr inbounds i8, ptr %31, i64 16
  %wide.load36 = load <2 x double>, ptr %31, align 8, !tbaa !5
  %wide.load37 = load <2 x double>, ptr %32, align 8, !tbaa !5
  %33 = getelementptr double, ptr %invariant.gep, i64 %index35
  %34 = getelementptr i8, ptr %33, i64 16
  store <2 x double> %wide.load36, ptr %33, align 8, !tbaa !5
  store <2 x double> %wide.load37, ptr %34, align 8, !tbaa !5
  %index.next38 = add nuw i64 %index35, 4
  %35 = icmp eq i64 %index.next38, %n.vec32
  br i1 %35, label %middle.block27, label %vector.body34, !llvm.loop !16

middle.block27:                                   ; preds = %vector.body34
  %cmp.n39 = icmp eq i64 %n.vec32, %wide.trip.count22
  br i1 %cmp.n39, label %._crit_edge, label %.lr.ph17.preheader40

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %36 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %37 = load double, ptr %36, align 8, !tbaa !5
  %38 = getelementptr inbounds double, ptr %4, i64 %indvars.iv
  store double %37, ptr %38, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %39 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next
  %40 = load double, ptr %39, align 8, !tbaa !5
  %41 = getelementptr inbounds double, ptr %4, i64 %indvars.iv.next
  store double %40, ptr %41, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %42 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next.1
  %43 = load double, ptr %42, align 8, !tbaa !5
  %44 = getelementptr inbounds double, ptr %4, i64 %indvars.iv.next.1
  store double %43, ptr %44, align 8, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %45 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next.2
  %46 = load double, ptr %45, align 8, !tbaa !5
  %47 = getelementptr inbounds double, ptr %4, i64 %indvars.iv.next.2
  store double %46, ptr %47, align 8, !tbaa !5
  %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 %.preheader, label %.lr.ph, !llvm.loop !17

.lr.ph17:                                         ; preds = %.lr.ph17.prol.loopexit, %.lr.ph17
  %indvars.iv19 = phi i64 [ %indvars.iv.next20.3, %.lr.ph17 ], [ %indvars.iv19.unr, %.lr.ph17.prol.loopexit ]
  %48 = getelementptr inbounds double, ptr %3, i64 %indvars.iv19
  %49 = load double, ptr %48, align 8, !tbaa !5
  %gep = getelementptr double, ptr %invariant.gep, i64 %indvars.iv19
  store double %49, ptr %gep, align 8, !tbaa !5
  %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 1
  %50 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next20
  %51 = load double, ptr %50, align 8, !tbaa !5
  %gep.1 = getelementptr double, ptr %invariant.gep, i64 %indvars.iv.next20
  store double %51, ptr %gep.1, align 8, !tbaa !5
  %indvars.iv.next20.1 = add nuw nsw i64 %indvars.iv19, 2
  %52 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next20.1
  %53 = load double, ptr %52, align 8, !tbaa !5
  %gep.2 = getelementptr double, ptr %invariant.gep, i64 %indvars.iv.next20.1
  store double %53, ptr %gep.2, align 8, !tbaa !5
  %indvars.iv.next20.2 = add nuw nsw i64 %indvars.iv19, 3
  %54 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next20.2
  %55 = load double, ptr %54, align 8, !tbaa !5
  %gep.3 = getelementptr double, ptr %invariant.gep, i64 %indvars.iv.next20.2
  store double %55, ptr %gep.3, align 8, !tbaa !5
  %indvars.iv.next20.3 = add nuw nsw i64 %indvars.iv19, 4
  %exitcond23.not.3 = icmp eq i64 %indvars.iv.next20.3, %wide.trip.count22
  br i1 %exitcond23.not.3, label %._crit_edge, label %.lr.ph17, !llvm.loop !18

._crit_edge:                                      ; preds = %.lr.ph17.prol.loopexit, %.lr.ph17, %middle.block27, %.preheader
  ret void
}

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" }

!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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !10}
!16 = distinct !{!16, !12, !13, !14}
!17 = distinct !{!17, !12, !13}
!18 = distinct !{!18, !12, !13}


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